diff options
Diffstat (limited to 'ANDROID_3.4.5/fs/lockd/grace.c')
-rw-r--r-- | ANDROID_3.4.5/fs/lockd/grace.c | 59 |
1 files changed, 0 insertions, 59 deletions
diff --git a/ANDROID_3.4.5/fs/lockd/grace.c b/ANDROID_3.4.5/fs/lockd/grace.c deleted file mode 100644 index 183cc1f0..00000000 --- a/ANDROID_3.4.5/fs/lockd/grace.c +++ /dev/null @@ -1,59 +0,0 @@ -/* - * Common code for control of lockd and nfsv4 grace periods. - */ - -#include <linux/module.h> -#include <linux/lockd/bind.h> - -static LIST_HEAD(grace_list); -static DEFINE_SPINLOCK(grace_lock); - -/** - * locks_start_grace - * @lm: who this grace period is for - * - * A grace period is a period during which locks should not be given - * out. Currently grace periods are only enforced by the two lock - * managers (lockd and nfsd), using the locks_in_grace() function to - * check when they are in a grace period. - * - * This function is called to start a grace period. - */ -void locks_start_grace(struct lock_manager *lm) -{ - spin_lock(&grace_lock); - list_add(&lm->list, &grace_list); - spin_unlock(&grace_lock); -} -EXPORT_SYMBOL_GPL(locks_start_grace); - -/** - * locks_end_grace - * @lm: who this grace period is for - * - * Call this function to state that the given lock manager is ready to - * resume regular locking. The grace period will not end until all lock - * managers that called locks_start_grace() also call locks_end_grace(). - * Note that callers count on it being safe to call this more than once, - * and the second call should be a no-op. - */ -void locks_end_grace(struct lock_manager *lm) -{ - spin_lock(&grace_lock); - list_del_init(&lm->list); - spin_unlock(&grace_lock); -} -EXPORT_SYMBOL_GPL(locks_end_grace); - -/** - * locks_in_grace - * - * Lock managers call this function to determine when it is OK for them - * to answer ordinary lock requests, and when they should accept only - * lock reclaims. - */ -int locks_in_grace(void) -{ - return !list_empty(&grace_list); -} -EXPORT_SYMBOL_GPL(locks_in_grace); |