proc: less LOCK/UNLOCK in remove_proc_entry()

For the common case where a proc entry is being removed and nobody is in
the process of using it, save a LOCK/UNLOCK pair.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 1 insertions, 4 deletions

diff --git a/fs/proc/generic.c b/fs/proc/generic.c
index d00c5af6f199..01e07f2a188f 100644
--- a/fs/proc/generic.c
+++ b/fs/proc/generic.c
@@ -826,12 +826,9 @@ void remove_proc_entry(const char *name, struct proc_dir_entry *parent)
 
                 wait_for_completion(de->pde_unload_completion);
 
-                goto continue_removing;
+                spin_lock(&de->pde_unload_lock);
         }
-        spin_unlock(&de->pde_unload_lock);
 
-continue_removing:
-        spin_lock(&de->pde_unload_lock);
         while (!list_empty(&de->pde_openers)) {
                 struct pde_opener *pdeo;