AcoSail/kernel_optimize_test
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locking/percpu-rwsem: Convert to bool

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Use bool where possible.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Davidlohr Bueso <dbueso@suse.de>
Acked-by: Will Deacon <will@kernel.org>
Acked-by: Waiman Long <longman@redhat.com>
Tested-by: Juri Lelli <juri.lelli@redhat.com>
Link: https://lkml.kernel.org/r/20200131151539.984626569@infradead.org
This commit is contained in:
Peter Zijlstra 2019-10-30 20:12:37 +01:00 committed by Ingo Molnar
parent 1751060e25
commit 206c98ffbe
2 changed files with 7 additions and 7 deletions
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6
include/linux/percpu-rwsem.h
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@ -41,7 +41,7 @@ is_static struct percpu_rw_semaphore name = { \
#define DEFINE_STATIC_PERCPU_RWSEM(name) \
__DEFINE_PERCPU_RWSEM(name, static)
extern int __percpu_down_read(struct percpu_rw_semaphore *, int);
extern bool __percpu_down_read(struct percpu_rw_semaphore *, bool);
extern void __percpu_up_read(struct percpu_rw_semaphore *);
static inline void percpu_down_read(struct percpu_rw_semaphore *sem)
@ -69,9 +69,9 @@ static inline void percpu_down_read(struct percpu_rw_semaphore *sem)
preempt_enable();
}
static inline int percpu_down_read_trylock(struct percpu_rw_semaphore *sem)
static inline bool percpu_down_read_trylock(struct percpu_rw_semaphore *sem)
{
int ret = 1;
bool ret = true;
preempt_disable();
/*

8
kernel/locking/percpu-rwsem.c
View File

@ -45,7 +45,7 @@ void percpu_free_rwsem(struct percpu_rw_semaphore *sem)
}
EXPORT_SYMBOL_GPL(percpu_free_rwsem);
int __percpu_down_read(struct percpu_rw_semaphore *sem, int try)
bool __percpu_down_read(struct percpu_rw_semaphore *sem, bool try)
{
/*
* Due to having preemption disabled the decrement happens on
@ -69,7 +69,7 @@ int __percpu_down_read(struct percpu_rw_semaphore *sem, int try)
* release in percpu_up_write().
*/
if (likely(!smp_load_acquire(&sem->readers_block)))
return 1;
return true;
/*
* Per the above comment; we still have preemption disabled and
@ -78,7 +78,7 @@ int __percpu_down_read(struct percpu_rw_semaphore *sem, int try)
__percpu_up_read(sem);
if (try)
return 0;
return false;
/*
* We either call schedule() in the wait, or we'll fall through
@ -94,7 +94,7 @@ int __percpu_down_read(struct percpu_rw_semaphore *sem, int try)
__up_read(&sem->rw_sem);
preempt_disable();
return 1;
return true;
}
EXPORT_SYMBOL_GPL(__percpu_down_read);