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Ilya Leoshkevich 67ccddf866 ftrace: Introduce ftrace_need_init_nop() 
Implementing live patching on s390 requires each function's prologue to
contain a very special kind of nop, which gcc and clang don't generate.
However, the current code assumes that if CC_USING_NOP_MCOUNT is
defined, then whatever the compiler generates is good enough.

Move the CC_USING_NOP_MCOUNT check into the new ftrace_need_init_nop()
macro, that the architectures can override.

An alternative solution is to disable using -mnop-mcount in the
Makefile, however, this makes the build logic (even) more complicated
and forces the arch-specific code to deal with the useless __fentry__
symbol.

Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Reviewed-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Link: https://lore.kernel.org/r/20210728212546.128248-2-iii@linux.ibm.com
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
2021-08-03 14:31:40 +02:00
..
bpf
bpf: Fix tail_call_reachable rejection for interpreter when jit failed
2021-07-13 08:19:13 -07:00
cgroup
fs: add vfs_parse_fs_param_source() helper
2021-07-14 09:19:06 -07:00
configs
drivers/char: remove /dev/kmem for good
2021-05-07 00:26:34 -07:00
debug
kernel: debug: Fix unreachable code in gdb_serial_stub()
2021-07-12 11:03:35 -05:00
dma
dma-mapping: handle vmalloc addresses in dma_common_{mmap,get_sgtable}
2021-07-16 11:30:26 +02:00
entry
tick/nohz: Only check for RCU deferred wakeup on user/guest entry when needed
2021-05-31 10:14:49 +02:00
events
Merge branch 'akpm' (patches from Andrew)
2021-06-29 17:29:11 -07:00
gcov
Kconfig: Introduce ARCH_WANTS_NO_INSTR and CC_HAS_NO_PROFILE_FN_ATTR
2021-06-22 11:07:18 -07:00
irq
irqchip fixes for 5.14, take
2021-07-09 15:35:13 +02:00
kcsan
kcsan: use u64 instead of cycles_t
2021-07-30 17:09:02 +02:00
livepatch
Livepatching changes for 5.13
2021-04-27 18:14:38 -07:00
locking
Locking fixes:
2021-07-11 11:06:09 -07:00
power
PM: hibernate: disable when there are active secretmem users
2021-07-08 11:48:21 -07:00
printk
printk changes for 5.14
2021-06-29 12:07:18 -07:00
rcu
rcu: Fix pr_info() formats and values in show_rcu_gp_kthreads()
2021-07-06 15:53:12 -07:00
sched
Three fixes:
2021-07-11 11:13:57 -07:00
time
timers: Fix get_next_timer_interrupt() with no timers pending
2021-07-15 01:23:54 +02:00
trace
ftrace: Introduce ftrace_need_init_nop()
2021-08-03 14:31:40 +02:00
.gitignore
.gitignore: prefix local generated files with a slash
2021-05-02 00:43:35 +09:00
acct.c
kernel/acct.c: use #elif instead of #end and #elif
2020-12-15 22:46:15 -08:00
async.c
kernel/async.c: remove async_unregister_domain()
2021-05-07 00:26:33 -07:00
audit_fsnotify.c
audit_alloc_mark(): don't open-code ERR_CAST()
2021-02-23 10:25:27 -05:00
audit_tree.c
audit: Use list_move instead of list_del/list_add
2021-06-08 22:18:35 -04:00
audit_watch.c
fsnotify: generalize handle_inode_event()
2020-12-03 14:58:35 +01:00
audit.c
lsm: separate security_task_getsecid() into subjective and objective variants
2021-03-22 15:23:32 -04:00
audit.h
audit: remove trailing spaces and tabs
2021-06-10 20:59:05 -04:00
auditfilter.c
lsm: separate security_task_getsecid() into subjective and objective variants
