Hannes Frederic Sowa c4b2c0c5f6 static_key: WARN on usage before jump_label_init was called ... Usage of the static key primitives to toggle a branch must not be used before jump_label_init() is called from init/main.c. jump_label_init reorganizes and wires up the jump_entries so usage before that could have unforeseen consequences. Following primitives are now checked for correct use: * static_key_slow_inc * static_key_slow_dec * static_key_slow_dec_deferred * jump_label_rate_limit The x86 architecture already checks this by testing if the default_nop was already replaced with an optimal nop or with a branch instruction. It will panic then. Other architectures don't check for this. Because we need to relax this check for the x86 arch to allow code to transition from default_nop to the enabled state and other architectures did not check for this at all this patch introduces checking on the static_key primitives in a non-arch dependent manner. All checked functions are considered slow-path so the additional check does no harm to performance. The warnings are best observed with earlyprintk. Based on a patch from Andi Kleen. Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Andi Kleen <andi@firstfloor.org> Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: David S. Miller <davem@davemloft.net>		2013-10-19 19:45:35 -04:00
..
cpu
debug
events	perf: Fix capabilities bitfield compatibility in 'struct perf_event_mmap_page'	2013-09-20 09:45:11 +02:00
gcov	kernel: replace strict_strto*() with kstrto*()	2013-09-12 15:38:03 -07:00
irq	Remove GENERIC_HARDIRQ config option	2013-09-13 15:09:52 +02:00
power	ACPI and power management fixes for 3.12-rc1	2013-09-12 11:22:45 -07:00
printk	TTY/Serial driver patches for 3.12-rc1	2013-09-03 11:38:36 -07:00
sched	sched/balancing: Fix cfs_rq->task_h_load calculation	2013-09-20 11:59:39 +02:00
time	Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2013-09-18 11:24:49 -05:00
trace	Not much changes for the 3.12 merge window. The major tracing changes	2013-09-09 14:42:15 -07:00
.gitignore
acct.c
async.c
audit_tree.c
audit_watch.c
audit.c	audit: fix endless wait in audit_log_start()	2013-09-24 17:00:26 -07:00
audit.h
auditfilter.c
auditsc.c
backtracetest.c
bounds.c
capability.c	xfs: update for v3.12-rc1	2013-09-09 11:19:09 -07:00
cgroup_freezer.c	cgroup: make css_for_each_descendant() and friends include the origin css in the iteration	2013-08-08 20:11:27 -04:00
cgroup.c	Kill indirect include of file.h from eventfd.h, use fdget() in cgroup.c	2013-09-07 19:54:57 -04:00
compat.c
configs.c
context_tracking.c	arm: Fix build error with context tracking calls	2013-09-27 17:59:47 +02:00
cpu_pm.c
cpu.c	ACPI / processor: Acquire writer lock to update CPU maps	2013-08-13 12:20:16 +02:00
cpuset.c	Merge branch 'for-3.12' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup	2013-09-03 18:25:03 -07:00
crash_dump.c
cred.c
delayacct.c
dma.c
elfcore.c
exec_domain.c
exit.c
extable.c	extable: skip sorting if the table is empty	2013-09-11 15:58:25 -07:00
fork.c	Merge git://git.kvack.org/~bcrl/aio-next	2013-09-13 10:55:58 -07:00
freezer.c	freezer: set PF_SUSPEND_TASK flag on tasks that call freeze_processes	2013-07-30 14:05:06 +02:00
futex_compat.c
futex.c
groups.c	userns: Kill nsown_capable it makes the wrong thing easy	2013-08-30 23:44:11 -07:00
hrtimer.c	kernel: delete __cpuinit usage from all core kernel files	2013-07-14 19:36:59 -04:00
hung_task.c	hung_task debugging: Print more info when reporting the problem	2013-08-02 11:02:42 +02:00
irq_work.c
itimer.c
jump_label.c	static_key: WARN on usage before jump_label_init was called	2013-10-19 19:45:35 -04:00
kallsyms.c
kcmp.c
Kconfig.freezer
Kconfig.hz
Kconfig.locks
Kconfig.preempt
kexec.c	kexec: remove unnecessary return	2013-09-11 15:59:10 -07:00
kmod.c	kernel/kmod.c: check for NULL in call_usermodehelper_exec()	2013-09-30 14:31:02 -07:00
kprobes.c	kprobes: allow to specify custom allocator for insn caches	2013-09-11 15:58:52 -07:00
ksysfs.c	kernel: replace strict_strto*() with kstrto*()	2013-09-12 15:38:03 -07:00
kthread.c
latencytop.c
lglock.c
lockdep_internals.h
lockdep_proc.c
lockdep_states.h
lockdep.c
Makefile	Remove GENERIC_HARDIRQ config option	2013-09-13 15:09:52 +02:00
