Merge branch 'akpm' (incoming from Andrew)

Merge third batch of fixes from Andrew Morton:
 "Most of the rest.  I still have two large patchsets against AIO and
  IPC, but they're a bit stuck behind other trees and I'm about to
  vanish for six days.

   - random fixlets
   - inotify
   - more of the MM queue
   - show_stack() cleanups
   - DMI update
   - kthread/workqueue things
   - compat cleanups
   - epoll udpates
   - binfmt updates
   - nilfs2
   - hfs
   - hfsplus
   - ptrace
   - kmod
   - coredump
   - kexec
   - rbtree
   - pids
   - pidns
   - pps
   - semaphore tweaks
   - some w1 patches
   - relay updates
   - core Kconfig changes
   - sysrq tweaks"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (109 commits)
  Documentation/sysrq: fix inconstistent help message of sysrq key
  ethernet/emac/sysrq: fix inconstistent help message of sysrq key
  sparc/sysrq: fix inconstistent help message of sysrq key
  powerpc/xmon/sysrq: fix inconstistent help message of sysrq key
  ARM/etm/sysrq: fix inconstistent help message of sysrq key
  power/sysrq: fix inconstistent help message of sysrq key
  kgdb/sysrq: fix inconstistent help message of sysrq key
  lib/decompress.c: fix initconst
  notifier-error-inject: fix module names in Kconfig
  kernel/sys.c: make prctl(PR_SET_MM) generally available
  UAPI: remove empty Kbuild files
  menuconfig: print more info for symbol without prompts
  init/Kconfig: re-order CONFIG_EXPERT options to fix menuconfig display
  kconfig menu: move Virtualization drivers near other virtualization options
  Kconfig: consolidate CONFIG_DEBUG_STRICT_USER_COPY_CHECKS
  relay: use macro PAGE_ALIGN instead of FIX_SIZE
  kernel/relay.c: move FIX_SIZE macro into relay.c
  kernel/relay.c: remove unused function argument actor
  drivers/w1/slaves/w1_ds2760.c: fix the error handling in w1_ds2760_add_slave()
  drivers/w1/slaves/w1_ds2781.c: fix the error handling in w1_ds2781_add_slave()
  ...

Documentation/sysrq.txt

@@ -129,9 +129,9 @@ On all -  write a character to /proc/sysrq-trigger.  e.g.:
 
 *  Okay, so what can I use them for?
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-Well, un'R'aw is very handy when your X server or a svgalib program crashes.
+Well, unraw(r) is very handy when your X server or a svgalib program crashes.
 
-sa'K' (Secure Access Key) is useful when you want to be sure there is no
+sak(k) (Secure Access Key) is useful when you want to be sure there is no
 trojan program running at console which could grab your password
 when you would try to login. It will kill all programs on given console,
 thus letting you make sure that the login prompt you see is actually
@@ -143,20 +143,20 @@ IMPORTANT: such.                                                   :IMPORTANT
 useful when you want to exit a program that will not let you switch consoles.
 (For example, X or a svgalib program.)
 
-re'B'oot is good when you're unable to shut down. But you should also 'S'ync
+reboot(b) is good when you're unable to shut down. But you should also
-and 'U'mount first.
+sync(s) and umount(u) first.
 
-'C'rash can be used to manually trigger a crashdump when the system is hung.
+crash(c) can be used to manually trigger a crashdump when the system is hung.
 Note that this just triggers a crash if there is no dump mechanism available.
 
-'S'ync is great when your system is locked up, it allows you to sync your
+sync(s) is great when your system is locked up, it allows you to sync your
 disks and will certainly lessen the chance of data loss and fscking. Note
 that the sync hasn't taken place until you see the "OK" and "Done" appear
 on the screen. (If the kernel is really in strife, you may not ever get the
 OK or Done message...)
 
-'U'mount is basically useful in the same ways as 'S'ync. I generally 'S'ync,
+umount(u) is basically useful in the same ways as sync(s). I generally sync(s),
-'U'mount, then re'B'oot when my system locks. It's saved me many a fsck.
+umount(u), then reboot(b) when my system locks. It's saved me many a fsck.
 Again, the unmount (remount read-only) hasn't taken place until you see the
 "OK" and "Done" message appear on the screen.
 
@@ -165,11 +165,11 @@ kernel messages you do not want to see. Selecting '0' will prevent all but
 the most urgent kernel messages from reaching your console. (They will
 still be logged if syslogd/klogd are alive, though.)
 
-t'E'rm and k'I'll are useful if you have some sort of runaway process you
+term(e) and kill(i) are useful if you have some sort of runaway process you
 are unable to kill any other way, especially if it's spawning other
 processes.
 
-"'J'ust thaw it" is useful if your system becomes unresponsive due to a frozen
+"just thaw it(j)" is useful if your system becomes unresponsive due to a frozen
 (probably root) filesystem via the FIFREEZE ioctl.
 
 *  Sometimes SysRq seems to get 'stuck' after using it, what can I do?

arch/alpha/kernel/process.c

@@ -175,6 +175,7 @@ machine_power_off(void)
 void
 show_regs(struct pt_regs *regs)
 {
+	show_regs_print_info(KERN_DEFAULT);
 	dik_show_regs(regs, NULL);
 }
 

arch/alpha/kernel/traps.c

@@ -169,13 +169,6 @@ void show_stack(struct task_struct *task, unsigned long *sp)
 	dik_show_trace(sp);
 }
 
-void dump_stack(void)
-{
-	show_stack(NULL, NULL);
-}
-
-EXPORT_SYMBOL(dump_stack);
-
 void
 die_if_kernel(char * str, struct pt_regs *regs, long err, unsigned long *r9_15)
 {

arch/arc/kernel/stacktrace.c

@@ -220,13 +220,6 @@ void show_stack(struct task_struct *tsk, unsigned long *sp)
 	show_stacktrace(tsk, NULL);
 }
 
-/* Expected by Rest of kernel code */
-void dump_stack(void)
-{
-	show_stacktrace(NULL, NULL);
-}
-EXPORT_SYMBOL(dump_stack);
-
 /* Another API expected by schedular, shows up in "ps" as Wait Channel
  * Ofcourse just returning schedule( ) would be pointless so unwind until
  * the function is not in schedular code

arch/arc/kernel/troubleshoot.c

@@ -71,7 +71,7 @@ void print_task_path_n_nm(struct task_struct *tsk, char *buf)
 	}
 
 done:
-	pr_info("%s, TGID %u\n", path_nm, tsk->tgid);
+	pr_info("Path: %s\n", path_nm);
 }
 EXPORT_SYMBOL(print_task_path_n_nm);
 
@@ -163,6 +163,7 @@ void show_regs(struct pt_regs *regs)
 		return;
 
 	print_task_path_n_nm(tsk, buf);
+	show_regs_print_info(KERN_INFO);
 
 	if (current->thread.cause_code)
 		show_ecr_verbose(regs);

arch/arm/kernel/etm.c

@@ -254,7 +254,7 @@ static void sysrq_etm_dump(int key)
 
 static struct sysrq_key_op sysrq_etm_op = {
 	.handler = sysrq_etm_dump,
-	.help_msg = "ETM buffer dump",
+	.help_msg = "etm-buffer-dump(v)",
 	.action_msg = "etm",
 };
 

arch/arm/kernel/process.c

@@ -225,11 +225,8 @@ void __show_regs(struct pt_regs *regs)
 	unsigned long flags;
 	char buf[64];
 
-	printk("CPU: %d    %s  (%s %.*s)\n",
+	show_regs_print_info(KERN_DEFAULT);
-		raw_smp_processor_id(), print_tainted(),
+
-		init_utsname()->release,
-		(int)strcspn(init_utsname()->version, " "),
-		init_utsname()->version);
 	print_symbol("PC is at %s\n", instruction_pointer(regs));
 	print_symbol("LR is at %s\n", regs->ARM_lr);
 	printk("pc : [<%08lx>]    lr : [<%08lx>]    psr: %08lx\n"
@@ -284,7 +281,6 @@ void __show_regs(struct pt_regs *regs)
 void show_regs(struct pt_regs * regs)
 {
 	printk("\n");
-	printk("Pid: %d, comm: %20s\n", task_pid_nr(current), current->comm);
 	__show_regs(regs);
 	dump_stack();
 }

arch/arm/kernel/traps.c

@@ -204,13 +204,6 @@ static void dump_backtrace(struct pt_regs *regs, struct task_struct *tsk)
 }
 #endif
 
-void dump_stack(void)
-{
-	dump_backtrace(NULL, NULL);
-}
-
-EXPORT_SYMBOL(dump_stack);
-
 void show_stack(struct task_struct *tsk, unsigned long *sp)
 {
 	dump_backtrace(NULL, tsk);

arch/arm64/kernel/process.c

@@ -145,11 +145,7 @@ void __show_regs(struct pt_regs *regs)
 {
 	int i;
 
-	printk("CPU: %d    %s  (%s %.*s)\n",
+	show_regs_print_info(KERN_DEFAULT);
-		raw_smp_processor_id(), print_tainted(),
-		init_utsname()->release,
-		(int)strcspn(init_utsname()->version, " "),
-		init_utsname()->version);
 	print_symbol("PC is at %s\n", instruction_pointer(regs));
 	print_symbol("LR is at %s\n", regs->regs[30]);
 	printk("pc : [<%016llx>] lr : [<%016llx>] pstate: %08llx\n",
@@ -166,7 +162,6 @@ void __show_regs(struct pt_regs *regs)
 void show_regs(struct pt_regs * regs)
 {
 	printk("\n");
-	printk("Pid: %d, comm: %20s\n", task_pid_nr(current), current->comm);
 	__show_regs(regs);
 }
 

arch/arm64/kernel/traps.c

@@ -167,13 +167,6 @@ static void dump_backtrace(struct pt_regs *regs, struct task_struct *tsk)
 	}
 }
 
-void dump_stack(void)
-{
-	dump_backtrace(NULL, NULL);
-}
-
-EXPORT_SYMBOL(dump_stack);
-
 void show_stack(struct task_struct *tsk, unsigned long *sp)
 {
 	dump_backtrace(NULL, tsk);

arch/avr32/kernel/process.c

@@ -204,14 +204,6 @@ void show_stack(struct task_struct *tsk, unsigned long *stack)
 	show_stack_log_lvl(tsk, (unsigned long)stack, NULL, "");
 }
 
-void dump_stack(void)
-{
-	unsigned long stack;
-
-	show_trace_log_lvl(current, &stack, NULL, "");
-}
-EXPORT_SYMBOL(dump_stack);
-
 static const char *cpu_modes[] = {
 	"Application", "Supervisor", "Interrupt level 0", "Interrupt level 1",
 	"Interrupt level 2", "Interrupt level 3", "Exception", "NMI"
@@ -223,6 +215,8 @@ void show_regs_log_lvl(struct pt_regs *regs, const char *log_lvl)
 	unsigned long lr = regs->lr;
 	unsigned long mode = (regs->sr & MODE_MASK) >> MODE_SHIFT;
 
