From 5c47daf6e76f657d961a96d89f6419fde8eda557 Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Mon, 15 Dec 2014 12:57:01 +1100 Subject: 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 --- drivers/md/md.h | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) (limited to 'drivers/md/md.h') diff --git a/drivers/md/md.h b/drivers/md/md.h index 6bf3faa951ec..14367d919351 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); -- cgit v1.2.3