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md: move mddev_lock and related to md.h

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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>
This commit is contained in:
NeilBrown 2014-12-15 12:57:01 +11:00
parent 23da422b19
commit 5c47daf6e7
2 changed files with 26 additions and 24 deletions
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26
drivers/md/md.c
View File

@ -590,32 +590,9 @@ static struct mddev *mddev_find(dev_t unit)
goto retry; goto retry;
} }
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);
}
static struct attribute_group md_redundancy_group; static struct attribute_group md_redundancy_group;
static void mddev_unlock(struct mddev *mddev) void mddev_unlock(struct mddev *mddev)
{ {
if (mddev->to_remove) { if (mddev->to_remove) {
/* These cannot be removed under reconfig_mutex as /* These cannot be removed under reconfig_mutex as
@ -657,6 +634,7 @@ static void mddev_unlock(struct mddev *mddev)
md_wakeup_thread(mddev->thread); md_wakeup_thread(mddev->thread);
spin_unlock(&pers_lock); spin_unlock(&pers_lock);
} }
EXPORT_SYMBOL_GPL(mddev_unlock);
static struct md_rdev *find_rdev_nr_rcu(struct mddev *mddev, int nr) static struct md_rdev *find_rdev_nr_rcu(struct mddev *mddev, int nr)
{ {

24
drivers/md/md.h
View File

@ -450,6 +450,30 @@ struct mddev {
void (*sync_super)(struct mddev *mddev, struct md_rdev *rdev); 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) static inline void rdev_dec_pending(struct md_rdev *rdev, struct mddev *mddev)
{ {
int faulty = test_bit(Faulty, &rdev->flags); int faulty = test_bit(Faulty, &rdev->flags);