+	show_regs_print_info(log_lvl);
+
 	if (!user_mode(regs)) {
 		sp = (unsigned long)regs + FRAME_SIZE_FULL;
 
@@ -260,9 +254,6 @@ void show_regs_log_lvl(struct pt_regs *regs, const char *log_lvl)
 	       regs->sr & SR_I0M ? '0' : '.',
 	       regs->sr & SR_GM ? 'G' : 'g');
 	printk("%sCPU Mode: %s\n", log_lvl, cpu_modes[mode]);
-	printk("%sProcess: %s [%d] (task: %p thread: %p)\n",
-	       log_lvl, current->comm, current->pid, current,
-	       task_thread_info(current));
 }
 
 void show_regs(struct pt_regs *regs)

arch/blackfin/kernel/dumpstack.c

@@ -168,6 +168,7 @@ void dump_stack(void)
 #endif
 	trace_buffer_save(tflags);
 	dump_bfin_trace_buffer();
+	dump_stack_print_info(KERN_DEFAULT);
 	show_stack(current, &stack);
 	trace_buffer_restore(tflags);
 }

arch/blackfin/kernel/trace.c

@@ -853,6 +853,8 @@ void show_regs(struct pt_regs *fp)
 	unsigned char in_atomic = (bfin_read_IPEND() & 0x10) || in_atomic();
 
 	pr_notice("\n");
+	show_regs_print_info(KERN_NOTICE);
+
 	if (CPUID != bfin_cpuid())
 		pr_notice("Compiled for cpu family 0x%04x (Rev %d), "
 			"but running on:0x%04x (Rev %d)\n",

arch/c6x/kernel/traps.c

@@ -31,6 +31,7 @@ void __init trap_init(void)
 void show_regs(struct pt_regs *regs)
 {
 	pr_err("\n");
+	show_regs_print_info(KERN_ERR);
 	pr_err("PC: %08lx SP: %08lx\n", regs->pc, regs->sp);
 	pr_err("Status: %08lx ORIG_A4: %08lx\n", regs->csr, regs->orig_a4);
 	pr_err("A0: %08lx  B0: %08lx\n", regs->a0, regs->b0);
@@ -67,15 +68,6 @@ void show_regs(struct pt_regs *regs)
 	pr_err("A31: %08lx  B31: %08lx\n", regs->a31, regs->b31);
 }
 
-void dump_stack(void)
-{
-	unsigned long stack;
-
-	show_stack(current, &stack);
-}
-EXPORT_SYMBOL(dump_stack);
-
-
 void die(char *str, struct pt_regs *fp, int nr)
 {
 	console_verbose();

arch/cris/arch-v10/kernel/process.c

@@ -176,6 +176,9 @@ unsigned long get_wchan(struct task_struct *p)
 void show_regs(struct pt_regs * regs)
 {
 	unsigned long usp = rdusp();
+
+	show_regs_print_info(KERN_DEFAULT);
+
 	printk("IRP: %08lx SRP: %08lx DCCR: %08lx USP: %08lx MOF: %08lx\n",
 	       regs->irp, regs->srp, regs->dccr, usp, regs->mof );
 	printk(" r0: %08lx  r1: %08lx   r2: %08lx  r3: %08lx\n",

arch/cris/arch-v32/kernel/process.c

@@ -164,6 +164,9 @@ get_wchan(struct task_struct *p)
 void show_regs(struct pt_regs * regs)
 {
 	unsigned long usp = rdusp();
+
+	show_regs_print_info(KERN_DEFAULT);
+
         printk("ERP: %08lx SRP: %08lx  CCS: %08lx USP: %08lx MOF: %08lx\n",
 		regs->erp, regs->srp, regs->ccs, usp, regs->mof);
 

arch/cris/kernel/traps.c

@@ -146,13 +146,6 @@ show_stack(void)
 }
 #endif
 
-void
-dump_stack(void)
-{
-	show_stack(NULL, NULL);
-}
-EXPORT_SYMBOL(dump_stack);
-
 void
 set_nmi_handler(void (*handler)(struct pt_regs *))
 {

arch/frv/kernel/traps.c

@@ -466,17 +466,6 @@ asmlinkage void compound_exception(unsigned long esfr1,
 	BUG();
 } /* end compound_exception() */
 
-/*****************************************************************************/
-/*
- * The architecture-independent backtrace generator
- */
-void dump_stack(void)
-{
-	show_stack(NULL, NULL);
-}
-
-EXPORT_SYMBOL(dump_stack);
-
 void show_stack(struct task_struct *task, unsigned long *sp)
 {
 }
@@ -508,6 +497,7 @@ void show_regs(struct pt_regs *regs)
 	int loop;
 
 	printk("\n");
+	show_regs_print_info(KERN_DEFAULT);
 
 	printk("Frame: @%08lx [%s]\n",
 	       (unsigned long) regs,
@@ -522,8 +512,6 @@ void show_regs(struct pt_regs *regs)
 		else
 			printk(" | ");
 	}
-
-	printk("Process %s (pid: %d)\n", current->comm, current->pid);
 }
 
 void die_if_kernel(const char *str, ...)

arch/h8300/kernel/process.c

@@ -83,6 +83,8 @@ void machine_power_off(void)
 
 void show_regs(struct pt_regs * regs)
 {
+	show_regs_print_info(KERN_DEFAULT);
+
 	printk("\nPC: %08lx  Status: %02x",
 	       regs->pc, regs->ccr);
 	printk("\nORIG_ER0: %08lx ER0: %08lx ER1: %08lx",

arch/h8300/kernel/traps.c

@@ -164,10 +164,3 @@ void show_trace_task(struct task_struct *tsk)
 {
 	show_stack(tsk,(unsigned long *)tsk->thread.esp0);
 }
-
-void dump_stack(void)
-{
-	show_stack(NULL,NULL);
-}
-
-EXPORT_SYMBOL(dump_stack);

arch/hexagon/kernel/traps.c

@@ -191,14 +191,6 @@ void show_stack(struct task_struct *task, unsigned long *fp)
 	do_show_stack(task, fp, 0);
 }
 
-void dump_stack(void)
-{
-	unsigned long *fp;
-	asm("%0 = r30" : "=r" (fp));
-	show_stack(current, fp);
-}
-EXPORT_SYMBOL(dump_stack);
-
 int die(const char *str, struct pt_regs *regs, long err)
 {
 	static struct {

arch/hexagon/kernel/vm_events.c

@@ -33,6 +33,8 @@
  */
 void show_regs(struct pt_regs *regs)
 {
+	show_regs_print_info(KERN_EMERG);
+
 	printk(KERN_EMERG "restart_r0: \t0x%08lx   syscall_nr: %ld\n",
 	       regs->restart_r0, regs->syscall_nr);
 	printk(KERN_EMERG "preds: \t\t0x%08lx\n", regs->preds);

arch/ia64/kernel/process.c

@@ -95,22 +95,14 @@ show_stack (struct task_struct *task, unsigned long *sp)
 	}
 }
 
-void
-dump_stack (void)
-{
-	show_stack(NULL, NULL);
-}
-
-EXPORT_SYMBOL(dump_stack);
-
 void
 show_regs (struct pt_regs *regs)
 {
 	unsigned long ip = regs->cr_iip + ia64_psr(regs)->ri;
 
 	print_modules();
-	printk("\nPid: %d, CPU %d, comm: %20s\n", task_pid_nr(current),
+	printk("\n");
-			smp_processor_id(), current->comm);
+	show_regs_print_info(KERN_DEFAULT);
 	printk("psr : %016lx ifs : %016lx ip  : [<%016lx>]    %s (%s)\n",
 	       regs->cr_ipsr, regs->cr_ifs, ip, print_tainted(),
 	       init_utsname()->release);

arch/ia64/kernel/setup.c

@@ -1063,6 +1063,7 @@ check_bugs (void)
 static int __init run_dmi_scan(void)
 {
 	dmi_scan_machine();
+	dmi_set_dump_stack_arch_desc();
 	return 0;
 }
 core_initcall(run_dmi_scan);

arch/m32r/kernel/process.c

@@ -73,6 +73,8 @@ void machine_power_off(void)
 void show_regs(struct pt_regs * regs)
 {
 	printk("\n");
+	show_regs_print_info(KERN_DEFAULT);
+
 	printk("BPC[%08lx]:PSW[%08lx]:LR [%08lx]:FP [%08lx]\n", \
 	  regs->bpc, regs->psw, regs->lr, regs->fp);
 	printk("BBPC[%08lx]:BBPSW[%08lx]:SPU[%08lx]:SPI[%08lx]\n", \

arch/m32r/kernel/traps.c

@@ -167,15 +167,6 @@ void show_stack(struct task_struct *task, unsigned long *sp)
 	show_trace(task, sp);
 }
 
-void dump_stack(void)
-{
-	unsigned long stack;
-
-	show_trace(current, &stack);
-}
-
-EXPORT_SYMBOL(dump_stack);
-
 static void show_registers(struct pt_regs *regs)
 {
 	int i = 0;

arch/m68k/kernel/traps.c

@@ -991,18 +991,6 @@ void show_stack(struct task_struct *task, unsigned long *stack)
 	show_trace(stack);
 }
 
-/*
- * The architecture-independent backtrace generator
- */
-void dump_stack(void)
-{
-	unsigned long stack;
-
-	show_trace(&stack);
-}
-
-EXPORT_SYMBOL(dump_stack);
-
 /*
  * The vector number returned in the frame pointer may also contain
  * the "fs" (Fault Status) bits on ColdFire. These are in the bottom

arch/metag/kernel/process.c

@@ -129,6 +129,8 @@ void show_regs(struct pt_regs *regs)
 		"D1.7 "
 	};
 
+	show_regs_print_info(KERN_INFO);
+
 	pr_info(" pt_regs @ %p\n", regs);
 	pr_info(" SaveMask = 0x%04hx\n", regs->ctx.SaveMask);
 	pr_info(" Flags = 0x%04hx (%c%c%c%c)\n", regs->ctx.Flags,

arch/metag/kernel/traps.c

@@ -987,9 +987,3 @@ void show_stack(struct task_struct *tsk, unsigned long *sp)
 
 	show_trace(tsk, sp, NULL);
 }
-
-void dump_stack(void)
-{
-	show_stack(NULL, NULL);
-}
-EXPORT_SYMBOL(dump_stack);

arch/microblaze/kernel/process.c

@@ -20,6 +20,8 @@
 
 void show_regs(struct pt_regs *regs)
 {
+	show_regs_print_info(KERN_INFO);
+
 	pr_info(" Registers dump: mode=%X\r\n", regs->pt_mode);
 	pr_info(" r1=%08lX, r2=%08lX, r3=%08lX, r4=%08lX\n",
 				regs->r1, regs->r2, regs->r3, regs->r4);

arch/microblaze/kernel/traps.c

@@ -75,9 +75,3 @@ void show_stack(struct task_struct *task, unsigned long *sp)
 
 	debug_show_held_locks(task);
 }
-
-void dump_stack(void)
-{
-	show_stack(NULL, NULL);
-}
-EXPORT_SYMBOL(dump_stack);

arch/mips/kernel/traps.c

@@ -206,19 +206,6 @@ void show_stack(struct task_struct *task, unsigned long *sp)
 	show_stacktrace(task, &regs);
 }
 
