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author | NeilBrown <neilb@suse.de> | 2014-12-15 01:57:01 (GMT) |
---|---|---|
committer | NeilBrown <neilb@suse.de> | 2015-02-05 22:32:56 (GMT) |
commit | 5c47daf6e76f657d961a96d89f6419fde8eda557 (patch) | |
tree | ce0388871ccbb03e48da2b839f3e4fa4c492df56 /drivers/md/md.h | |
parent | 23da422b1951cb8dbcb7c3090057cb6d5ceedf49 (diff) | |
download | linux-5c47daf6e76f657d961a96d89f6419fde8eda557.tar.xz |
md: move mddev_lock and related to md.h
The one which is not inline (mddev_unlock) gets EXPORTed.
This makes the locking available to personality modules so that it
doesn't have to be imposed upon them.
Signed-off-by: NeilBrown <neilb@suse.de>
Diffstat (limited to 'drivers/md/md.h')
-rw-r--r-- | drivers/md/md.h | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/md/md.h b/drivers/md/md.h index 6bf3faa..14367d9 100644 --- a/drivers/md/md.h +++ b/drivers/md/md.h @@ -450,6 +450,30 @@ struct mddev { void (*sync_super)(struct mddev *mddev, struct md_rdev *rdev); }; +static inline int __must_check mddev_lock(struct mddev *mddev) +{ + return mutex_lock_interruptible(&mddev->reconfig_mutex); +} + +/* Sometimes we need to take the lock in a situation where + * failure due to interrupts is not acceptable. + */ +static inline void mddev_lock_nointr(struct mddev *mddev) +{ + mutex_lock(&mddev->reconfig_mutex); +} + +static inline int mddev_is_locked(struct mddev *mddev) +{ + return mutex_is_locked(&mddev->reconfig_mutex); +} + +static inline int mddev_trylock(struct mddev *mddev) +{ + return mutex_trylock(&mddev->reconfig_mutex); +} +extern void mddev_unlock(struct mddev *mddev); + static inline void rdev_dec_pending(struct md_rdev *rdev, struct mddev *mddev) { int faulty = test_bit(Faulty, &rdev->flags); |