From f06fd98759451876f51607f60abd74c89b141610 Mon Sep 17 00:00:00 2001 From: Jan Kara Date: Wed, 15 Mar 2017 09:33:58 +0100 Subject: [PATCH] fsnotify: Move locking into fsnotify_find_mark() Move locking of a mark list into fsnotify_find_mark(). This reduces code churn in the following patch changing lock protecting the list. Reviewed-by: Miklos Szeredi Reviewed-by: Amir Goldstein Signed-off-by: Jan Kara --- fs/notify/inode_mark.c | 8 +------- fs/notify/mark.c | 8 ++++++++ fs/notify/vfsmount_mark.c | 7 +------ 3 files changed, 10 insertions(+), 13 deletions(-) diff --git a/fs/notify/inode_mark.c b/fs/notify/inode_mark.c index 9b2f4e6..f05fc49 100644 --- a/fs/notify/inode_mark.c +++ b/fs/notify/inode_mark.c @@ -71,13 +71,7 @@ void fsnotify_clear_inode_marks_by_group(struct fsnotify_group *group) struct fsnotify_mark *fsnotify_find_inode_mark(struct fsnotify_group *group, struct inode *inode) { - struct fsnotify_mark *mark; - - spin_lock(&inode->i_lock); - mark = fsnotify_find_mark(inode->i_fsnotify_marks, group); - spin_unlock(&inode->i_lock); - - return mark; + return fsnotify_find_mark(inode->i_fsnotify_marks, group); } /** diff --git a/fs/notify/mark.c b/fs/notify/mark.c index 06faf16..0830e0a 100644 --- a/fs/notify/mark.c +++ b/fs/notify/mark.c @@ -485,16 +485,24 @@ struct fsnotify_mark *fsnotify_find_mark(struct fsnotify_mark_connector *conn, struct fsnotify_group *group) { struct fsnotify_mark *mark; + spinlock_t *lock; if (!conn) return NULL; + if (conn->flags & FSNOTIFY_OBJ_TYPE_INODE) + lock = &conn->inode->i_lock; + else + lock = &conn->mnt->mnt_root->d_lock; + spin_lock(lock); hlist_for_each_entry(mark, &conn->list, obj_list) { if (mark->group == group) { fsnotify_get_mark(mark); + spin_unlock(lock); return mark; } } + spin_unlock(lock); return NULL; } diff --git a/fs/notify/vfsmount_mark.c b/fs/notify/vfsmount_mark.c index ffe0d70..3476ee4 100644 --- a/fs/notify/vfsmount_mark.c +++ b/fs/notify/vfsmount_mark.c @@ -65,11 +65,6 @@ struct fsnotify_mark *fsnotify_find_vfsmount_mark(struct fsnotify_group *group, struct vfsmount *mnt) { struct mount *m = real_mount(mnt); - struct fsnotify_mark *mark; - spin_lock(&mnt->mnt_root->d_lock); - mark = fsnotify_find_mark(m->mnt_fsnotify_marks, group); - spin_unlock(&mnt->mnt_root->d_lock); - - return mark; + return fsnotify_find_mark(m->mnt_fsnotify_marks, group); } -- 2.7.4