-/*
- * The architecture-independent dump_stack generator
- */
-void dump_stack(void)
-{
-	struct pt_regs regs;
-
-	prepare_frametrace(&regs);
-	show_backtrace(current, &regs);
-}
-
-EXPORT_SYMBOL(dump_stack);
-
 static void show_code(unsigned int __user *pc)
 {
 	long i;
@@ -244,7 +231,7 @@ static void __show_regs(const struct pt_regs *regs)
 	unsigned int cause = regs->cp0_cause;
 	int i;
 
-	printk("Cpu %d\n", smp_processor_id());
+	show_regs_print_info(KERN_DEFAULT);
 
 	/*
 	 * Saved main processor registers

arch/mn10300/kernel/process.c

@@ -97,6 +97,7 @@ void machine_power_off(void)
 
 void show_regs(struct pt_regs *regs)
 {
+	show_regs_print_info(KERN_DEFAULT);
 }
 
 /*

arch/mn10300/kernel/traps.c

@@ -293,17 +293,6 @@ void show_stack(struct task_struct *task, unsigned long *sp)
 	show_trace(sp);
 }
 
-/*
- * the architecture-independent dump_stack generator
- */
-void dump_stack(void)
-{
-	unsigned long stack;
-
-	show_stack(current, &stack);
-}
-EXPORT_SYMBOL(dump_stack);
-
 /*
  * dump the register file in the specified exception frame
  */

arch/openrisc/kernel/process.c

@@ -90,6 +90,7 @@ void show_regs(struct pt_regs *regs)
 {
 	extern void show_registers(struct pt_regs *regs);
 
+	show_regs_print_info(KERN_DEFAULT);
 	/* __PHX__ cleanup this mess */
 	show_registers(regs);
 }

arch/openrisc/kernel/traps.c

@@ -105,17 +105,6 @@ void show_trace_task(struct task_struct *tsk)
 	 */
 }
 
-/*
- * The architecture-independent backtrace generator
- */
-void dump_stack(void)
-{
-	unsigned long stack;
-
-	show_stack(current, &stack);
-}
-EXPORT_SYMBOL(dump_stack);
-
 void show_registers(struct pt_regs *regs)
 {
 	int i;

arch/parisc/Kconfig

@@ -1,5 +1,6 @@
 config PARISC
 	def_bool y
+	select ARCH_HAS_DEBUG_STRICT_USER_COPY_CHECKS
 	select HAVE_IDE
 	select HAVE_OPROFILE
 	select HAVE_FUNCTION_TRACER if 64BIT

arch/parisc/Kconfig.debug

@@ -12,18 +12,4 @@ config DEBUG_RODATA
          portion of the kernel code won't be covered by a TLB anymore.
          If in doubt, say "N".
 
-config DEBUG_STRICT_USER_COPY_CHECKS
-	bool "Strict copy size checks"
-	depends on DEBUG_KERNEL && !TRACE_BRANCH_PROFILING
-	---help---
-	  Enabling this option turns a certain set of sanity checks for user
-	  copy operations into compile time failures.
-
-	  The copy_from_user() etc checks are there to help test if there
-	  are sufficient security checks on the length argument of
-	  the copy operation, by having gcc prove that the argument is
-	  within bounds.
-
-	  If unsure, or if you run an older (pre 4.4) gcc, say N.
-
 endmenu

arch/parisc/kernel/traps.c

@@ -126,6 +126,8 @@ void show_regs(struct pt_regs *regs)
 	user = user_mode(regs);
 	level = user ? KERN_DEBUG : KERN_CRIT;
 
+	show_regs_print_info(level);
+
 	print_gr(level, regs);
 
 	for (i = 0; i < 8; i += 4)
@@ -158,14 +160,6 @@ void show_regs(struct pt_regs *regs)
 	}
 }
 
-
-void dump_stack(void)
-{
-	show_stack(NULL, NULL);
-}
-
-EXPORT_SYMBOL(dump_stack);
-
 static void do_show_stack(struct unwind_frame_info *info)
 {
 	int i = 1;

arch/powerpc/kernel/process.c

@@ -831,6 +831,8 @@ void show_regs(struct pt_regs * regs)
 {
 	int i, trap;
 
+	show_regs_print_info(KERN_DEFAULT);
+
 	printk("NIP: "REG" LR: "REG" CTR: "REG"\n",
 	       regs->nip, regs->link, regs->ctr);
 	printk("REGS: %p TRAP: %04lx   %s  (%s)\n",
@@ -850,12 +852,6 @@ void show_regs(struct pt_regs * regs)
 #else
 		printk("DAR: "REG", DSISR: %08lx\n", regs->dar, regs->dsisr);
 #endif
-	printk("TASK = %p[%d] '%s' THREAD: %p",
-	       current, task_pid_nr(current), current->comm, task_thread_info(current));
-
-#ifdef CONFIG_SMP
-	printk(" CPU: %d", raw_smp_processor_id());
-#endif /* CONFIG_SMP */
 
 	for (i = 0;  i < 32;  i++) {
 		if ((i % REGS_PER_LINE) == 0)
@@ -1362,12 +1358,6 @@ void show_stack(struct task_struct *tsk, unsigned long *stack)
 	} while (count++ < kstack_depth_to_print);
 }
 
-void dump_stack(void)
-{
-	show_stack(current, NULL);
-}
-EXPORT_SYMBOL(dump_stack);
-
 #ifdef CONFIG_PPC64
 /* Called with hard IRQs off */
 void __ppc64_runlatch_on(void)

arch/powerpc/xmon/xmon.c

@@ -2947,7 +2947,7 @@ static void sysrq_handle_xmon(int key)
 
 static struct sysrq_key_op sysrq_xmon_op = {
 	.handler =	sysrq_handle_xmon,
-	.help_msg =	"Xmon",
+	.help_msg =	"xmon(x)",
 	.action_msg =	"Entering xmon",
 };
 

arch/s390/Kconfig

@@ -91,6 +91,7 @@ config S390
 	select ARCH_INLINE_WRITE_UNLOCK_BH
 	select ARCH_INLINE_WRITE_UNLOCK_IRQ
 	select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE
+	select ARCH_HAS_DEBUG_STRICT_USER_COPY_CHECKS
 	select ARCH_SAVE_PAGE_KEYS if HIBERNATION
 	select ARCH_WANT_IPC_PARSE_VERSION
 	select BUILDTIME_EXTABLE_SORT

arch/s390/Kconfig.debug

@@ -17,20 +17,6 @@ config STRICT_DEVMEM
 
 	  If you are unsure, say Y.
 
-config DEBUG_STRICT_USER_COPY_CHECKS
-	def_bool n
-	prompt "Strict user copy size checks"
-	---help---
-	  Enabling this option turns a certain set of sanity checks for user
-	  copy operations into compile time warnings.
-
-	  The copy_from_user() etc checks are there to help test if there
-	  are sufficient security checks on the length argument of
-	  the copy operation, by having gcc prove that the argument is
-	  within bounds.
-
-	  If unsure, or if you run an older (pre 4.4) gcc, say N.
-
 config S390_PTDUMP
 	bool "Export kernel pagetable layout to userspace via debugfs"
 	depends on DEBUG_KERNEL

arch/s390/kernel/dumpstack.c

@@ -129,23 +129,6 @@ static void show_last_breaking_event(struct pt_regs *regs)
 #endif
 }
 
-/*
- * The architecture-independent dump_stack generator
- */
-void dump_stack(void)
-{
-	printk("CPU: %d %s %s %.*s\n",
-	       task_thread_info(current)->cpu, print_tainted(),
-	       init_utsname()->release,
-	       (int)strcspn(init_utsname()->version, " "),
-	       init_utsname()->version);
-	printk("Process %s (pid: %d, task: %p, ksp: %p)\n",
-	       current->comm, current->pid, current,
-	       (void *) current->thread.ksp);
-	show_stack(NULL, NULL);
-}
-EXPORT_SYMBOL(dump_stack);
-
 static inline int mask_bits(struct pt_regs *regs, unsigned long bits)
 {
 	return (regs->psw.mask & bits) / ((~bits + 1) & bits);
@@ -183,14 +166,7 @@ void show_registers(struct pt_regs *regs)
 
 void show_regs(struct pt_regs *regs)
 {
-	printk("CPU: %d %s %s %.*s\n",
+	show_regs_print_info(KERN_DEFAULT);
-	       task_thread_info(current)->cpu, print_tainted(),
-	       init_utsname()->release,
-	       (int)strcspn(init_utsname()->version, " "),
-	       init_utsname()->version);
-	printk("Process %s (pid: %d, task: %p, ksp: %p)\n",
-	       current->comm, current->pid, current,
-	       (void *) current->thread.ksp);
 	show_registers(regs);
 	/* Show stack backtrace if pt_regs is from kernel mode */
 	if (!user_mode(regs))

arch/s390/lib/Makefile

@@ -3,7 +3,6 @@
 #
 
 lib-y += delay.o string.o uaccess_std.o uaccess_pt.o
-obj-y += usercopy.o
 obj-$(CONFIG_32BIT) += div64.o qrnnd.o ucmpdi2.o mem32.o
 obj-$(CONFIG_64BIT) += mem64.o
 lib-$(CONFIG_64BIT) += uaccess_mvcos.o

arch/score/kernel/traps.c

@@ -117,6 +117,8 @@ static void show_code(unsigned int *pc)
  */
 void show_regs(struct pt_regs *regs)
 {
+	show_regs_print_info(KERN_DEFAULT);
+
 	printk("r0 : %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n",
 		regs->regs[0], regs->regs[1], regs->regs[2], regs->regs[3],
 		regs->regs[4], regs->regs[5], regs->regs[6], regs->regs[7]);
@@ -149,16 +151,6 @@ static void show_registers(struct pt_regs *regs)
 	printk(KERN_NOTICE "\n");
 }
 
-/*
- * The architecture-independent dump_stack generator
- */
-void dump_stack(void)
-{
-	show_stack(current_thread_info()->task,
-		   (long *) get_irq_regs()->regs[0]);
-}
-EXPORT_SYMBOL(dump_stack);
-
 void __die(const char *str, struct pt_regs *regs, const char *file,
 	const char *func, unsigned long line)
 {

arch/sh/kernel/dumpstack.c

@@ -158,9 +158,3 @@ void show_stack(struct task_struct *tsk, unsigned long *sp)
 		 (unsigned long)task_stack_page(tsk));
 	show_trace(tsk, sp, NULL);
 }
-
-void dump_stack(void)
-{
-	show_stack(NULL, NULL);
-}
-EXPORT_SYMBOL(dump_stack);

arch/sh/kernel/process_32.c

@@ -32,11 +32,7 @@
 void show_regs(struct pt_regs * regs)
 {
 	printk("\n");
-	printk("Pid : %d, Comm: \t\t%s\n", task_pid_nr(current), current->comm);
+	show_regs_print_info(KERN_DEFAULT);
-	printk("CPU : %d        \t\t%s  (%s %.*s)\n\n",
-	       smp_processor_id(), print_tainted(), init_utsname()->release,
-	       (int)strcspn(init_utsname()->version, " "),
-	       init_utsname()->version);
 
 	print_symbol("PC is at %s\n", instruction_pointer(regs));
 	print_symbol("PR is at %s\n", regs->pr);

arch/sh/kernel/process_64.c

@@ -40,6 +40,7 @@ void show_regs(struct pt_regs *regs)
 	unsigned long long ah, al, bh, bl, ch, cl;
 
 	printk("\n");
+	show_regs_print_info(KERN_DEFAULT);
 
 	ah = (regs->pc) >> 32;
 	al = (regs->pc) & 0xffffffff;

arch/sparc/kernel/process_32.c

@@ -112,6 +112,8 @@ void show_regs(struct pt_regs *r)
 {
 	struct reg_window32 *rw = (struct reg_window32 *) r->u_regs[14];
 
