Thomas Gleixner f2545b2d4c jump_label: Reorder hotplug lock and jump_label_lock ...

The conversion of the hotplug locking to a percpu rwsem unearthed lock
ordering issues all over the place.

The jump_label code has two issues:

 1) Nested get_online_cpus() invocations

 2) Ordering problems vs. the cpus rwsem and the jump_label_mutex

To cure these, the following lock order has been established;

   cpus_rwsem -> jump_label_lock -> text_mutex

Even if not all architectures need protection against CPU hotplug, taking
cpus_rwsem before jump_label_lock is now mandatory in code pathes which
actually modify code and therefor need text_mutex protection.

Move the get_online_cpus() invocations into the core jump label code and
establish the proper lock order where required.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Ingo Molnar <mingo@kernel.org>
Acked-by: "David S. Miller" <davem@davemloft.net>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Chris Metcalf <cmetcalf@mellanox.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sebastian Siewior <bigeasy@linutronix.de>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Jason Baron <jbaron@akamai.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Link: http://lkml.kernel.org/r/20170524081549.025830817@linutronix.de

2017-05-26 10:10:45 +02:00

..

.gitignore

…

8250-platform.c

…

asm-offsets.c

MIPS: IRQ Stack: Unwind IRQ stack onto task stack

2017-03-22 11:53:57 +01:00

binfmt_elfn32.c

fs/binfmt: Convert obsolete cputime type to nsecs

2017-02-01 09:13:51 +01:00

binfmt_elfo32.c

fs/binfmt: Convert obsolete cputime type to nsecs

2017-02-01 09:13:51 +01:00

bmips_5xxx_init.S

MIPS: BMIPS: Make whitespacely correct.

2016-05-09 12:00:01 +02:00

bmips_vec.S

MIPS: BMIPS: Add Whirlwind (BMIPS5200) initialization code

2016-05-09 12:00:01 +02:00

branch.c

sched/headers: Prepare for new header dependencies before moving code to <linux/sched/signal.h>

2017-03-02 08:42:29 +01:00

cacheinfo.c

MIPS: Fix cacheinfo overflow

2017-02-13 18:57:34 +00:00

cevt-bcm1480.c

MIPS: clockevent drivers: Set ->min_delta_ticks and ->max_delta_ticks

2017-04-14 13:11:16 -07:00

cevt-ds1287.c

MIPS: clockevent drivers: Set ->min_delta_ticks and ->max_delta_ticks

2017-04-14 13:11:16 -07:00

cevt-gt641xx.c

MIPS: clockevent drivers: Set ->min_delta_ticks and ->max_delta_ticks

2017-04-14 13:11:16 -07:00

cevt-r4k.c

MIPS: cevt-r4k: Fix out-of-bounds array access

2017-04-10 13:31:12 +02:00

cevt-sb1250.c

MIPS: clockevent drivers: Set ->min_delta_ticks and ->max_delta_ticks

2017-04-14 13:11:16 -07:00

cevt-txx9.c

MIPS: clockevent drivers: Set ->min_delta_ticks and ->max_delta_ticks

2017-04-14 13:11:16 -07:00

cps-vec-ns16550.S

MIPS: CPS: Early debug using an ns16550-compatible UART

2015-11-11 08:34:25 +01:00

cps-vec.S

MIPS: smp-cps: Fix retrieval of VPE mask on big endian CPUs

2017-03-21 20:39:40 +01:00

cpu-bugs64.c

MIPS: Fix printk continuations in cpu-bugs64.c

2017-01-24 18:30:34 +01:00

cpu-probe.c

Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus

2017-05-12 09:56:30 -07:00

crash_dump.c

Replace <asm/uaccess.h> with <linux/uaccess.h> globally

2016-12-24 11:46:01 -08:00

crash.c

sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task_stack.h>

2017-03-02 08:42:36 +01:00

csrc-bcm1480.c

clocksource: Use a plain u64 instead of cycle_t

2016-12-25 11:04:12 +01:00

csrc-ioasic.c

clocksource: Use a plain u64 instead of cycle_t

2016-12-25 11:04:12 +01:00

csrc-r4k.c

clocksource: Use a plain u64 instead of cycle_t

2016-12-25 11:04:12 +01:00

csrc-sb1250.c

clocksource: Use a plain u64 instead of cycle_t

2016-12-25 11:04:12 +01:00

early_printk_8250.c

MIPS: Add 8250/16550 serial early printk driver

2013-10-29 21:24:36 +01:00

early_printk.c

early_printk: consolidate random copies of identical code

2013-04-29 18:28:13 -07:00

elf.c

MIPS: Avoid BUG warning in arch_check_elf

2017-04-12 15:22:13 +02:00

entry.S

MIPS: Remove r2_emul_return from struct thread_info

2017-01-03 16:34:41 +01:00

ftrace.c

ftrace: Add return address pointer to ftrace_ret_stack

2016-08-24 12:15:14 +02:00

genex.S

MIPS: IRQ Stack: Unwind IRQ stack onto task stack

2017-03-22 11:53:57 +01:00

gpio_txx9.c

MIPS: txx9: switch to gpiochip_add_data()

