diff options
Diffstat (limited to 'include/linux/seqlock.h')
| -rw-r--r-- | include/linux/seqlock.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/include/linux/seqlock.h b/include/linux/seqlock.h index cc359636cfa3..f5df8f687b4d 100644 --- a/include/linux/seqlock.h +++ b/include/linux/seqlock.h @@ -456,4 +456,23 @@ read_sequnlock_excl_irqrestore(seqlock_t *sl, unsigned long flags) spin_unlock_irqrestore(&sl->lock, flags); } +static inline unsigned long +read_seqbegin_or_lock_irqsave(seqlock_t *lock, int *seq) +{ + unsigned long flags = 0; + + if (!(*seq & 1)) /* Even */ + *seq = read_seqbegin(lock); + else /* Odd */ + read_seqlock_excl_irqsave(lock, flags); + + return flags; +} + +static inline void +done_seqretry_irqrestore(seqlock_t *lock, int seq, unsigned long flags) +{ + if (seq & 1) + read_sequnlock_excl_irqrestore(lock, flags); +} #endif /* __LINUX_SEQLOCK_H */ |