+	show_regs_print_info(KERN_DEFAULT);
+
         printk("PSR: %08lx PC: %08lx NPC: %08lx Y: %08lx    %s\n",
 	       r->psr, r->pc, r->npc, r->y, print_tainted());
 	printk("PC: <%pS>\n", (void *) r->pc);
@@ -142,11 +144,13 @@ void show_stack(struct task_struct *tsk, unsigned long *_ksp)
 	struct reg_window32 *rw;
 	int count = 0;
 
-	if (tsk != NULL)
+	if (!tsk)
-		task_base = (unsigned long) task_stack_page(tsk);
+		tsk = current;
-	else
-		task_base = (unsigned long) current_thread_info();
 
+	if (tsk == current && !_ksp)
+		__asm__ __volatile__("mov	%%fp, %0" : "=r" (_ksp));
+
+	task_base = (unsigned long) task_stack_page(tsk);
 	fp = (unsigned long) _ksp;
 	do {
 		/* Bogus frame pointer? */
@@ -162,17 +166,6 @@ void show_stack(struct task_struct *tsk, unsigned long *_ksp)
 	printk("\n");
 }
 
-void dump_stack(void)
-{
-	unsigned long *ksp;
-
-	__asm__ __volatile__("mov	%%fp, %0"
-			     : "=r" (ksp));
-	show_stack(current, ksp);
-}
-
-EXPORT_SYMBOL(dump_stack);
-
 /*
  * Note: sparc64 has a pretty intricated thread_saved_pc, check it out.
  */

arch/sparc/kernel/process_64.c

@@ -163,6 +163,8 @@ static void show_regwindow(struct pt_regs *regs)
 
 void show_regs(struct pt_regs *regs)
 {
+	show_regs_print_info(KERN_DEFAULT);
+
 	printk("TSTATE: %016lx TPC: %016lx TNPC: %016lx Y: %08x    %s\n", regs->tstate,
 	       regs->tpc, regs->tnpc, regs->y, print_tainted());
 	printk("TPC: <%pS>\n", (void *) regs->tpc);
@@ -292,7 +294,7 @@ static void sysrq_handle_globreg(int key)
 
 static struct sysrq_key_op sparc_globalreg_op = {
 	.handler	= sysrq_handle_globreg,
-	.help_msg	= "global-regs(Y)",
+	.help_msg	= "global-regs(y)",
 	.action_msg	= "Show Global CPU Regs",
 };
 
@@ -362,7 +364,7 @@ static void sysrq_handle_globpmu(int key)
 
 static struct sysrq_key_op sparc_globalpmu_op = {
 	.handler	= sysrq_handle_globpmu,
-	.help_msg	= "global-pmu(X)",
+	.help_msg	= "global-pmu(x)",
 	.action_msg	= "Show Global PMU Regs",
 };
 

arch/sparc/kernel/traps_64.c

@@ -2350,13 +2350,6 @@ void show_stack(struct task_struct *tsk, unsigned long *_ksp)
 	} while (++count < 16);
 }
 
-void dump_stack(void)
-{
-	show_stack(current, NULL);
-}
-
-EXPORT_SYMBOL(dump_stack);
-
 static inline struct reg_window *kernel_stack_up(struct reg_window *rw)
 {
 	unsigned long fp = rw->ins[6];

arch/sparc/lib/Makefile

@@ -45,4 +45,3 @@ obj-y                 += iomap.o
 obj-$(CONFIG_SPARC32) += atomic32.o ucmpdi2.o
 obj-y                 += ksyms.o
 obj-$(CONFIG_SPARC64) += PeeCeeI.o
-obj-y                 += usercopy.o

arch/sparc/lib/usercopy.c

@@ -1,9 +0,0 @@
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/bug.h>
-
-void copy_from_user_overflow(void)
-{
-	WARN(1, "Buffer overflow detected!\n");
-}
-EXPORT_SYMBOL(copy_from_user_overflow);

arch/tile/Kconfig

@@ -19,6 +19,7 @@ config TILE
 	select HAVE_SYSCALL_WRAPPERS if TILEGX
 	select VIRT_TO_BUS
 	select SYS_HYPERVISOR
+	select ARCH_HAS_DEBUG_STRICT_USER_COPY_CHECKS
 	select ARCH_HAVE_NMI_SAFE_CMPXCHG
 	select GENERIC_CLOCKEVENTS
 	select MODULES_USE_ELF_RELA
@@ -114,13 +115,6 @@ config STRICT_DEVMEM
 config SMP
 	def_bool y
 
-# Allow checking for compile-time determined overflow errors in
-# copy_from_user().  There are still unprovable places in the
-# generic code as of 2.6.34, so this option is not really compatible
-# with -Werror, which is more useful in general.
-config DEBUG_COPY_FROM_USER
-	def_bool n
-
 config HVC_TILE
 	depends on TTY
 	select HVC_DRIVER

arch/tile/include/asm/uaccess.h

@@ -395,7 +395,12 @@ _copy_from_user(void *to, const void __user *from, unsigned long n)
 	return n;
 }
 
-#ifdef CONFIG_DEBUG_COPY_FROM_USER
+#ifdef CONFIG_DEBUG_STRICT_USER_COPY_CHECKS
+/*
+ * There are still unprovable places in the generic code as of 2.6.34, so this
+ * option is not really compatible with -Werror, which is more useful in
+ * general.
+ */
 extern void copy_from_user_overflow(void)
 	__compiletime_warning("copy_from_user() size is not provably correct");
 

arch/tile/kernel/process.c

@@ -573,8 +573,7 @@ void show_regs(struct pt_regs *regs)
 	int i;
 
 	pr_err("\n");
-	pr_err(" Pid: %d, comm: %20s, CPU: %d\n",
+	show_regs_print_info(KERN_ERR);
-	       tsk->pid, tsk->comm, smp_processor_id());
 #ifdef __tilegx__
 	for (i = 0; i < 51; i += 3)
 		pr_err(" r%-2d: "REGFMT" r%-2d: "REGFMT" r%-2d: "REGFMT"\n",

arch/tile/lib/uaccess.c

@@ -22,11 +22,3 @@ int __range_ok(unsigned long addr, unsigned long size)
 		 is_arch_mappable_range(addr, size));
 }
 EXPORT_SYMBOL(__range_ok);
-
-#ifdef CONFIG_DEBUG_COPY_FROM_USER
-void copy_from_user_overflow(void)
-{
-       WARN(1, "Buffer overflow detected!\n");
-}
-EXPORT_SYMBOL(copy_from_user_overflow);
-#endif

arch/um/kernel/sysrq.c

@@ -35,18 +35,6 @@ void show_trace(struct task_struct *task, unsigned long * stack)
 }
 #endif
 
-/*
- * stack dumps generator - this is used by arch-independent code.
- * And this is identical to i386 currently.
- */
-void dump_stack(void)
-{
-	unsigned long stack;
-
-	show_trace(current, &stack);
-}
-EXPORT_SYMBOL(dump_stack);
-
 /*Stolen from arch/i386/kernel/traps.c */
 static const int kstack_depth_to_print = 24;
 

arch/um/sys-ppc/sysrq.c

@@ -11,6 +11,8 @@
 void show_regs(struct pt_regs_subarch *regs)
 {
 	printk("\n");
+	show_regs_print_info(KERN_DEFAULT);
+
 	printk("show_regs(): insert regs here.\n");
 #if 0
         printk("\n");

arch/unicore32/kernel/process.c

@@ -144,11 +144,7 @@ void __show_regs(struct pt_regs *regs)
 	unsigned long flags;
 	char buf[64];
 
-	printk(KERN_DEFAULT "CPU: %d    %s  (%s %.*s)\n",
+	show_regs_print_info(KERN_DEFAULT);
-		raw_smp_processor_id(), print_tainted(),
-		init_utsname()->release,
-		(int)strcspn(init_utsname()->version, " "),
-		init_utsname()->version);
 	print_symbol("PC is at %s\n", instruction_pointer(regs));
 	print_symbol("LR is at %s\n", regs->UCreg_lr);
 	printk(KERN_DEFAULT "pc : [<%08lx>]    lr : [<%08lx>]    psr: %08lx\n"

arch/unicore32/kernel/traps.c

@@ -170,12 +170,6 @@ static void dump_backtrace(struct pt_regs *regs, struct task_struct *tsk)
 		c_backtrace(fp, mode);
 }
 
-void dump_stack(void)
-{
-	dump_backtrace(NULL, NULL);
-}
-EXPORT_SYMBOL(dump_stack);
-
 void show_stack(struct task_struct *tsk, unsigned long *sp)
 {
 	dump_backtrace(NULL, tsk);

arch/x86/Kconfig

@@ -20,6 +20,7 @@ config X86_64
 ### Arch settings
 config X86
 	def_bool y
+	select ARCH_HAS_DEBUG_STRICT_USER_COPY_CHECKS
 	select HAVE_AOUT if X86_32
 	select HAVE_UNSTABLE_SCHED_CLOCK
 	select ARCH_SUPPORTS_NUMA_BALANCING

arch/x86/Kconfig.debug

@@ -292,20 +292,6 @@ config OPTIMIZE_INLINING
 
 	  If unsure, say N.
 
