* [PATCH V2 linux-next] scripts/coccinelle/misc/bugon.cocci: update bug_on conversion warning
@ 2015-04-09 20:58 Fabian Frederick
2015-04-15 12:22 ` Michal Marek
0 siblings, 1 reply; 2+ messages in thread
From: Fabian Frederick @ 2015-04-09 20:58 UTC (permalink / raw)
To: linux-kernel
Cc: Andrew Morton, J. Bruce Fields, Julia Lawall, Fabian Frederick,
Gilles Muller, Nicolas Palix, Michal Marek, cocci
if()/BUG conversion to BUG_ON must be avoided when there's side effect
in condition. The reason being BUG_ON won't execute the condition when CONFIG_BUG
is not defined.
Inspired-by: J. Bruce Fields <bfields@fieldses.org>
Suggested-by: Julia Lawall <Julia.Lawall@lip6.fr>
Acked-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Fabian Frederick <fabf@skynet.be>
---
V2: s/condition/the condition/
scripts/coccinelle/misc/bugon.cocci | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/scripts/coccinelle/misc/bugon.cocci b/scripts/coccinelle/misc/bugon.cocci
index 3b7eec2..27c97f1 100644
--- a/scripts/coccinelle/misc/bugon.cocci
+++ b/scripts/coccinelle/misc/bugon.cocci
@@ -57,6 +57,6 @@ coccilib.org.print_todo(p[0], "WARNING use BUG_ON")
p << r.p;
@@
-msg="WARNING: Use BUG_ON"
+msg="WARNING: Use BUG_ON instead of if condition followed by BUG.\nPlease make sure the condition has no side effects (see conditional BUG_ON definition in include/asm-generic/bug.h)"
coccilib.report.print_report(p[0], msg)
--
1.9.1
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH V2 linux-next] scripts/coccinelle/misc/bugon.cocci: update bug_on conversion warning
2015-04-09 20:58 [PATCH V2 linux-next] scripts/coccinelle/misc/bugon.cocci: update bug_on conversion warning Fabian Frederick
@ 2015-04-15 12:22 ` Michal Marek
0 siblings, 0 replies; 2+ messages in thread
From: Michal Marek @ 2015-04-15 12:22 UTC (permalink / raw)
To: Fabian Frederick, linux-kernel
Cc: Andrew Morton, J. Bruce Fields, Julia Lawall, Gilles Muller,
Nicolas Palix, cocci
On 2015-04-09 22:58, Fabian Frederick wrote:
> if()/BUG conversion to BUG_ON must be avoided when there's side effect
> in condition. The reason being BUG_ON won't execute the condition when CONFIG_BUG
> is not defined.
>
> Inspired-by: J. Bruce Fields <bfields@fieldses.org>
> Suggested-by: Julia Lawall <Julia.Lawall@lip6.fr>
> Acked-by: Julia Lawall <Julia.Lawall@lip6.fr>
> Signed-off-by: Fabian Frederick <fabf@skynet.be>
> ---
> V2: s/condition/the condition/
Applied to kbuild.git#misc.
Michal
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