diff options
author | Tejun Heo <tj@kernel.org> | 2022-08-28 08:04:34 +0300 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-09-01 19:08:44 +0300 |
commit | cf2dc9db93704c24f3d6d87d3bd09ae970446d1f (patch) | |
tree | 9c72ec5431b001408f50e0ba936c53f002621de4 /fs/kernfs/file.c | |
parent | b52c2379c38ffa49cbf10e30abc9dc4f9c051d41 (diff) | |
download | linux-cf2dc9db93704c24f3d6d87d3bd09ae970446d1f.tar.xz |
kernfs: Refactor kernfs_get_open_node()
Factor out commont part. This is cleaner and should help with future
changes. No functional changes.
Tested-by: Chengming Zhou <zhouchengming@bytedance.com>
Reviewed-by: Chengming Zhou <zhouchengming@bytedance.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Link: https://lore.kernel.org/r/20220828050440.734579-4-tj@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/kernfs/file.c')
-rw-r--r-- | fs/kernfs/file.c | 25 |
1 files changed, 11 insertions, 14 deletions
diff --git a/fs/kernfs/file.c b/fs/kernfs/file.c index 6437f7c7162d..7060a2a714b8 100644 --- a/fs/kernfs/file.c +++ b/fs/kernfs/file.c @@ -554,31 +554,28 @@ out_unlock: static int kernfs_get_open_node(struct kernfs_node *kn, struct kernfs_open_file *of) { - struct kernfs_open_node *on, *new_on = NULL; + struct kernfs_open_node *on; struct mutex *mutex; mutex = kernfs_open_file_mutex_lock(kn); on = kernfs_deref_open_node_locked(kn); - if (on) { - list_add_tail(&of->list, &on->files); - mutex_unlock(mutex); - return 0; - } else { + if (!on) { /* not there, initialize a new one */ - new_on = kmalloc(sizeof(*new_on), GFP_KERNEL); - if (!new_on) { + on = kmalloc(sizeof(*on), GFP_KERNEL); + if (!on) { mutex_unlock(mutex); return -ENOMEM; } - atomic_set(&new_on->event, 1); - init_waitqueue_head(&new_on->poll); - INIT_LIST_HEAD(&new_on->files); - list_add_tail(&of->list, &new_on->files); - rcu_assign_pointer(kn->attr.open, new_on); + atomic_set(&on->event, 1); + init_waitqueue_head(&on->poll); + INIT_LIST_HEAD(&on->files); + rcu_assign_pointer(kn->attr.open, on); } - mutex_unlock(mutex); + list_add_tail(&of->list, &on->files); + + mutex_unlock(mutex); return 0; } |