-config DEBUG_STRICT_USER_COPY_CHECKS
-	bool "Strict copy size checks"
-	depends on DEBUG_KERNEL && !TRACE_BRANCH_PROFILING
-	---help---
-	  Enabling this option turns a certain set of sanity checks for user
-	  copy operations into compile time failures.
-
-	  The copy_from_user() etc checks are there to help test if there
-	  are sufficient security checks on the length argument of
-	  the copy operation, by having gcc prove that the argument is
-	  within bounds.
-
-	  If unsure, or if you run an older (pre 4.4) gcc, say N.
-
 config DEBUG_NMI_SELFTEST
 	bool "NMI Selftest"
 	depends on DEBUG_KERNEL && X86_LOCAL_APIC

arch/x86/ia32/ia32_aout.c

@@ -162,7 +162,6 @@ static int aout_core_dump(long signr, struct pt_regs *regs, struct file *file,
 	fs = get_fs();
 	set_fs(KERNEL_DS);
 	has_dumped = 1;
-	current->flags |= PF_DUMPCORE;
 	strncpy(dump.u_comm, current->comm, sizeof(current->comm));
 	dump.u_ar0 = offsetof(struct user32, regs);
 	dump.signal = signr;

arch/x86/include/asm/bug.h

@@ -37,7 +37,4 @@ do {								\
 
 #include <asm-generic/bug.h>
 
-
-extern void show_regs_common(void);
-
 #endif /* _ASM_X86_BUG_H */

arch/x86/kernel/dumpstack.c

@@ -176,26 +176,20 @@ void show_trace(struct task_struct *task, struct pt_regs *regs,
 
 void show_stack(struct task_struct *task, unsigned long *sp)
 {
-	show_stack_log_lvl(task, NULL, sp, 0, "");
+	unsigned long bp = 0;
-}
-
-/*
- * The architecture-independent dump_stack generator
- */
-void dump_stack(void)
-{
-	unsigned long bp;
 	unsigned long stack;
 
-	bp = stack_frame(current, NULL);
+	/*
-	printk("Pid: %d, comm: %.20s %s %s %.*s\n",
+	 * Stack frames below this one aren't interesting.  Don't show them
-		current->pid, current->comm, print_tainted(),
+	 * if we're printing for %current.
-		init_utsname()->release,
+	 */
-		(int)strcspn(init_utsname()->version, " "),
+	if (!sp && (!task || task == current)) {
-		init_utsname()->version);
+		sp = &stack;
-	show_trace(NULL, NULL, &stack, bp);
+		bp = stack_frame(current, NULL);
+	}
+
+	show_stack_log_lvl(task, NULL, sp, bp, "");
 }
-EXPORT_SYMBOL(dump_stack);
 
 static arch_spinlock_t die_lock = __ARCH_SPIN_LOCK_UNLOCKED;
 static int die_owner = -1;

arch/x86/kernel/dumpstack_32.c

@@ -86,11 +86,9 @@ void show_regs(struct pt_regs *regs)
 {
 	int i;
 
+	show_regs_print_info(KERN_EMERG);
 	__show_regs(regs, !user_mode_vm(regs));
 
-	pr_emerg("Process %.*s (pid: %d, ti=%p task=%p task.ti=%p)\n",
-		 TASK_COMM_LEN, current->comm, task_pid_nr(current),
-		 current_thread_info(), current, task_thread_info(current));
 	/*
 	 * When in-kernel, we also print out the stack and code at the
 	 * time of the fault..

arch/x86/kernel/dumpstack_64.c

@@ -249,14 +249,10 @@ void show_regs(struct pt_regs *regs)
 {
 	int i;
 	unsigned long sp;
-	const int cpu = smp_processor_id();
-	struct task_struct *cur = current;
 
 	sp = regs->sp;
-	printk("CPU %d ", cpu);
+	show_regs_print_info(KERN_DEFAULT);
 	__show_regs(regs, 1);
-	printk(KERN_DEFAULT "Process %s (pid: %d, threadinfo %p, task %p)\n",
-	       cur->comm, cur->pid, task_thread_info(cur), cur);
 
 	/*
 	 * When in-kernel, we also print out the stack and code at the

arch/x86/kernel/process.c

@@ -121,30 +121,6 @@ void exit_thread(void)
 	drop_fpu(me);
 }
 
-void show_regs_common(void)
-{
-	const char *vendor, *product, *board;
-
-	vendor = dmi_get_system_info(DMI_SYS_VENDOR);
-	if (!vendor)
-		vendor = "";
-	product = dmi_get_system_info(DMI_PRODUCT_NAME);
-	if (!product)
-		product = "";
-
-	/* Board Name is optional */
-	board = dmi_get_system_info(DMI_BOARD_NAME);
-
-	printk(KERN_DEFAULT "Pid: %d, comm: %.20s %s %s %.*s %s %s%s%s\n",
-	       current->pid, current->comm, print_tainted(),
-	       init_utsname()->release,
-	       (int)strcspn(init_utsname()->version, " "),
-	       init_utsname()->version,
-	       vendor, product,
-	       board ? "/" : "",
-	       board ? board : "");
-}
-
 void flush_thread(void)
 {
 	struct task_struct *tsk = current;

arch/x86/kernel/process_32.c

@@ -84,8 +84,6 @@ void __show_regs(struct pt_regs *regs, int all)
 		savesegment(gs, gs);
 	}
 
-	show_regs_common();
-
 	printk(KERN_DEFAULT "EIP: %04x:[<%08lx>] EFLAGS: %08lx CPU: %d\n",
 			(u16)regs->cs, regs->ip, regs->flags,
 			smp_processor_id());

arch/x86/kernel/process_64.c

@@ -62,7 +62,6 @@ void __show_regs(struct pt_regs *regs, int all)
 	unsigned int fsindex, gsindex;
 	unsigned int ds, cs, es;
 
-	show_regs_common();
 	printk(KERN_DEFAULT "RIP: %04lx:[<%016lx>] ", regs->cs & 0xffff, regs->ip);
 	printk_address(regs->ip, 1);
 	printk(KERN_DEFAULT "RSP: %04lx:%016lx  EFLAGS: %08lx\n", regs->ss,

arch/x86/kernel/setup.c

@@ -996,6 +996,7 @@ void __init setup_arch(char **cmdline_p)
 		efi_init();
 
 	dmi_scan_machine();
+	dmi_set_dump_stack_arch_desc();
 
 	/*
 	 * VMware detection requires dmi to be available, so this

arch/x86/lib/usercopy_32.c

@@ -689,9 +689,3 @@ _copy_from_user(void *to, const void __user *from, unsigned long n)
 	return n;
 }
 EXPORT_SYMBOL(_copy_from_user);
-
-void copy_from_user_overflow(void)
-{
-	WARN(1, "Buffer overflow detected!\n");
-}
-EXPORT_SYMBOL(copy_from_user_overflow);

arch/xtensa/kernel/traps.c

@@ -383,6 +383,8 @@ void show_regs(struct pt_regs * regs)
 {
 	int i, wmask;
 
+	show_regs_print_info(KERN_DEFAULT);
+
 	wmask = regs->wmask & ~1;
 
 	for (i = 0; i < 16; i++) {
@@ -481,14 +483,6 @@ void show_stack(struct task_struct *task, unsigned long *sp)
 	show_trace(task, stack);
 }
 
-void dump_stack(void)
-{
-	show_stack(current, NULL);
-}
-
-EXPORT_SYMBOL(dump_stack);
-
-
 void show_code(unsigned int *pc)
 {
 	long i;

drivers/Kconfig

@@ -120,6 +120,8 @@ source "drivers/vfio/Kconfig"
 
 source "drivers/vlynq/Kconfig"
 
+source "drivers/virt/Kconfig"
+
 source "drivers/virtio/Kconfig"
 
 source "drivers/hv/Kconfig"
@@ -144,8 +146,6 @@ source "drivers/remoteproc/Kconfig"
 
 source "drivers/rpmsg/Kconfig"
 
-source "drivers/virt/Kconfig"
-
 source "drivers/devfreq/Kconfig"
 
 source "drivers/extcon/Kconfig"

drivers/block/aoe/aoechr.c

@@ -139,13 +139,12 @@ bail:		spin_unlock_irqrestore(&emsgs_lock, flags);
 		return;
 	}
 
-	mp = kmalloc(n, GFP_ATOMIC);
+	mp = kmemdup(msg, n, GFP_ATOMIC);
 	if (mp == NULL) {
 		printk(KERN_ERR "aoe: allocation failure, len=%ld\n", n);
 		goto bail;
 	}
 
-	memcpy(mp, msg, n);
 	em->msg = mp;
 	em->flags |= EMFL_VALID;
 	em->len = n;

drivers/block/nbd.c

@@ -856,6 +856,8 @@ static int __init nbd_init(void)
 		disk->queue->limits.discard_granularity = 512;
 		disk->queue->limits.max_discard_sectors = UINT_MAX;
 		disk->queue->limits.discard_zeroes_data = 0;
+		blk_queue_max_hw_sectors(disk->queue, 65536);
+		disk->queue->limits.max_sectors = 256;
 	}
 
 	if (register_blkdev(NBD_MAJOR, "nbd")) {

drivers/char/random.c

@@ -1485,6 +1485,7 @@ unsigned int get_random_int(void)
 
 	return ret;
 }
+EXPORT_SYMBOL(get_random_int);
 
 /*
  * randomize_range() returns a start address such that

drivers/firmware/dmi_scan.c

@@ -22,6 +22,9 @@ static u16 __initdata dmi_ver;
  */
 static int dmi_initialized;
 
+/* DMI system identification string used during boot */
+static char dmi_ids_string[128] __initdata;
+
 static const char * __init dmi_string_nosave(const struct dmi_header *dm, u8 s)
 {
 	const u8 *bp = ((u8 *) dm) + dm->length;
@@ -376,99 +379,103 @@ static void __init dmi_decode(const struct dmi_header *dm, void *dummy)
 	}
 }
 
-static void __init print_filtered(const char *info)
+static int __init print_filtered(char *buf, size_t len, const char *info)
 {
+	int c = 0;
 	const char *p;
 
 	if (!info)
-		return;
+		return c;
 
 	for (p = info; *p; p++)
 		if (isprint(*p))
-			printk(KERN_CONT "%c", *p);
+			c += scnprintf(buf + c, len - c, "%c", *p);
 		else
-			printk(KERN_CONT "\\x%02x", *p & 0xff);
+			c += scnprintf(buf + c, len - c, "\\x%02x", *p & 0xff);
+	return c;
 }
 
-static void __init dmi_dump_ids(void)
+static void __init dmi_format_ids(char *buf, size_t len)
 {
+	int c = 0;
 	const char *board;	/* Board Name is optional */
 
-	printk(KERN_DEBUG "DMI: ");
+	c += print_filtered(buf + c, len - c,
-	print_filtered(dmi_get_system_info(DMI_SYS_VENDOR));
+			    dmi_get_system_info(DMI_SYS_VENDOR));
-	printk(KERN_CONT " ");
+	c += scnprintf(buf + c, len - c, " ");
-	print_filtered(dmi_get_system_info(DMI_PRODUCT_NAME));
+	c += print_filtered(buf + c, len - c,
+			    dmi_get_system_info(DMI_PRODUCT_NAME));
+
 	board = dmi_get_system_info(DMI_BOARD_NAME);
 	if (board) {
-		printk(KERN_CONT "/");
+		c += scnprintf(buf + c, len - c, "/");
-		print_filtered(board);
+		c += print_filtered(buf + c, len - c, board);
 	}
-	printk(KERN_CONT ", BIOS ");
+	c += scnprintf(buf + c, len - c, ", BIOS ");
-	print_filtered(dmi_get_system_info(DMI_BIOS_VERSION));
+	c += print_filtered(buf + c, len - c,
-	printk(KERN_CONT " ");
+			    dmi_get_system_info(DMI_BIOS_VERSION));
-	print_filtered(dmi_get_system_info(DMI_BIOS_DATE));
+	c += scnprintf(buf + c, len - c, " ");
-	printk(KERN_CONT "\n");
+	c += print_filtered(buf + c, len - c,
+			    dmi_get_system_info(DMI_BIOS_DATE));
 }
 
