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locking/csd_lock: Explicitly inline csd_lock*() helpers 

While the compiler tends to already to it for us (except for
csd_unlock), make it explicit. These helpers mainly deal with
the ->flags, are short-lived  and can be called, for example,
from smp_call_function_many().

Signed-off-by: Davidlohr Bueso <dbueso@suse.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: dave@stgolabs.net
Link: http://lkml.kernel.org/r/1457574936-19065-2-git-send-email-dbueso@suse.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Davidlohr Bueso 2016-03-09 17:55:35 -08:00 committed by Ingo Molnar
parent 6cbe9e4a22
commit 90d1098478
1 changed files with 3 additions and 3 deletions
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6
kernel/smp.c
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@ -105,13 +105,13 @@ void __init call_function_init(void)
* previous function call. For multi-cpu calls its even more interesting
* as we'll have to ensure no other cpu is observing our csd.
*/
static void csd_lock_wait(struct call_single_data *csd)
static __always_inline void csd_lock_wait(struct call_single_data *csd)
{
while (smp_load_acquire(&csd->flags) & CSD_FLAG_LOCK)
cpu_relax();
}
static void csd_lock(struct call_single_data *csd)
static __always_inline void csd_lock(struct call_single_data *csd)
{
csd_lock_wait(csd);
csd->flags |= CSD_FLAG_LOCK;
@ -124,7 +124,7 @@ static void csd_lock(struct call_single_data *csd)
smp_wmb();
}
static void csd_unlock(struct call_single_data *csd)
static __always_inline void csd_unlock(struct call_single_data *csd)
{
WARN_ON(!(csd->flags & CSD_FLAG_LOCK));