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| author | Jens Axboe <jens.axboe@oracle.com> | 2009-08-11 08:31:14 +0200 |
|---|---|---|
| committer | Jens Axboe <jens.axboe@oracle.com> | 2009-09-11 14:33:32 +0200 |
| commit | d62f843b295393124970d29316344150c7de009b (patch) | |
| tree | e4ed17a6e34f43a7c292e7d6f8fe64652b075dd6 /include/linux/blk-iopoll.h | |
| parent | 1b379d8daf4e981b2220f057683e35af022d45bc (diff) | |
| download | blackbird-op-linux-d62f843b295393124970d29316344150c7de009b.tar.gz blackbird-op-linux-d62f843b295393124970d29316344150c7de009b.zip | |
block: make blk_iopoll_prep_sched() follow normal 0/1 return convention
Return 0 if we successfully marked this iopoll structure as ours for
scheduling, instead of 1.
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'include/linux/blk-iopoll.h')
| -rw-r--r-- | include/linux/blk-iopoll.h | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/include/linux/blk-iopoll.h b/include/linux/blk-iopoll.h index b2e1739a2e7b..308734d3d4a2 100644 --- a/include/linux/blk-iopoll.h +++ b/include/linux/blk-iopoll.h @@ -18,10 +18,17 @@ enum { IOPOLL_F_DISABLE = 1, }; +/* + * Returns 0 if we successfully set the IOPOLL_F_SCHED bit, indicating + * that we were the first to acquire this iop for scheduling. If this iop + * is currently disabled, return "failure". + */ static inline int blk_iopoll_sched_prep(struct blk_iopoll *iop) { - return !test_bit(IOPOLL_F_DISABLE, &iop->state) && - !test_and_set_bit(IOPOLL_F_SCHED, &iop->state); + if (!test_bit(IOPOLL_F_DISABLE, &iop->state)) + return test_and_set_bit(IOPOLL_F_SCHED, &iop->state); + + return 1; } static inline int blk_iopoll_disable_pending(struct blk_iopoll *iop) |