-static int __init dmi_present(const char __iomem *p)
+static int __init dmi_present(const u8 *buf)
 {
-	u8 buf[15];
+	int smbios_ver;
 
-	memcpy_fromio(buf, p, 15);
+	if (memcmp(buf, "_SM_", 4) == 0 &&
-	if (dmi_checksum(buf, 15)) {
+	    buf[5] < 32 && dmi_checksum(buf, buf[5])) {
+		smbios_ver = (buf[6] << 8) + buf[7];
+
+		/* Some BIOS report weird SMBIOS version, fix that up */
+		switch (smbios_ver) {
+		case 0x021F:
+		case 0x0221:
+			pr_debug("SMBIOS version fixup(2.%d->2.%d)\n",
+				 smbios_ver & 0xFF, 3);
+			smbios_ver = 0x0203;
+			break;
+		case 0x0233:
+			pr_debug("SMBIOS version fixup(2.%d->2.%d)\n", 51, 6);
+			smbios_ver = 0x0206;
+			break;
+		}
+	} else {
+		smbios_ver = 0;
+	}
+
+	buf += 16;
+
+	if (memcmp(buf, "_DMI_", 5) == 0 && dmi_checksum(buf, 15)) {
 		dmi_num = (buf[13] << 8) | buf[12];
 		dmi_len = (buf[7] << 8) | buf[6];
 		dmi_base = (buf[11] << 24) | (buf[10] << 16) |
 			(buf[9] << 8) | buf[8];
 
 		if (dmi_walk_early(dmi_decode) == 0) {
-			if (dmi_ver)
+			if (smbios_ver) {
+				dmi_ver = smbios_ver;
 				pr_info("SMBIOS %d.%d present.\n",
 				       dmi_ver >> 8, dmi_ver & 0xFF);
-			else {
+			} else {
 				dmi_ver = (buf[14] & 0xF0) << 4 |
 					   (buf[14] & 0x0F);
 				pr_info("Legacy DMI %d.%d present.\n",
 				       dmi_ver >> 8, dmi_ver & 0xFF);
 			}
-			dmi_dump_ids();
+			dmi_format_ids(dmi_ids_string, sizeof(dmi_ids_string));
+			printk(KERN_DEBUG "DMI: %s\n", dmi_ids_string);
 			return 0;
 		}
 	}
-	dmi_ver = 0;
-	return 1;
-}
 
-static int __init smbios_present(const char __iomem *p)
-{
-	u8 buf[32];
-
-	memcpy_fromio(buf, p, 32);
-	if ((buf[5] < 32) && dmi_checksum(buf, buf[5])) {
-		dmi_ver = (buf[6] << 8) + buf[7];
-
-		/* Some BIOS report weird SMBIOS version, fix that up */
-		switch (dmi_ver) {
-		case 0x021F:
-		case 0x0221:
-			pr_debug("SMBIOS version fixup(2.%d->2.%d)\n",
-			       dmi_ver & 0xFF, 3);
-			dmi_ver = 0x0203;
-			break;
-		case 0x0233:
-			pr_debug("SMBIOS version fixup(2.%d->2.%d)\n", 51, 6);
-			dmi_ver = 0x0206;
-			break;
-		}
-		return memcmp(p + 16, "_DMI_", 5) || dmi_present(p + 16);
-	}
 	return 1;
 }
 
 void __init dmi_scan_machine(void)
 {
 	char __iomem *p, *q;
-	int rc;
+	char buf[32];
 
 	if (efi_enabled(EFI_CONFIG_TABLES)) {
 		if (efi.smbios == EFI_INVALID_TABLE_ADDR)
@@ -481,10 +488,10 @@ void __init dmi_scan_machine(void)
 		p = dmi_ioremap(efi.smbios, 32);
 		if (p == NULL)
 			goto error;
-
+		memcpy_fromio(buf, p, 32);
-		rc = smbios_present(p);
 		dmi_iounmap(p, 32);
-		if (!rc) {
+
+		if (!dmi_present(buf)) {
 			dmi_available = 1;
 			goto out;
 		}
@@ -499,18 +506,15 @@ void __init dmi_scan_machine(void)
 		if (p == NULL)
 			goto error;
 
+		memset(buf, 0, 16);
 		for (q = p; q < p + 0x10000; q += 16) {
-			if (memcmp(q, "_SM_", 4) == 0 && q - p <= 0xFFE0)
+			memcpy_fromio(buf + 16, q, 16);
-				rc = smbios_present(q);
+			if (!dmi_present(buf)) {
-			else if (memcmp(q, "_DMI_", 5) == 0)
-				rc = dmi_present(q);
-			else
-				continue;
-			if (!rc) {
 				dmi_available = 1;
 				dmi_iounmap(p, 0x10000);
 				goto out;
 			}
+			memcpy(buf, buf + 16, 16);
 		}
 		dmi_iounmap(p, 0x10000);
 	}
@@ -520,6 +524,19 @@ void __init dmi_scan_machine(void)
 	dmi_initialized = 1;
 }
 
+/**
+ * dmi_set_dump_stack_arch_desc - set arch description for dump_stack()
+ *
+ * Invoke dump_stack_set_arch_desc() with DMI system information so that
+ * DMI identifiers are printed out on task dumps.  Arch boot code should
+ * call this function after dmi_scan_machine() if it wants to print out DMI
+ * identifiers on task dumps.
+ */
+void __init dmi_set_dump_stack_arch_desc(void)
+{
+	dump_stack_set_arch_desc("%s", dmi_ids_string);
+}
+
 /**
  *	dmi_matches - check if dmi_system_id structure matches system DMI data
  *	@dmi: pointer to the dmi_system_id structure to check

drivers/memstick/host/r592.c

@@ -847,7 +847,7 @@ static void r592_remove(struct pci_dev *pdev)
 			dev->dummy_dma_page_physical_address);
 }
 
-#ifdef CONFIG_PM
+#ifdef CONFIG_PM_SLEEP
 static int r592_suspend(struct device *core_dev)
 {
 	struct pci_dev *pdev = to_pci_dev(core_dev);
@@ -870,10 +870,10 @@ static int r592_resume(struct device *core_dev)
 	r592_update_card_detect(dev);
 	return 0;
 }
-
-SIMPLE_DEV_PM_OPS(r592_pm_ops, r592_suspend, r592_resume);
 #endif
 
+static SIMPLE_DEV_PM_OPS(r592_pm_ops, r592_suspend, r592_resume);
+
 MODULE_DEVICE_TABLE(pci, r592_pci_id_tbl);
 
 static struct pci_driver r852_pci_driver = {
@@ -881,9 +881,7 @@ static struct pci_driver r852_pci_driver = {
 	.id_table	= r592_pci_id_tbl,
 	.probe		= r592_probe,
 	.remove		= r592_remove,
-#ifdef CONFIG_PM
 	.driver.pm	= &r592_pm_ops,
-#endif
 };
 
 static __init int r592_module_init(void)

drivers/message/i2o/i2o_config.c

@@ -687,6 +687,11 @@ static int i2o_cfg_passthru32(struct file *file, unsigned cmnd,
 		}
 		size = size >> 16;
 		size *= 4;
+		if (size > sizeof(rmsg)) {
+			rcode = -EINVAL;
+			goto sg_list_cleanup;
+		}
+
 		/* Copy in the user's I2O command */
 		if (copy_from_user(rmsg, user_msg, size)) {
 			rcode = -EFAULT;
@@ -922,6 +927,11 @@ static int i2o_cfg_passthru(unsigned long arg)
 		}
 		size = size >> 16;
 		size *= 4;
+		if (size > sizeof(rmsg)) {
+			rcode = -EFAULT;
+			goto sg_list_cleanup;
+		}
+
 		/* Copy in the user's I2O command */
 		if (copy_from_user(rmsg, user_msg, size)) {
 			rcode = -EFAULT;

drivers/net/ethernet/ibm/emac/debug.c

@@ -245,7 +245,7 @@ static void emac_sysrq_handler(int key)
 
 static struct sysrq_key_op emac_sysrq_op = {
 	.handler = emac_sysrq_handler,
-	.help_msg = "emaC",
+	.help_msg = "emac(c)",
 	.action_msg = "Show EMAC(s) status",
 };
 

drivers/pps/Kconfig

@@ -20,10 +20,10 @@ config PPS
 
 	  To compile this driver as a module, choose M here: the module
 	  will be called pps_core.ko.
+if PPS
 
 config PPS_DEBUG
 	bool "PPS debugging messages"
-	depends on PPS
 	help
 	  Say Y here if you want the PPS support to produce a bunch of debug
 	  messages to the system log.  Select this if you are having a
@@ -31,13 +31,15 @@ config PPS_DEBUG
 
 config NTP_PPS
 	bool "PPS kernel consumer support"
-	depends on PPS && !NO_HZ
+	depends on !NO_HZ
 	help
 	  This option adds support for direct in-kernel time
 	  synchronization using an external PPS signal.
 
 	  It doesn't work on tickless systems at the moment.
 
+endif
+
 source drivers/pps/clients/Kconfig
 
 source drivers/pps/generators/Kconfig

drivers/pps/kc.c

@@ -34,10 +34,10 @@
  */
 
 /* state variables to bind kernel consumer */
-DEFINE_SPINLOCK(pps_kc_hardpps_lock);
+static DEFINE_SPINLOCK(pps_kc_hardpps_lock);
 /* PPS API (RFC 2783): current source and mode for kernel consumer */
-struct pps_device *pps_kc_hardpps_dev;	/* unique pointer to device */
+static struct pps_device *pps_kc_hardpps_dev;	/* unique pointer to device */
-int pps_kc_hardpps_mode;		/* mode bits for kernel consumer */
+static int pps_kc_hardpps_mode;		/* mode bits for kernel consumer */
 
 /* pps_kc_bind - control PPS kernel consumer binding
  * @pps: the PPS source

drivers/staging/speakup/kobjects.c

@@ -15,6 +15,7 @@
 #include <linux/kernel.h>
 #include <linux/kobject.h>
 #include <linux/string.h>
+#include <linux/string_helpers.h>
 #include <linux/sysfs.h>
 #include <linux/ctype.h>
 