modsign_certificate.S
modsign_pubkey.c	kernel/modsign_pubkey.c: fix init const for module signing code	2013-09-11 15:58:21 -07:00
module_signing.c
module-internal.h
module.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2013-09-05 08:50:26 -07:00
mutex-debug.c
mutex-debug.h
mutex.c	Merge branch 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2013-09-04 08:18:19 -07:00
mutex.h
notifier.c
nsproxy.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace	2013-09-07 14:35:32 -07:00
padata.c	padata - Register hotcpu notifier after initialization	2013-08-29 14:37:59 +10:00
panic.c	panic: call panic handlers before kmsg_dump	2013-09-11 15:59:30 -07:00
params.c	kernel/params: fix handling of signed integer types	2013-09-28 12:35:52 -07:00
pid_namespace.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace	2013-09-07 14:35:32 -07:00
pid.c	pidns: fix free_pid() to handle the first fork failure	2013-09-30 14:31:03 -07:00
posix-cpu-timers.c
posix-timers.c
profile.c	kernel: delete __cpuinit usage from all core kernel files	2013-07-14 19:36:59 -04:00
ptrace.c	__ptrace_may_access() should not deny sub-threads	2013-09-11 15:59:01 -07:00
range.c
rcu.h	rcu: Make call_rcu() leak callbacks for debug-object errors	2013-08-18 17:40:03 -07:00
rcupdate.c	Not much changes for the 3.12 merge window. The major tracing changes	2013-09-09 14:42:15 -07:00
rcutiny_plugin.h	rcu: Add const annotation to char * for RCU tracepoints and functions	2013-07-29 17:07:49 -04:00
rcutiny.c	rcu: Add const annotation to char * for RCU tracepoints and functions	2013-07-29 17:07:49 -04:00
rcutorture.c	rcu: Make rcutorture emit online failures if verbose	2013-08-20 11:38:45 -07:00
rcutree_plugin.h	nohz_full: Force RCU's grace-period kthreads onto timekeeping CPU	2013-08-31 14:44:02 -07:00
rcutree_trace.c
rcutree.c	Merge branches 'doc.2013.08.19a', 'fixes.2013.08.20a', 'sysidle.2013.08.31a' and 'torture.2013.08.20a' into HEAD	2013-08-31 14:44:45 -07:00
rcutree.h	nohz_full: Force RCU's grace-period kthreads onto timekeeping CPU	2013-08-31 14:44:02 -07:00
reboot.c	kernel/reboot.c: re-enable the function of variable reboot_default	2013-09-24 17:00:26 -07:00
relay.c	kernel: delete __cpuinit usage from all core kernel files	2013-07-14 19:36:59 -04:00
res_counter.c	memcg: reduce function dereference	2013-09-12 15:38:02 -07:00
resource.c
rtmutex_common.h
rtmutex-debug.c
rtmutex-debug.h
rtmutex-tester.c
rtmutex.c
rtmutex.h
rwsem.c
seccomp.c
semaphore.c
signal.c	kernel-wide: fix missing validations on __get/__put/__copy_to/__copy_from_user()	2013-09-11 15:58:18 -07:00
smp.c	kernel/smp.c: quit unconditionally enabling irqs in on_each_cpu_mask().	2013-09-11 15:58:25 -07:00
smpboot.c	kernel: delete __cpuinit usage from all core kernel files	2013-07-14 19:36:59 -04:00
smpboot.h
softirq.c	Remove GENERIC_HARDIRQ config option	2013-09-13 15:09:52 +02:00
spinlock.c	kernel/spinlock.c: add default arch_*_relax definitions for GENERIC_LOCKBREAK	2013-09-11 15:58:21 -07:00
srcu.c
stacktrace.c
stop_machine.c
sys_ni.c
sys.c	userns: Kill nsown_capable it makes the wrong thing easy	2013-08-30 23:44:11 -07:00
sysctl_binary.c
sysctl.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2013-09-12 15:01:38 -07:00
task_work.c	task_work: documentation	2013-09-11 15:58:27 -07:00
taskstats.c
test_kprobes.c
time.c
timeconst.bc
timer.c	kernel: delete __cpuinit usage from all core kernel files	2013-07-14 19:36:59 -04:00
tracepoint.c
tsacct.c
uid16.c	userns: Kill nsown_capable it makes the wrong thing easy	2013-08-30 23:44:11 -07:00
up.c	smp.h: move !SMP version of on_each_cpu() out-of-line	2013-09-11 15:58:25 -07:00
user_namespace.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace	2013-09-07 14:35:32 -07:00
user-return-notifier.c
user.c	userns: Better restrictions on when proc and sysfs can be mounted	2013-08-26 19:17:03 -07:00
utsname_sysctl.c
utsname.c	userns: Kill nsown_capable it makes the wrong thing easy	2013-08-30 23:44:11 -07:00
wait.c	kernel: fix new kernel-doc warning in wait.c	2013-08-19 09:08:54 -07:00
watchdog.c	watchdog: update watchdog_thresh properly	2013-09-24 17:00:25 -07:00
workqueue_internal.h
workqueue.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2013-09-06 09:36:28 -07:00