linux-kernel - Re: [PATCH RESEND] bug: When !CONFIG_BUG, simplify WARN_ON

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Date:	Sat, 22 Feb 2014 14:36:46 -0800
From:	Josh Triplett <josh@...htriplett.org>
To:	Randy Dunlap <rdunlap@...radead.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Arnd Bergmann <arnd@...db.de>, linux-arch@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH RESEND] bug: When !CONFIG_BUG, simplify WARN_ON_ONCE and
 family

On Sat, Feb 22, 2014 at 02:31:20PM -0800, Josh Triplett wrote:
> On Sat, Feb 22, 2014 at 01:54:49PM -0800, Randy Dunlap wrote:
> > On 02/22/2014 11:23 AM, Josh Triplett wrote:
> > 
> > Hi Josh,
> > 
> > If you redo these patches, please make while(0) not look like a
> > function call, i.e., use while (0) instead.
> 
> Good catch.  Fixing in v2.

Looking at the patch, those while(0)s were all in the original code, not
introduced by my patch.  (diff claims my patch moves them, but a better
diff would have shown that I left them alone and just moved other code
above them.)

With that in mind, I didn't want to change that style issue in the same
patch, but I wrote a separate style patch to be applied on top:

----- >8 -----
>From 2a80f851b507f44142d219af3cf00555e333f4c4 Mon Sep 17 00:00:00 2001
From: Josh Triplett <josh@...htriplett.org>
Date: Sat, 22 Feb 2014 14:33:01 -0800
Subject: [PATCH] include/asm-generic/bug.h: Style fix: s/while(0)/while (0)/

Reported-by: Randy Dunlap <rdunlap@...radead.org>
Signed-off-by: Josh Triplett <josh@...htriplett.org>
---
 include/asm-generic/bug.h | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/include/asm-generic/bug.h b/include/asm-generic/bug.h
index 34223e0..5f5a277 100644
--- a/include/asm-generic/bug.h
+++ b/include/asm-generic/bug.h
@@ -52,7 +52,7 @@ struct bug_entry {
 #endif
 
 #ifndef HAVE_ARCH_BUG_ON
-#define BUG_ON(condition) do { if (unlikely(condition)) BUG(); } while(0)
+#define BUG_ON(condition) do { if (unlikely(condition)) BUG(); } while (0)
 #endif
 
 /*
@@ -138,11 +138,11 @@ extern void warn_slowpath_null(const char *file, const int line);
 
 #else /* !CONFIG_BUG */
 #ifndef HAVE_ARCH_BUG
-#define BUG() do {} while(0)
+#define BUG() do {} while (0)
 #endif
 
 #ifndef HAVE_ARCH_BUG_ON
-#define BUG_ON(condition) do { if (condition) ; } while(0)
+#define BUG_ON(condition) do { if (condition) ; } while (0)
 #endif
 
 #ifndef HAVE_ARCH_WARN_ON
-- 
1.9.0

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