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block: make blk_iopoll_prep_sched() follow normal 0/1 return convention

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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>
This commit is contained in:
Jens Axboe 2009-08-11 08:31:14 +02:00
parent 1b379d8daf
commit d62f843b29
1 changed files with 9 additions and 2 deletions
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11
include/linux/blk-iopoll.h
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@ -18,10 +18,17 @@ enum {
IOPOLL_F_DISABLE = 1, 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) static inline int blk_iopoll_sched_prep(struct blk_iopoll *iop)
{ {
return !test_bit(IOPOLL_F_DISABLE, &iop->state) && if (!test_bit(IOPOLL_F_DISABLE, &iop->state))
!test_and_set_bit(IOPOLL_F_SCHED, &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) static inline int blk_iopoll_disable_pending(struct blk_iopoll *iop)