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authorJeff Layton <jlayton@redhat.com>2013-04-29 16:21:21 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-04-29 18:28:41 -0700
commita66c04b4534f9b25e1241dff9a9d94dff9fd66f8 (patch)
treece3b9b76dc749a7857715813a96a3533f44e2f1d
parent398c33aaa4edb05339fed3720847ea6a06987ff1 (diff)
downloadlinux-a66c04b4534f9b25e1241dff9a9d94dff9fd66f8.tar.gz
inotify: convert inotify_add_to_idr() to use idr_alloc_cyclic()
Signed-off-by: Jeff Layton <jlayton@redhat.com> Cc: John McCutchan <john@johnmccutchan.com> Cc: Robert Love <rlove@rlove.org> Cc: Eric Paris <eparis@parisplace.org> Cc: Tejun Heo <tj@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--fs/notify/inotify/inotify_user.c8
-rw-r--r--include/linux/fsnotify_backend.h1
2 files changed, 2 insertions, 7 deletions
diff --git a/fs/notify/inotify/inotify_user.c b/fs/notify/inotify/inotify_user.c
index e0f7c1241a6..8562bd3af94 100644
--- a/fs/notify/inotify/inotify_user.c
+++ b/fs/notify/inotify/inotify_user.c
@@ -359,7 +359,6 @@ static int inotify_find_inode(const char __user *dirname, struct path *path, uns
}
static int inotify_add_to_idr(struct idr *idr, spinlock_t *idr_lock,
- int *last_wd,
struct inotify_inode_mark *i_mark)
{
int ret;
@@ -367,11 +366,10 @@ static int inotify_add_to_idr(struct idr *idr, spinlock_t *idr_lock,
idr_preload(GFP_KERNEL);
spin_lock(idr_lock);
- ret = idr_alloc(idr, i_mark, *last_wd + 1, 0, GFP_NOWAIT);
+ ret = idr_alloc_cyclic(idr, i_mark, 1, 0, GFP_NOWAIT);
if (ret >= 0) {
/* we added the mark to the idr, take a reference */
i_mark->wd = ret;
- *last_wd = i_mark->wd;
fsnotify_get_mark(&i_mark->fsn_mark);
}
@@ -638,8 +636,7 @@ static int inotify_new_watch(struct fsnotify_group *group,
if (atomic_read(&group->inotify_data.user->inotify_watches) >= inotify_max_user_watches)
goto out_err;
- ret = inotify_add_to_idr(idr, idr_lock, &group->inotify_data.last_wd,
- tmp_i_mark);
+ ret = inotify_add_to_idr(idr, idr_lock, tmp_i_mark);
if (ret)
goto out_err;
@@ -697,7 +694,6 @@ static struct fsnotify_group *inotify_new_group(unsigned int max_events)
spin_lock_init(&group->inotify_data.idr_lock);
idr_init(&group->inotify_data.idr);
- group->inotify_data.last_wd = 0;
group->inotify_data.user = get_current_user();
if (atomic_inc_return(&group->inotify_data.user->inotify_devs) >
diff --git a/include/linux/fsnotify_backend.h b/include/linux/fsnotify_backend.h
index d5b0910d496..4b2ee8d12f5 100644
--- a/include/linux/fsnotify_backend.h
+++ b/include/linux/fsnotify_backend.h
@@ -157,7 +157,6 @@ struct fsnotify_group {
struct inotify_group_private_data {
spinlock_t idr_lock;
struct idr idr;
- u32 last_wd;
struct user_struct *user;
} inotify_data;
#endif