2021-03-22 15:23:32 -04:00
auditsc.c
audit: remove trailing spaces and tabs
2021-06-10 20:59:05 -04:00
backtracetest.c
…
bounds.c
…
capability.c
capability: handle idmapped mounts
2021-01-24 14:27:16 +01:00
cfi.c
add support for Clang CFI
2021-04-08 16:04:20 -07:00
compat.c
…
configs.c
…
context_tracking.c
…
cpu_pm.c
…
cpu.c
A fix for the CPU hotplug and cpusets interaction:
2021-06-29 12:23:02 -07:00
crash_core.c
kdump: use vmlinux_build_id to simplify
2021-07-08 11:48:22 -07:00
crash_dump.c
…
cred.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2021-06-28 20:39:26 -07:00
delayacct.c
delayacct: Add sysctl to enable at runtime
2021-05-12 11:43:25 +02:00
dma.c
…
exec_domain.c
…
exit.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2021-06-28 20:39:26 -07:00
extable.c
…
fail_function.c
fault-injection: handle EI_ETYPE_TRUE
2020-12-15 22:46:19 -08:00
fork.c
Merge branch 'akpm' (patches from Andrew)
2021-06-29 17:29:11 -07:00
freezer.c
sched: Add get_current_state()
2021-06-18 11:43:08 +02:00
futex.c
Locking changes for this cycle:
2021-06-28 11:45:29 -07:00
gen_kheaders.sh
kbuild: clean up ${quiet} checks in shell scripts
2021-05-27 04:01:50 +09:00
groups.c
groups: simplify struct group_info allocation
2021-02-26 09:41:03 -08:00
hung_task.c
Merge branch 'akpm' (patches from Andrew)
2021-07-02 12:08:10 -07:00
iomem.c
…
irq_work.c
irq_work: Make irq_work_queue() NMI-safe again
2021-06-10 10:00:08 +02:00
jump_label.c
jump_label: Fix jump_label_text_reserved() vs __init
2021-07-05 10:46:20 +02:00
kallsyms.c
module: add printk formats to add module build ID to stacktraces
2021-07-08 11:48:22 -07:00
kcmp.c
Merge branch 'exec-update-lock-for-v5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2020-12-15 19:36:48 -08:00
Kconfig.freezer
…
Kconfig.hz
…
Kconfig.locks
…
Kconfig.preempt
sched/core: Disable CONFIG_SCHED_CORE by default
2021-06-28 22:43:05 +02:00
kcov.c
kernel: make kcov_common_handle consider the current context
2020-11-02 18:00:20 -08:00
kexec_core.c
kernel.h: split out panic and oops helpers
2021-07-01 11:06:04 -07:00
kexec_elf.c
…
kexec_file.c
kernel: kexec_file: fix error return code of kexec_calculate_store_digests()
2021-05-07 00:26:32 -07:00
kexec_internal.h
kexec: move machine_kexec_post_load() to public interface
2021-02-22 12:33:26 +00:00
kexec.c
…
kheaders.c
…
kmod.c
modules: add CONFIG_MODPROBE_PATH
2021-05-07 00:26:33 -07:00
kprobes.c
Locking fixes:
2021-07-11 11:06:09 -07:00
ksysfs.c
…
kthread.c
Merge branch 'akpm' (patches from Andrew)
2021-06-29 17:29:11 -07:00
latencytop.c
…
Makefile
kbuild: update config_data.gz only when the content of .config is changed
2021-05-02 00:43:35 +09:00
module_signature.c
module: harden ELF info handling
2021-01-19 10:24:45 +01:00
module_signing.c
module: harden ELF info handling
2021-01-19 10:24:45 +01:00
module-internal.h
…
module.c
module: add printk formats to add module build ID to stacktraces
2021-07-08 11:48:22 -07:00
notifier.c
…
nsproxy.c
fixes-v5.11
2020-12-14 16:40:27 -08:00
padata.c
…
panic.c
kernel.h: split out panic and oops helpers
2021-07-01 11:06:04 -07:00
params.c
Modules updates for v5.11
2020-12-17 13:01:31 -08:00
pid_namespace.c
fixes-v5.11
2020-12-14 16:40:27 -08:00
pid.c
