sched/core: Enable might_sleep() and smp_processor_id() checks early
authorThomas Gleixner <tglx@linutronix.de>
Tue, 16 May 2017 18:42:48 +0000 (20:42 +0200)
committerIngo Molnar <mingo@kernel.org>
Tue, 23 May 2017 08:01:38 +0000 (10:01 +0200)
commit1c3c5eab171590f86edd8d31389d61dd1efe3037
tree9c44caada92823283f4de3fce475045e22d4ca2a
parent69a78ff226fe0241ab6cb9dd961667be477e3cf7
sched/core: Enable might_sleep() and smp_processor_id() checks early

might_sleep() and smp_processor_id() checks are enabled after the boot
process is done. That hides bugs in the SMP bringup and driver
initialization code.

Enable it right when the scheduler starts working, i.e. when init task and
kthreadd have been created and right before the idle task enables
preemption.

Tested-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/20170516184736.272225698@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
init/main.c
kernel/sched/core.c
lib/smp_processor_id.c