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Diffstat (limited to 'fs/notify/mark.c')
-rw-r--r--fs/notify/mark.c53
1 files changed, 18 insertions, 35 deletions
diff --git a/fs/notify/mark.c b/fs/notify/mark.c
index 8175f3cd4..7115c5d7d 100644
--- a/fs/notify/mark.c
+++ b/fs/notify/mark.c
@@ -91,10 +91,14 @@
#include <linux/fsnotify_backend.h>
#include "fsnotify.h"
+#define FSNOTIFY_REAPER_DELAY (1) /* 1 jiffy */
+
struct srcu_struct fsnotify_mark_srcu;
static DEFINE_SPINLOCK(destroy_lock);
static LIST_HEAD(destroy_list);
-static DECLARE_WAIT_QUEUE_HEAD(destroy_waitq);
+
+static void fsnotify_mark_destroy(struct work_struct *work);
+static DECLARE_DELAYED_WORK(reaper_work, fsnotify_mark_destroy);
void fsnotify_get_mark(struct fsnotify_mark *mark)
{
@@ -109,7 +113,6 @@ void fsnotify_put_mark(struct fsnotify_mark *mark)
mark->free_mark(mark);
}
}
-EXPORT_SYMBOL_GPL(fsnotify_put_mark);
/* Calculate mask of events for a list of marks */
u32 fsnotify_recalc_mask(struct hlist_head *head)
@@ -190,7 +193,8 @@ void fsnotify_free_mark(struct fsnotify_mark *mark)
spin_lock(&destroy_lock);
list_add(&mark->g_list, &destroy_list);
spin_unlock(&destroy_lock);
- wake_up(&destroy_waitq);
+ queue_delayed_work(system_unbound_wq, &reaper_work,
+ FSNOTIFY_REAPER_DELAY);
/*
* Some groups like to know that marks are being freed. This is a
@@ -209,7 +213,6 @@ void fsnotify_destroy_mark(struct fsnotify_mark *mark,
mutex_unlock(&group->mark_mutex);
fsnotify_free_mark(mark);
}
-EXPORT_SYMBOL_GPL(fsnotify_destroy_mark);
void fsnotify_destroy_marks(struct hlist_head *head, spinlock_t *lock)
{
@@ -390,11 +393,11 @@ err:
spin_lock(&destroy_lock);
list_add(&mark->g_list, &destroy_list);
spin_unlock(&destroy_lock);
- wake_up(&destroy_waitq);
+ queue_delayed_work(system_unbound_wq, &reaper_work,
+ FSNOTIFY_REAPER_DELAY);
return ret;
}
-EXPORT_SYMBOL_GPL(fsnotify_add_mark);
int fsnotify_add_mark(struct fsnotify_mark *mark, struct fsnotify_group *group,
struct inode *inode, struct vfsmount *mnt, int allow_dups)
@@ -495,41 +498,21 @@ void fsnotify_init_mark(struct fsnotify_mark *mark,
atomic_set(&mark->refcnt, 1);
mark->free_mark = free_mark;
}
-EXPORT_SYMBOL_GPL(fsnotify_init_mark);
-static int fsnotify_mark_destroy(void *ignored)
+static void fsnotify_mark_destroy(struct work_struct *work)
{
struct fsnotify_mark *mark, *next;
struct list_head private_destroy_list;
- for (;;) {
- spin_lock(&destroy_lock);
- /* exchange the list head */
- list_replace_init(&destroy_list, &private_destroy_list);
- spin_unlock(&destroy_lock);
-
- synchronize_srcu(&fsnotify_mark_srcu);
+ spin_lock(&destroy_lock);
+ /* exchange the list head */
+ list_replace_init(&destroy_list, &private_destroy_list);
+ spin_unlock(&destroy_lock);
- list_for_each_entry_safe(mark, next, &private_destroy_list, g_list) {
- list_del_init(&mark->g_list);
- fsnotify_put_mark(mark);
- }
+ synchronize_srcu(&fsnotify_mark_srcu);
- wait_event_interruptible(destroy_waitq, !list_empty(&destroy_list));
+ list_for_each_entry_safe(mark, next, &private_destroy_list, g_list) {
+ list_del_init(&mark->g_list);
+ fsnotify_put_mark(mark);
}
-
- return 0;
-}
-
-static int __init fsnotify_mark_init(void)
-{
- struct task_struct *thread;
-
- thread = kthread_run(fsnotify_mark_destroy, NULL,
- "fsnotify_mark");
- if (IS_ERR(thread))
- panic("unable to start fsnotify mark destruction thread.");
-
- return 0;
}
-device_initcall(fsnotify_mark_init);