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fsnotify: Move locking into fsnotify_find_mark()

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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 <mszeredi@redhat.com>
Reviewed-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
This commit is contained in:
Jan Kara 2017-03-15 09:33:58 +01:00
parent a242677bb1
commit f06fd98759
3 changed files with 10 additions and 13 deletions
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8
fs/notify/inode_mark.c
View File

@ -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);
}
/**

8
fs/notify/mark.c
View File

@ -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;
}

7
fs/notify/vfsmount_mark.c
View File

@ -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);
}