@@ -417,7 +418,7 @@ static ssize_t synth_direct_store(struct kobject *kobj,
 		bytes = min_t(size_t, len, 250);
 		strncpy(tmp, ptr, bytes);
 		tmp[bytes] = '\0';
-		spk_xlate(tmp);
+		string_unescape_any_inplace(tmp);
 		synth_printf("%s", tmp);
 		ptr += bytes;
 		len -= bytes;
@@ -605,7 +606,8 @@ ssize_t spk_var_store(struct kobject *kobj, struct kobj_attribute *attr,
 	if (param->data == NULL)
 		return 0;
 	ret = 0;
-	cp = spk_xlate((char *) buf);
+	cp = (char *)buf;
+	string_unescape_any_inplace(cp);
 
 	spk_lock(flags);
 	switch (param->var_type) {

drivers/staging/speakup/speakup.h

@@ -54,7 +54,6 @@ void spk_get_index_count(int *linecount, int *sentcount);
 extern int spk_set_key_info(const u_char *key_info, u_char *k_buffer);
 extern char *spk_strlwr(char *s);
 extern char *spk_s2uchar(char *start, char *dest);
-extern char *spk_xlate(char *s);
 extern int speakup_kobj_init(void);
 extern void speakup_kobj_exit(void);
 extern int spk_chartab_get_value(char *keyword);

drivers/staging/speakup/varhandlers.c

@@ -328,49 +328,3 @@ char *spk_s2uchar(char *start, char *dest)
 	*dest = (u_char)val;
 	return start;
 }
-
-char *spk_xlate(char *s)
-{
-	static const char finds[] = "nrtvafe";
-	static const char subs[] = "\n\r\t\013\001\014\033";
-	static const char hx[] = "0123456789abcdefABCDEF";
-	char *p = s, *p1, *p2, c;
-	int num;
-	while ((p = strchr(p, '\\'))) {
-		p1 = p+1;
-		p2 = strchr(finds, *p1);
-		if (p2) {
-			*p++ = subs[p2-finds];
-			p1++;
-		} else if (*p1 >= '0' && *p1 <= '7') {
-			num = (*p1++)&7;
-			while (num < 32 && *p1 >= '0' && *p1 <= '7') {
-				num <<= 3;
-				num += (*p1++)&7;
-			}
-			*p++ = num;
-		} else if (*p1 == 'x' &&
-				strchr(hx, p1[1]) && strchr(hx, p1[2])) {
-			p1++;
-			c = *p1++;
-			if (c > '9')
-				c = (c - '7') & 0x0f;
-			else
-				c -= '0';
-			num = c << 4;
-			c = *p1++;
-			if (c > '9')
-				c = (c-'7')&0x0f;
-			else
-				c -= '0';
-			num += c;
-			*p++ = num;
-		} else
-			*p++ = *p1++;
-		p2 = p;
-		while (*p1)
-			*p2++ = *p1++;
-		*p2 = '\0';
-	}
-	return s;
-}

drivers/staging/zcache/Kconfig

@@ -1,5 +1,5 @@
 config ZCACHE
-	bool "Dynamic compression of swap pages and clean pagecache pages"
+	tristate "Dynamic compression of swap pages and clean pagecache pages"
 	depends on CRYPTO=y && SWAP=y && CLEANCACHE && FRONTSWAP
 	select CRYPTO_LZO
 	default n
@@ -19,8 +19,8 @@ config ZCACHE_DEBUG
 	  how zcache is doing. You probably want to set this to 'N'.
 
 config RAMSTER
-	bool "Cross-machine RAM capacity sharing, aka peer-to-peer tmem"
+	tristate "Cross-machine RAM capacity sharing, aka peer-to-peer tmem"
-	depends on CONFIGFS_FS=y && SYSFS=y && !HIGHMEM && ZCACHE=y
+	depends on CONFIGFS_FS=y && SYSFS=y && !HIGHMEM && ZCACHE
 	depends on NET
 	# must ensure struct page is 8-byte aligned
 	select HAVE_ALIGNED_STRUCT_PAGE if !64BIT

drivers/staging/zcache/ramster.h

@@ -11,10 +11,14 @@
 #ifndef _ZCACHE_RAMSTER_H_
 #define _ZCACHE_RAMSTER_H_
 
+#ifdef CONFIG_RAMSTER_MODULE
+#define CONFIG_RAMSTER
+#endif
+
 #ifdef CONFIG_RAMSTER
 #include "ramster/ramster.h"
 #else
-static inline void ramster_init(bool x, bool y, bool z)
+static inline void ramster_init(bool x, bool y, bool z, bool w)
 {
 }
 

drivers/staging/zcache/ramster/debug.c

@@ -43,7 +43,7 @@ static struct debug_entry {
 };
 #undef ATTR
 
-int __init ramster_debugfs_init(void)
+int ramster_debugfs_init(void)
 {
 	int i;
 	struct dentry *root = debugfs_create_dir("ramster", NULL);

drivers/staging/zcache/ramster/nodemanager.c

@@ -949,7 +949,7 @@ static void __exit exit_r2nm(void)
 	r2hb_exit();
 }
 
-static int __init init_r2nm(void)
+int r2nm_init(void)
 {
 	int ret = -1;
 
@@ -986,10 +986,11 @@ out_r2hb:
 out:
 	return ret;
 }
+EXPORT_SYMBOL_GPL(r2nm_init);
 
 MODULE_AUTHOR("Oracle");
 MODULE_LICENSE("GPL");
 
-/* module_init(init_r2nm) */
+#ifndef CONFIG_RAMSTER_MODULE
-late_initcall(init_r2nm);
+late_initcall(r2nm_init);
-/* module_exit(exit_r2nm) */
+#endif

drivers/staging/zcache/ramster/ramster.c

@@ -121,6 +121,7 @@ int ramster_do_preload_flnode(struct tmem_pool *pool)
 		kmem_cache_free(ramster_flnode_cache, flnode);
 	return ret;
 }
+EXPORT_SYMBOL_GPL(ramster_do_preload_flnode);
 
 /*
  * Called by the message handler after a (still compressed) page has been
@@ -388,6 +389,7 @@ void *ramster_pampd_free(void *pampd, struct tmem_pool *pool,
 	}
 	return local_pampd;
 }
+EXPORT_SYMBOL_GPL(ramster_pampd_free);
 
 void ramster_count_foreign_pages(bool eph, int count)
 {
@@ -408,6 +410,7 @@ void ramster_count_foreign_pages(bool eph, int count)
 		}
 	}
 }
+EXPORT_SYMBOL_GPL(ramster_count_foreign_pages);
 
 /*
  * For now, just push over a few pages every few seconds to
@@ -593,7 +596,7 @@ requeue:
 	ramster_remotify_queue_delayed_work(HZ);
 }
 
-void __init ramster_remotify_init(void)
+void ramster_remotify_init(void)
 {
 	unsigned long n = 60UL;
 	ramster_remotify_workqueue =
@@ -768,8 +771,10 @@ static bool frontswap_selfshrinking __read_mostly;
 static void selfshrink_process(struct work_struct *work);
 static DECLARE_DELAYED_WORK(selfshrink_worker, selfshrink_process);
 
+#ifndef CONFIG_RAMSTER_MODULE
 /* Enable/disable with kernel boot option. */
-static bool use_frontswap_selfshrink __initdata = true;
+static bool use_frontswap_selfshrink = true;
+#endif
 
 /*
  * The default values for the following parameters were deemed reasonable
@@ -824,6 +829,7 @@ static void frontswap_selfshrink(void)
 	frontswap_shrink(tgt_frontswap_pages);
 }
 
+#ifndef CONFIG_RAMSTER_MODULE
 static int __init ramster_nofrontswap_selfshrink_setup(char *s)
 {
 	use_frontswap_selfshrink = false;
@@ -831,6 +837,7 @@ static int __init ramster_nofrontswap_selfshrink_setup(char *s)
 }
 
 __setup("noselfshrink", ramster_nofrontswap_selfshrink_setup);
+#endif
 
 static void selfshrink_process(struct work_struct *work)
 {
@@ -849,6 +856,7 @@ void ramster_cpu_up(int cpu)
 	per_cpu(ramster_remoteputmem1, cpu) = p1;
 	per_cpu(ramster_remoteputmem2, cpu) = p2;
 }
+EXPORT_SYMBOL_GPL(ramster_cpu_up);
 
 void ramster_cpu_down(int cpu)
 {
@@ -864,6 +872,7 @@ void ramster_cpu_down(int cpu)
 		kp->flnode = NULL;
 	}
 }
+EXPORT_SYMBOL_GPL(ramster_cpu_down);
 
 void ramster_register_pamops(struct tmem_pamops *pamops)
 {
@@ -874,9 +883,11 @@ void ramster_register_pamops(struct tmem_pamops *pamops)
 	pamops->repatriate = ramster_pampd_repatriate;
 	pamops->repatriate_preload = ramster_pampd_repatriate_preload;
 }
+EXPORT_SYMBOL_GPL(ramster_register_pamops);
 
-void __init ramster_init(bool cleancache, bool frontswap,
+void ramster_init(bool cleancache, bool frontswap,
-				bool frontswap_exclusive_gets)
+				bool frontswap_exclusive_gets,
+				bool frontswap_selfshrink)
 {
 	int ret = 0;
 
@@ -891,10 +902,17 @@ void __init ramster_init(bool cleancache, bool frontswap,
 	if (ret)
 		pr_err("ramster: can't create sysfs for ramster\n");
 	(void)r2net_register_handlers();
+#ifdef CONFIG_RAMSTER_MODULE
+	ret = r2nm_init();
+	if (ret)
+		pr_err("ramster: can't init r2net\n");
+	frontswap_selfshrinking = frontswap_selfshrink;
+#else
+	frontswap_selfshrinking = use_frontswap_selfshrink;
+#endif
 	INIT_LIST_HEAD(&ramster_rem_op_list);
 	ramster_flnode_cache = kmem_cache_create("ramster_flnode",
 				sizeof(struct flushlist_node), 0, 0, NULL);
-	frontswap_selfshrinking = use_frontswap_selfshrink;
 	if (frontswap_selfshrinking) {
 		pr_info("ramster: Initializing frontswap selfshrink driver.\n");
 		schedule_delayed_work(&selfshrink_worker,
@@ -902,3 +920,4 @@ void __init ramster_init(bool cleancache, bool frontswap,
 	}
 	ramster_remotify_init();
 }
+EXPORT_SYMBOL_GPL(ramster_init);

drivers/staging/zcache/ramster/ramster.h

@@ -147,7 +147,7 @@ extern int r2net_register_handlers(void);
 extern int r2net_remote_target_node_set(int);
 
 extern int ramster_remotify_pageframe(bool);
-extern void ramster_init(bool, bool, bool);
+extern void ramster_init(bool, bool, bool, bool);
 extern void ramster_register_pamops(struct tmem_pamops *);
 extern int ramster_localify(int, struct tmem_oid *oidp, uint32_t, char *,
 				unsigned int, void *);

drivers/staging/zcache/ramster/ramster_nodemanager.h

@@ -36,4 +36,6 @@
 /* host name, group name, cluster name all 64 bytes */
 #define R2NM_MAX_NAME_LEN        64    /* __NEW_UTS_LEN */
 
+extern int r2nm_init(void);
+
 #endif /* _RAMSTER_NODEMANAGER_H */

drivers/staging/zcache/tmem.c

@@ -35,7 +35,8 @@
 #include <linux/list.h>
 #include <linux/spinlock.h>
 #include <linux/atomic.h>
-#ifdef CONFIG_RAMSTER
+#include <linux/export.h>
+#if defined(CONFIG_RAMSTER) || defined(CONFIG_RAMSTER_MODULE)
 #include <linux/delay.h>
 #endif
 
