From: Steven Rostedt revert: seqlock-remove-unused-functions.patch Revert: Author: Thomas Gleixner Date: Sat Jul 16 18:38:22 2011 +0200 seqlock-remove-unused-functions.patch Signed-off-by: Thomas Gleixner Signed-off-by: Steven Rostedt --- include/linux/seqlock.h | 21 +++++++++++++++++++++ 1 files changed, 21 insertions(+), 0 deletions(-) diff --git a/include/linux/seqlock.h b/include/linux/seqlock.h index b990f6e..c6db9fb 100644 --- a/include/linux/seqlock.h +++ b/include/linux/seqlock.h @@ -69,6 +69,17 @@ static inline void write_sequnlock(seqlock_t *sl) spin_unlock(&sl->lock); } +static inline int write_tryseqlock(seqlock_t *sl) +{ + int ret = spin_trylock(&sl->lock); + + if (ret) { + ++sl->sequence; + smp_wmb(); + } + return ret; +} + /* Start of read calculation -- fetch last complete writer token */ static __always_inline unsigned read_seqbegin(const seqlock_t *sl) { @@ -237,4 +248,14 @@ static inline void write_seqcount_barrier(seqcount_t *s) #define write_sequnlock_bh(lock) \ do { write_sequnlock(lock); local_bh_enable(); } while(0) +#define read_seqbegin_irqsave(lock, flags) \ + ({ local_irq_save(flags); read_seqbegin(lock); }) + +#define read_seqretry_irqrestore(lock, iv, flags) \ + ({ \ + int ret = read_seqretry(lock, iv); \ + local_irq_restore(flags); \ + ret; \ + }) + #endif /* __LINUX_SEQLOCK_H */ -- 1.7.8.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/