From: Alexey Dobriyan <adobriyan@sw.ru>
Date: Tue, 8 May 2007 07:25:49 +0000 (-0700)
Subject: proc: remove pathetic ->deleted WARN_ON
X-Git-Tag: v2.6.22-rc1~756
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=578c8183c116e623d53b05d4c79762d053c7090f;p=linux-2.6

proc: remove pathetic ->deleted WARN_ON

WARN_ON(de && de->deleted); is sooo unreliable. Why?

proc_lookup				remove_proc_entry
===========				=================
lock_kernel();
spin_lock(&proc_subdir_lock);
[find proc entry]
spin_unlock(&proc_subdir_lock);
					spin_lock(&proc_subdir_lock);
					[find proc entry]

proc_get_inode
==============
WARN_ON(de && de->deleted);			...

					if (!atomic_read(&de->count))
						free_proc_entry(de);
					else
						de->deleted = 1;

So, if you have some strange oops [1], and doesn't see this WARN_ON it means
nothing.

[1] try_module_get() of module which doesn't exist, two lines below
    should suffice, or not?

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

diff --git a/fs/proc/inode.c b/fs/proc/inode.c
index d1de637893..b8171907c8 100644
--- a/fs/proc/inode.c
+++ b/fs/proc/inode.c
@@ -146,8 +146,6 @@ struct inode *proc_get_inode(struct super_block *sb, unsigned int ino,
 {
 	struct inode * inode;
 
-	WARN_ON(de && de->deleted);
-
 	if (de != NULL && !try_module_get(de->owner))
 		goto out_mod;