From: Rusty Russell <rusty@rustcorp.com.au>
Date: Sat, 7 Feb 2009 07:45:56 +0000 (+1030)
Subject: module: remove over-zealous check in __module_get()
X-Git-Tag: v2.6.27.16~47
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c8e7fd2807c76ec171fee6bce142cd06b5745497;p=pandora-kernel.git

module: remove over-zealous check in __module_get()

commit 7f9a50a5b89b87f8e754f59ae9968da28be618a5 upstream.

Impact: fix spurious BUG_ON() triggered under load

module_refcount() isn't reliable outside stop_machine(), as demonstrated
by Karsten Keil <kkeil@suse.de>, networking can trigger it under load
(an inc on one cpu and dec on another while module_refcount() is tallying
 can give false results, for example).

Almost noone should be using __module_get, but that's another issue.

Cc: Karsten Keil <kkeil@suse.de>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

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