@@ -641,6 +642,7 @@ void *tmem_localify_get_pampd(struct tmem_pool *pool, struct tmem_oid *oidp,
 	/* note, hashbucket remains locked */
 	return pampd;
 }
+EXPORT_SYMBOL_GPL(tmem_localify_get_pampd);
 
 void tmem_localify_finish(struct tmem_obj *obj, uint32_t index,
 			  void *pampd, void *saved_hb, bool delete)
@@ -658,6 +660,7 @@ void tmem_localify_finish(struct tmem_obj *obj, uint32_t index,
 	}
 	spin_unlock(&hb->lock);
 }
+EXPORT_SYMBOL_GPL(tmem_localify_finish);
 
 /*
  * For ramster only.  Helper function to support asynchronous tmem_get.
@@ -719,6 +722,7 @@ out:
 	spin_unlock(&hb->lock);
 	return ret;
 }
+EXPORT_SYMBOL_GPL(tmem_replace);
 #endif
 
 /*

drivers/staging/zcache/tmem.h

@@ -126,7 +126,7 @@ static inline unsigned tmem_oid_hash(struct tmem_oid *oidp)
 				TMEM_HASH_BUCKET_BITS);
 }
 
-#ifdef CONFIG_RAMSTER
+#if defined(CONFIG_RAMSTER) || defined(CONFIG_RAMSTER_MODULE)
 struct tmem_xhandle {
 	uint8_t client_id;
 	uint8_t xh_data_cksum;
@@ -171,7 +171,7 @@ struct tmem_obj {
 	unsigned int objnode_tree_height;
 	unsigned long objnode_count;
 	long pampd_count;
-#ifdef CONFIG_RAMSTER
+#if defined(CONFIG_RAMSTER) || defined(CONFIG_RAMSTER_MODULE)
 	/*
 	 * for current design of ramster, all pages belonging to
 	 * an object reside on the same remotenode and extra is
@@ -215,7 +215,7 @@ struct tmem_pamops {
 				uint32_t);
 	void (*free)(void *, struct tmem_pool *,
 				struct tmem_oid *, uint32_t, bool);
-#ifdef CONFIG_RAMSTER
+#if defined(CONFIG_RAMSTER) || defined(CONFIG_RAMSTER_MODULE)
 	void (*new_obj)(struct tmem_obj *);
 	void (*free_obj)(struct tmem_pool *, struct tmem_obj *, bool);
 	void *(*repatriate_preload)(void *, struct tmem_pool *,
@@ -247,7 +247,7 @@ extern int tmem_flush_page(struct tmem_pool *, struct tmem_oid *,
 extern int tmem_flush_object(struct tmem_pool *, struct tmem_oid *);
 extern int tmem_destroy_pool(struct tmem_pool *);
 extern void tmem_new_pool(struct tmem_pool *, uint32_t);
-#ifdef CONFIG_RAMSTER
+#if defined(CONFIG_RAMSTER) || defined(CONFIG_RAMSTER_MODULE)
 extern int tmem_replace(struct tmem_pool *, struct tmem_oid *, uint32_t index,
 			void *);
 extern void *tmem_localify_get_pampd(struct tmem_pool *, struct tmem_oid *,

drivers/staging/zcache/zcache-main.c

@@ -37,8 +37,10 @@
 #include "debug.h"
 #ifdef CONFIG_RAMSTER
 static bool ramster_enabled __read_mostly;
+static int disable_frontswap_selfshrink;
 #else
 #define ramster_enabled false
+#define disable_frontswap_selfshrink 0
 #endif
 
 #ifndef __PG_WAS_ACTIVE
@@ -81,8 +83,12 @@ static char *namestr __read_mostly = "zcache";
 	(__GFP_FS | __GFP_NORETRY | __GFP_NOWARN | __GFP_NOMEMALLOC)
 
 /* crypto API for zcache  */
+#ifdef CONFIG_ZCACHE_MODULE
+static char *zcache_comp_name = "lzo";
+#else
 #define ZCACHE_COMP_NAME_SZ CRYPTO_MAX_ALG_NAME
 static char zcache_comp_name[ZCACHE_COMP_NAME_SZ] __read_mostly;
+#endif
 static struct crypto_comp * __percpu *zcache_comp_pcpu_tfms __read_mostly;
 
 enum comp_op {
@@ -1576,9 +1582,9 @@ static struct cleancache_ops zcache_cleancache_ops = {
 	.init_fs = zcache_cleancache_init_fs
 };
 
-struct cleancache_ops zcache_cleancache_register_ops(void)
+struct cleancache_ops *zcache_cleancache_register_ops(void)
 {
-	struct cleancache_ops old_ops =
+	struct cleancache_ops *old_ops =
 		cleancache_register_ops(&zcache_cleancache_ops);
 
 	return old_ops;
@@ -1707,9 +1713,9 @@ static struct frontswap_ops zcache_frontswap_ops = {
 	.init = zcache_frontswap_init
 };
 
-struct frontswap_ops zcache_frontswap_register_ops(void)
+struct frontswap_ops *zcache_frontswap_register_ops(void)
 {
-	struct frontswap_ops old_ops =
+	struct frontswap_ops *old_ops =
 		frontswap_register_ops(&zcache_frontswap_ops);
 
 	return old_ops;
@@ -1721,6 +1727,7 @@ struct frontswap_ops zcache_frontswap_register_ops(void)
  * OR NOTHING HAPPENS!
  */
 
+#ifndef CONFIG_ZCACHE_MODULE
 static int __init enable_zcache(char *s)
 {
 	zcache_enabled = true;
@@ -1787,18 +1794,27 @@ static int __init enable_zcache_compressor(char *s)
 	return 1;
 }
 __setup("zcache=", enable_zcache_compressor);
+#endif
 
 
-static int __init zcache_comp_init(void)
+static int zcache_comp_init(void)
 {
 	int ret = 0;
 
 	/* check crypto algorithm */
+#ifdef CONFIG_ZCACHE_MODULE
+	ret = crypto_has_comp(zcache_comp_name, 0, 0);
+	if (!ret) {
+		ret = -1;
+		goto out;
+	}
+#else
 	if (*zcache_comp_name != '\0') {
 		ret = crypto_has_comp(zcache_comp_name, 0, 0);
 		if (!ret)
 			pr_info("zcache: %s not supported\n",
 					zcache_comp_name);
+		goto out;
 	}
 	if (!ret)
 		strcpy(zcache_comp_name, "lzo");
@@ -1807,6 +1823,7 @@ static int __init zcache_comp_init(void)
 		ret = 1;
 		goto out;
 	}
+#endif
 	pr_info("zcache: using %s compressor\n", zcache_comp_name);
 
 	/* alloc percpu transforms */
@@ -1818,10 +1835,13 @@ out:
 	return ret;
 }
 
-static int __init zcache_init(void)
+static int zcache_init(void)
 {
 	int ret = 0;
 
+#ifdef CONFIG_ZCACHE_MODULE
+	zcache_enabled = 1;
+#endif
 	if (ramster_enabled) {
 		namestr = "ramster";
 		ramster_register_pamops(&zcache_pamops);
@@ -1860,7 +1880,7 @@ static int __init zcache_init(void)
 	}
 	zbud_init();
 	if (zcache_enabled && !disable_cleancache) {
-		struct cleancache_ops old_ops;
+		struct cleancache_ops *old_ops;
 
 		register_shrinker(&zcache_shrinker);
 		old_ops = zcache_cleancache_register_ops();
@@ -1870,11 +1890,11 @@ static int __init zcache_init(void)
 		pr_info("%s: cleancache: ignorenonactive = %d\n",
 			namestr, !disable_cleancache_ignore_nonactive);
 #endif
-		if (old_ops.init_fs != NULL)
+		if (old_ops != NULL)
 			pr_warn("%s: cleancache_ops overridden\n", namestr);
 	}
 	if (zcache_enabled && !disable_frontswap) {
-		struct frontswap_ops old_ops;
+		struct frontswap_ops *old_ops;
 
 		old_ops = zcache_frontswap_register_ops();
 		if (frontswap_has_exclusive_gets)
@@ -1886,14 +1906,36 @@ static int __init zcache_init(void)
 			namestr, frontswap_has_exclusive_gets,
 			!disable_frontswap_ignore_nonactive);
 #endif
-		if (old_ops.init != NULL)
+		if (IS_ERR(old_ops) || old_ops) {
+			if (IS_ERR(old_ops))
+				return PTR_RET(old_ops);
 			pr_warn("%s: frontswap_ops overridden\n", namestr);
+		}
 	}
 	if (ramster_enabled)
 		ramster_init(!disable_cleancache, !disable_frontswap,
-				frontswap_has_exclusive_gets);
+				frontswap_has_exclusive_gets,
+				!disable_frontswap_selfshrink);
 out:
 	return ret;
 }
 
+#ifdef CONFIG_ZCACHE_MODULE
+#ifdef CONFIG_RAMSTER
+module_param(ramster_enabled, int, S_IRUGO);
+module_param(disable_frontswap_selfshrink, int, S_IRUGO);
+#endif
+module_param(disable_cleancache, int, S_IRUGO);
+module_param(disable_frontswap, int, S_IRUGO);
+#ifdef FRONTSWAP_HAS_EXCLUSIVE_GETS
+module_param(frontswap_has_exclusive_gets, bool, S_IRUGO);
+#endif
+module_param(disable_frontswap_ignore_nonactive, int, S_IRUGO);
+module_param(zcache_comp_name, charp, S_IRUGO);
+module_init(zcache_init);
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Dan Magenheimer <dan.magenheimer@oracle.com>");
+MODULE_DESCRIPTION("In-kernel compression of cleancache/frontswap pages");
+#else
 late_initcall(zcache_init);
+#endif

drivers/staging/zcache/zcache.h

@@ -39,7 +39,7 @@ extern int zcache_flush_page(int, int, struct tmem_oid *, uint32_t);
 extern int zcache_flush_object(int, int, struct tmem_oid *);
 extern void zcache_decompress_to_page(char *, unsigned int, struct page *);
 
-#ifdef CONFIG_RAMSTER
+#if defined(CONFIG_RAMSTER) || defined(CONFIG_RAMSTER_MODULE)
 extern void *zcache_pampd_create(char *, unsigned int, bool, int,
 				struct tmem_handle *);
 int zcache_autocreate_pool(unsigned int cli_id, unsigned int pool_id, bool eph);

drivers/usb/storage/realtek_cr.c

@@ -933,14 +933,11 @@ static int realtek_cr_autosuspend_setup(struct us_data *us)
 
 static void realtek_cr_destructor(void *extra)
 {
-	struct rts51x_chip *chip = (struct rts51x_chip *)extra;
+	struct rts51x_chip *chip = extra;
-	struct us_data *us;
 
 	if (!chip)
 		return;
 
-	us = chip->us;
-
 #ifdef CONFIG_REALTEK_AUTOPM
 	if (ss_en) {
 		del_timer(&chip->rts51x_suspend_timer);