lkml.org 
[lkml]   [2006]   [Dec]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
SubjectRe: [patch] lock debugging: fix DEBUG_LOCKS_WARN_ON() & debug_locks_silent

* Jarek Poplawski <jarkao2@o2.pl> wrote:

> > if (unlikely(c)) { \
> > - if (debug_locks_silent || debug_locks_off()) \
> > + if (!debug_locks_silent && debug_locks_off()) \

btw., updated patch is below - the right order is to first do
debug_locks_off(), then debug_locks_silent.

[ btw., could you fix your mailer so that a reply to your mails doesnt
put all participants into the 'To:' line? You can do it via adding
"unset followup_to" to your $HOME/.muttrc file. ]

------------->
Subject: [patch] lock debugging: fix DEBUG_LOCKS_WARN_ON() & debug_locks_silent
From: Ingo Molnar <mingo@elte.hu>

Matthew Wilcox noticed that the debug_locks_silent use should be
inverted in DEBUG_LOCKS_WARN_ON(). This bug was causing spurious
stacktraces and incorrect failures in the locking self-test on the
parisc kernel.

Bug-found-by: Matthew Wilcox <matthew@wil.cx>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
include/linux/debug_locks.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

Index: linux/include/linux/debug_locks.h
===================================================================
--- linux.orig/include/linux/debug_locks.h
+++ linux/include/linux/debug_locks.h
@@ -24,7 +24,7 @@ extern int debug_locks_off(void);
int __ret = 0; \
\
if (unlikely(c)) { \
- if (debug_locks_silent || debug_locks_off()) \
+ if (debug_locks_off() && !debug_locks_silent) \
WARN_ON(1); \
__ret = 1; \
} \
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2006-12-19 10:37    [W:0.080 / U:0.608 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site