Wanpeng Li 1ec6ec14a2 x86/smp: Add irq_enter/exit() in smp_reschedule_interrupt() ... =============================== [ INFO: suspicious RCU usage. ] 4.8.0+ #24 Not tainted ------------------------------- ./arch/x86/include/asm/msr-trace.h:47 suspicious rcu_dereference_check() usage! other info that might help us debug this: RCU used illegally from idle CPU! rcu_scheduler_active = 1, debug_locks = 0 RCU used illegally from extended quiescent state! no locks held by swapper/1/0. [<ffffffff9d492b95>] do_trace_write_msr+0x135/0x140 [<ffffffff9d06f860>] native_write_msr+0x20/0x30 [<ffffffff9d065fad>] native_apic_msr_eoi_write+0x1d/0x30 [<ffffffff9d05bd1d>] smp_reschedule_interrupt+0x1d/0x30 [<ffffffff9d8daec6>] reschedule_interrupt+0x96/0xa0 Reschedule interrupt may be called in cpu idle state. This causes lockdep check warning above. Add irq_enter/exit() in smp_reschedule_interrupt(), irq_enter() tells the RCU subsystems to end the extended quiescent state, so the following trace call in ack_APIC_irq() works correctly. Signed-off-by: Wanpeng Li <wanpeng.li@hotmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Mike Galbraith <efault@gmx.de> Link: http://lkml.kernel.org/r/1476409733-5133-1-git-send-email-wanpeng.li@hotmail.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>		2016-10-14 14:14:20 +02:00
..
boot	* Refactor the EFI memory map code into architecture neutral files	2016-09-13 20:21:55 +02:00
configs	kconfig: tinyconfig: provide whole choice blocks to avoid warnings	2016-09-01 17:52:01 -07:00
crypto	crypto: sha512-mb - fix ctx pointer	2016-08-16 17:09:43 +08:00
entry	x86/syscalls: Remove bash-isms in syscall table generator	2016-10-05 11:34:25 +02:00
events	Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2016-10-03 16:13:28 -07:00
ia32	x86/signal: Add SA_{X32,IA32}_ABI sa_flags	2016-09-14 21:28:11 +02:00
include	x86/pkeys: Make protection keys an "eager" feature	2016-10-08 12:26:44 +02:00
kernel	x86/smp: Add irq_enter/exit() in smp_reschedule_interrupt()	2016-10-14 14:14:20 +02:00
kvm	Merge branch 'linus' into x86/asm, to pick up fixes	2016-09-20 08:29:21 +02:00
lguest	lguest: Read offset of device_cap later	2016-06-10 11:39:09 +02:00
lib	x86/mce: Improve memcpy_mcsafe()	2016-09-05 11:47:31 +02:00
math-emu
mm	Merge branch 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2016-10-03 17:18:52 -07:00
net	bpf, x86: add support for constant blinding	2016-05-16 13:49:32 -04:00
oprofile	oprofile/x86: Convert x86_backtrace() to use the new unwinder	2016-09-20 08:29:34 +02:00
pci	Merge branch 'linus' into x86/asm, to pick up recent fixes	2016-09-15 08:24:53 +02:00
platform	Merge branch 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2016-10-03 17:22:25 -07:00
power	x86/asm: Get rid of __read_cr4_safe()	2016-09-30 12:40:12 +02:00
purgatory	Add sancov plugin	2016-06-07 22:57:10 +02:00
ras	x86/RAS/mce_amd_inj: Remove debugfs dir recursively on exit	2016-09-26 11:13:17 +02:00
realmode	x86/boot: Rework reserve_real_mode() to allow multiple tries	2016-08-11 11:15:01 +02:00
tools	x86/insn: Add AVX-512 support to the instruction decoder	2016-07-21 09:37:11 -03:00
um	um/Stop conflating task_struct::stack with thread_info	2016-09-15 08:25:12 +02:00
video	x86/video: Don't assume all FB devices are PCI devices	2016-03-15 11:08:26 +01:00
xen	Merge branch 'x86-boot-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2016-10-03 16:46:53 -07:00
.gitignore
Kbuild	perf/x86: Move perf_event.c ............... => x86/events/core.c	2016-02-09 10:23:49 +01:00
Kconfig	Merge branch 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2016-10-03 17:22:25 -07:00
Kconfig.cpu
Kconfig.debug	Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2016-03-15 09:32:27 -07:00
Makefile	kbuild: abort build on bad stack protector flag	2016-07-26 16:19:19 -07:00
Makefile_32.cpu
Makefile.um