2016-02-19 09:51:44 +01:00

head.S

MIPS: store the appended dtb address in a variable

2016-08-02 14:00:16 +02:00

i8253.c

…

idle.c

MIPS: Loongson: Add Loongson-3A R2 basic support

2016-05-13 14:02:14 +02:00

irq_txx9.c

…

irq-gt641xx.c

…

irq-msc01.c

MIPS: MSC: Prevent out-of-bounds writes to MIPS SC ioremap'd region

2014-06-26 10:48:23 +01:00

irq-rm7000.c

…

irq.c

MIPS: Introduce irq_stack

2017-01-03 16:34:34 +01:00

jump_label.c

jump_label: Reorder hotplug lock and jump_label_lock

2017-05-26 10:10:45 +02:00

kgdb.c

MIPS: KGDB: Use kernel context for sleeping threads

2017-04-12 22:29:22 +02:00

kprobes.c

MIPS: tracing: disable uprobe/kprobe on compact branch instructions

2016-10-06 17:37:40 +02:00

linux32.c

MIPS: Return directly in 32_mmap2()

2017-01-25 02:51:11 +01:00

machine_kexec.c

MIPS: kexec: add debug info about the new kexec'ed image

2017-01-03 16:34:46 +01:00

Makefile

MIPS: Export {copy, clear}_page functions alongside their definitions

2017-01-03 16:48:39 +01:00

mcount.S

MIPS: Export _mcount alongside its definition

2017-01-03 16:34:49 +01:00

mips_machine.c

MIPS: move mips_{set,get}_machine_name() to a more generic place

2013-05-08 01:19:07 +02:00

mips-cm.c

tree-wide: replace config_enabled() with IS_ENABLED()

2016-08-04 08:50:07 -04:00

mips-cpc.c

MIPS: CPC: Provide default mips_cpc_default_phys_base to ignore CPC

2016-11-04 00:17:46 +01:00

mips-mt-fpaff.c

sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task.h>

2017-03-02 08:42:35 +01:00

mips-mt.c

MIPS: MT: Remove SMTC support

2014-05-24 00:07:01 +02:00

mips-r2-to-r6-emul.c

Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus

2017-05-12 09:56:30 -07:00

module-rela.c

MIPS: module: fix incorrect IS_ERR_VALUE macro usages

2016-05-13 14:02:11 +02:00

module.c

MIPS: Migrate exception table users off module.h and onto extable.h

2016-10-04 16:13:57 +02:00

octeon_switch.S

MIPS: Fix octeon FP context switch handling

2015-10-02 19:16:06 +02:00

perf_event_mipsxx.c

cpumask: make "nr_cpumask_bits" unsigned

2017-05-08 17:15:11 -07:00

perf_event.c

sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task_stack.h>

2017-03-02 08:42:36 +01:00

pm-cps.c

cpu/hotplug: Cleanup state names

2016-12-25 10:47:44 +01:00

pm.c

MIPS: Fix watchpoint restoration

2016-05-09 12:00:02 +02:00

probes-common.h

MIPS: tracing: disable uprobe/kprobe on compact branch instructions

2016-10-06 17:37:40 +02:00

proc.c

MIPS: Move identification of VP(E) into proc.c from smp-mt.c

2016-10-04 16:13:57 +02:00

process.c

MIPS: Opt into HAVE_COPY_THREAD_TLS

2017-04-12 13:52:21 +02:00

prom.c

MIPS: Use early_init_fdt_reserve_self to protect DTB location

2017-01-03 16:34:45 +01:00

ptrace32.c

sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task_stack.h>

2017-03-02 08:42:36 +01:00

ptrace.c

Merge branch 'regset' (PTRACE_SETREGSET data leakage)

2017-03-29 08:55:25 -07:00

r4k_fpu.S

MIPS: Use copy_s.fmt rather than copy_u.fmt

2016-05-09 12:00:04 +02:00

r4k_switch.S

MIPS: Remove dead define of ST_OFF

2017-04-12 13:52:21 +02:00

r2300_fpu.S

MIPS: Correct MIPS I FP sigcontext layout

2016-11-04 01:39:23 +01:00

r2300_switch.S

MIPS: Export _save_fp & _save_msa alongside their definitions

2017-01-03 16:34:49 +01:00

r6000_fpu.S

MIPS: Fix ISA I/II FP signal context offsets

2016-11-04 01:38:52 +01:00

relocate_kernel.S

MIPS: Replace add and sub instructions in relocate_kernel.S with addiu

2015-08-03 15:26:30 +02:00

relocate.c

MIPS: KASLR: Add missing header files

2017-04-12 17:02:04 +02:00

reset.c

MIPS: Provide fallback reboot/poweroff/halt implementations

2015-04-01 17:21:58 +02:00

rtlx-cmp.c

MIPS: APRP: Fix an issue when device_create() fails.

