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proc: less LOCK/UNLOCK in remove_proc_entry()

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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>
This commit is contained in:
Alexey Dobriyan 2011-01-12 17:00:35 -08:00 committed by Linus Torvalds
parent a6fc86d2b4
commit 3740a20c4f
1 changed files with 1 additions and 4 deletions
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5
fs/proc/generic.c
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@ -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;