diff options
Diffstat (limited to 'fs/bcachefs/seqmutex.h')
-rw-r--r-- | fs/bcachefs/seqmutex.h | 45 |
1 files changed, 0 insertions, 45 deletions
diff --git a/fs/bcachefs/seqmutex.h b/fs/bcachefs/seqmutex.h deleted file mode 100644 index c4b3d8d3f414..000000000000 --- a/fs/bcachefs/seqmutex.h +++ /dev/null @@ -1,45 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -#ifndef _BCACHEFS_SEQMUTEX_H -#define _BCACHEFS_SEQMUTEX_H - -#include <linux/mutex.h> - -struct seqmutex { - struct mutex lock; - u32 seq; -}; - -#define seqmutex_init(_lock) mutex_init(&(_lock)->lock) - -static inline bool seqmutex_trylock(struct seqmutex *lock) -{ - return mutex_trylock(&lock->lock); -} - -static inline void seqmutex_lock(struct seqmutex *lock) -{ - mutex_lock(&lock->lock); - lock->seq++; -} - -static inline u32 seqmutex_unlock(struct seqmutex *lock) -{ - u32 seq = lock->seq; - mutex_unlock(&lock->lock); - return seq; -} - -static inline bool seqmutex_relock(struct seqmutex *lock, u32 seq) -{ - if (lock->seq != seq || !mutex_trylock(&lock->lock)) - return false; - - if (lock->seq != seq) { - mutex_unlock(&lock->lock); - return false; - } - - return true; -} - -#endif /* _BCACHEFS_SEQMUTEX_H */ |