diff options
Diffstat (limited to 'drivers/md/dm.c')
| -rw-r--r-- | drivers/md/dm.c | 18 |
1 files changed, 5 insertions, 13 deletions
diff --git a/drivers/md/dm.c b/drivers/md/dm.c index 71357592646a..e6b6fe03dbcf 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -538,17 +538,15 @@ static void dm_start_io_acct(struct dm_io *io, struct bio *clone) /* * Ensure IO accounting is only ever started once. - * Expect no possibility for race unless DM_TIO_IS_DUPLICATE_BIO. */ - if (!clone || - likely(!dm_tio_flagged(clone_to_tio(clone), DM_TIO_IS_DUPLICATE_BIO))) { - if (WARN_ON_ONCE(dm_io_flagged(io, DM_IO_ACCOUNTED))) - return; + if (dm_io_flagged(io, DM_IO_ACCOUNTED)) + return; + + /* Expect no possibility for race unless DM_TIO_IS_DUPLICATE_BIO. */ + if (!clone || likely(dm_tio_is_normal(clone_to_tio(clone)))) { dm_io_set_flag(io, DM_IO_ACCOUNTED); } else { unsigned long flags; - if (dm_io_flagged(io, DM_IO_ACCOUNTED)) - return; /* Can afford locking given DM_TIO_IS_DUPLICATE_BIO */ spin_lock_irqsave(&io->lock, flags); dm_io_set_flag(io, DM_IO_ACCOUNTED); @@ -923,12 +921,6 @@ static void dm_io_complete(struct dm_io *io) } } -static inline bool dm_tio_is_normal(struct dm_target_io *tio) -{ - return (dm_tio_flagged(tio, DM_TIO_INSIDE_DM_IO) && - !dm_tio_flagged(tio, DM_TIO_IS_DUPLICATE_BIO)); -} - /* * Decrements the number of outstanding ios that a bio has been * cloned into, completing the original io if necc. |