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env: refactor rwmutex

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All the operations on `count` are performed under the lock thus it doesn't need
to be atomic.

Signed-off-by: Michal Mielewczyk <michal.mielewczyk@intel.com>
This commit is contained in:
Michal Mielewczyk 2021-08-17 15:43:30 +02:00
parent 39bab9ad87
commit 5e4fcb62be
1 changed files with 9 additions and 9 deletions
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18
modules/cas_cache/ocf_env.h
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@ -135,14 +135,14 @@ static inline void env_mutex_destroy(env_mutex *mutex)
typedef struct {
struct mutex mutex;
atomic_t count;
uint32_t count;
struct task_struct *holder;
} env_rmutex;
static inline int env_rmutex_init(env_rmutex *rmutex)
{
mutex_init(&rmutex->mutex);
atomic_set(&rmutex->count, 0);
rmutex->count = 0;
rmutex->holder = NULL;
return 0;
}
@ -150,20 +150,20 @@ static inline int env_rmutex_init(env_rmutex *rmutex)
static inline void env_rmutex_lock(env_rmutex *rmutex)
{
if (current == rmutex->holder) {
atomic_inc(&rmutex->count);
rmutex->count++;
return;
}
mutex_lock(&rmutex->mutex);
rmutex->holder = current;
atomic_inc(&rmutex->count);
rmutex->count++;
}
static inline int env_rmutex_lock_interruptible(env_rmutex *rmutex)
{
int result = 0;
if (current == rmutex->holder) {
atomic_inc(&rmutex->count);
rmutex->count++;
return 0;
}
@ -174,7 +174,7 @@ static inline int env_rmutex_lock_interruptible(env_rmutex *rmutex)
}
rmutex->holder = current;
atomic_inc(&rmutex->count);
rmutex->count++;
return 0;
}
@ -182,7 +182,7 @@ static inline int env_rmutex_lock_interruptible(env_rmutex *rmutex)
static inline int env_rmutex_trylock(env_rmutex *rmutex)
{
if (current == rmutex->holder) {
atomic_inc(&rmutex->count);
rmutex->count++;
return 0;
}
@ -192,7 +192,7 @@ static inline int env_rmutex_trylock(env_rmutex *rmutex)
}
rmutex->holder = current;
atomic_inc(&rmutex->count);
rmutex->count++;
return 0;
}
@ -201,7 +201,7 @@ static inline void env_rmutex_unlock(env_rmutex *rmutex)
{
BUG_ON(current != rmutex->holder);
if (atomic_dec_return(&rmutex->count)) {
if (--rmutex->count) {
return;
}