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Subject[PATCH] proc: less LOCK/UNLOCK in remove_proc_entry()
For the common case, when proc entry is being removed and nobody is in
the process of using it, save LOCK/UNLOCK pair.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
---
fs/proc/generic.c | 5 +----
1 file changed, 1 insertion(+), 4 deletions(-)
--- a/fs/proc/generic.c
+++ b/fs/proc/generic.c
@@ -834,12 +834,9 @@ 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;


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