Add the seqlock version of raw_seqcount_begin() for readers that can't wait for writers to complete their update and who can live with seqlock read acquirement failure.
Signed-off-by: Frederic Weisbecker <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Paul E. McKenney <[email protected]> Cc: John Stultz <[email protected]> Cc: Steven Rostedt <[email protected]> Cc: Don Zickus <[email protected]> --- include/linux/seqlock.h | 5 +++++ 1 files changed, 5 insertions(+), 0 deletions(-) diff --git a/include/linux/seqlock.h b/include/linux/seqlock.h index 1829905..aa845de 100644 --- a/include/linux/seqlock.h +++ b/include/linux/seqlock.h @@ -203,6 +203,11 @@ static inline unsigned read_seqbegin(const seqlock_t *sl) return read_seqcount_begin(&sl->seqcount); } +static inline unsigned raw_seqbegin(const seqlock_t *sl) +{ + return raw_seqcount_begin(&sl->seqcount); +} + static inline unsigned read_seqretry(const seqlock_t *sl, unsigned start) { return read_seqcount_retry(&sl->seqcount, start); -- 1.7.5.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