2014-08-01 17:30:35 +02:00

rtlx-mt.c

MIPS: APRP: Fix an issue when device_create() fails.

2014-08-01 17:30:35 +02:00

rtlx.c

sched/headers: Prepare to move signal wakeup & sigpending methods from <linux/sched.h> into <linux/sched/signal.h>

2017-03-02 08:42:32 +01:00

scall32-o32.S

MIPS: Wire up statx system call

2017-03-08 12:11:13 +01:00

scall64-64.S

MIPS: Wire up statx system call

2017-03-08 12:11:13 +01:00

scall64-n32.S

MIPS: Wire up statx system call

2017-03-08 12:11:13 +01:00

scall64-o32.S

MIPS: Wire up statx system call

2017-03-08 12:11:13 +01:00

segment.c

MIPS: Print segment physical address when EU=1

2016-07-28 11:44:30 +02:00

setup.c

MIPS: kexec: Do not reserve invalid crashkernel memory on boot

2017-01-03 16:34:46 +01:00

signal32.c

Replace <asm/uaccess.h> with <linux/uaccess.h> globally

2016-12-24 11:46:01 -08:00

signal_n32.c

Replace <asm/uaccess.h> with <linux/uaccess.h> globally

2016-12-24 11:46:01 -08:00

signal_o32.c

sched/headers: Prepare for new header dependencies before moving code to <linux/sched/signal.h>

2017-03-02 08:42:29 +01:00

signal-common.h

MIPS: Save MSA extended context around signals

2015-09-03 12:07:59 +02:00

signal.c

Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus

2016-08-06 09:13:11 -04:00

smp-bmips.c

MIPS: Add missing include files

2017-03-08 10:38:06 +01:00

smp-cmp.c

MIPS: Make smp CMP, CPS and MT use the new generic IPI functions

2016-02-25 10:56:58 +01:00

smp-cps.c

Merge branch '4.11-fixes' into mips-for-linux-next

2017-04-13 00:48:47 +02:00

smp-mt.c

MIPS: smp-mt: Use CPU interrupt controller IPI IRQ domain support

2017-04-12 23:13:13 +02:00

smp-up.c

MIPS: SMP: Remove plat_smp_ops cpus_done method.

2014-05-27 11:06:42 +02:00

smp.c

MIPS: Stengthen IPI IRQ domain sanity check

2017-04-12 23:13:44 +02:00

spinlock_test.c

MIPS: Declare mips_debugfs_dir in a header

2015-10-26 09:49:42 +01:00

spram.c

MIPS: Add P6600 cases to CPU switch statements

2016-05-13 14:01:52 +02:00

stacktrace.c

sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task_stack.h>

2017-03-02 08:42:36 +01:00

sync-r4k.c

MIPS: sync-r4k: Fix KERN_CONT fallout

2017-02-13 18:58:39 +00:00

syscall.c

mips: sanitize __access_ok()

2017-04-06 02:08:06 -04:00

sysrq.c

MIPS: Refactor dumping of TLB registers for r3k/r4k

2015-09-03 12:07:45 +02:00

time.c

KVM: MIPS: Implement VZ support

2017-03-28 14:53:54 +01:00

topology.c

…

traps.c

format-security: move static strings to const

2017-05-08 17:15:14 -07:00

unaligned.c

new helper: uaccess_kernel()

2017-03-28 16:43:25 -04:00

uprobes.c

MIPS: uprobes: Remove __weak attribute from arch_uprobe_copy_ixol.

2017-01-03 16:34:48 +01:00

vdso.c

userfaultfd: non-cooperative: add event for memory unmaps

2017-02-24 17:46:55 -08:00

vmlinux.lds.S

debug: Fix __bug_table[] in arch linker scripts

2017-04-03 10:22:40 +02:00

vpe-cmp.c

MIPS: APRP: Add VPE loader support for CMP platforms.

2014-01-22 20:19:02 +01:00

vpe-mt.c

MIPS: MT: Remove SMTC support

2014-05-24 00:07:01 +02:00

vpe.c

module: use a structure to encapsulate layout.

2015-12-04 22:46:25 +01:00

watch.c

MIPS: Add and use watch register field definitions

2016-05-13 14:02:13 +02:00