Merge branch 'exec-update-lock-for-v5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2020-12-15 19:36:48 -08:00
profile.c
kernel: Initialize cpumask before parsing
2021-04-10 13:35:54 +02:00
ptrace.c
sched: Change task_struct::state
2021-06-18 11:43:09 +02:00
range.c
…
reboot.c
reboot: Add hardware protection power-off
2021-06-21 13:08:36 +01:00
regset.c
…
relay.c
relay: allow the use of const callback structs
2020-12-15 22:46:18 -08:00
resource_kunit.c
resource: provide meaningful MODULE_LICENSE() in test suite
2020-11-25 18:52:35 +01:00
resource.c
kernel/resource: fix return code check in __request_free_mem_region
2021-05-14 19:41:32 -07:00
rseq.c
rseq: Optimise rseq_get_rseq_cs() and clear_rseq_cs()
2021-04-14 18:04:09 +02:00
scftorture.c
scftorture: Avoid false-positive warnings in scftorture_invoker()
2021-07-06 12:37:55 -07:00
scs.c
scs: switch to vmapped shadow stacks
2020-12-01 10:30:28 +00:00
seccomp.c
seccomp: Support atomic "addfd + send reply"
2021-06-28 12:49:52 -07:00
signal.c
Fix UCOUNT_RLIMIT_SIGPENDING counter leak
2021-07-08 11:43:24 -07:00
smp.c
smp: Fix smp_call_function_single_async prototype
2021-05-06 15:33:49 +02:00
smpboot.c
smpboot: fix duplicate and misplaced inlining directive
2021-07-25 11:06:37 -07:00
smpboot.h
…
softirq.c
sched: Introduce task_is_running()
2021-06-18 11:43:07 +02:00
stackleak.c
…
stacktrace.c
…
static_call.c
static_call: Fix static_call_text_reserved() vs __init
2021-07-05 10:46:33 +02:00
stop_machine.c
stop_machine: Add caller debug info to queue_stop_cpus_work
2021-03-23 16:01:58 +01:00
sys_ni.c
mm: introduce memfd_secret system call to create "secret" memory areas
2021-07-08 11:48:21 -07:00
sys.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2021-06-28 20:39:26 -07:00
sysctl-test.c
kernel/sysctl-test: Remove some casts which are no-longer required
2021-06-23 16:41:24 -06:00
sysctl.c
Merge branch 'akpm' (patches from Andrew)
2021-07-02 12:08:10 -07:00
task_work.c
kasan: record task_work_add() call stack
2021-04-30 11:20:42 -07:00
taskstats.c
treewide: rename nla_strlcpy to nla_strscpy.
2020-11-16 08:08:54 -08:00
test_kprobes.c
…
torture.c
torture: Replace torture_init_begin string with %s
2021-03-08 14:22:28 -08:00
tracepoint.c
tracepoints: Update static_call before tp_funcs when adding a tracepoint
2021-07-23 08:46:22 -04:00
tsacct.c
…
ucount.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2021-06-28 20:39:26 -07:00
uid16.c
…
uid16.h
…
umh.c
kernel/umh.c: fix some spelling mistakes
2021-05-07 00:26:34 -07:00
up.c
A set of locking related fixes and updates:
2021-05-09 13:07:03 -07:00
user_namespace.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2021-06-28 20:39:26 -07:00
user-return-notifier.c
…
user.c
Reimplement RLIMIT_MEMLOCK on top of ucounts
2021-04-30 14:14:02 -05:00
usermode_driver.c
Merge branch 'work.namei' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2021-07-03 11:41:14 -07:00
utsname_sysctl.c
…
utsname.c
…
watch_queue.c
watch_queue: rectify kernel-doc for init_watch()
2021-01-26 11:16:34 +00:00
watchdog_hld.c
…
watchdog.c
kernel: watchdog: modify the explanation related to watchdog thread
2021-06-29 10:53:46 -07:00
workqueue_internal.h
…
workqueue.c
wq: handle VM suspension in stall detection
2021-05-20 12:58:30 -04:00