linux-kernel - [PATCH -next] jbd2: fix build when CONFIG

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Message-ID: <4E9495C8.1030200@xenotime.net>
Date:	Tue, 11 Oct 2011 12:15:20 -0700
From:	Randy Dunlap <rdunlap@...otime.net>
To:	Stephen Rothwell <sfr@...b.auug.org.au>
CC:	linux-next@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>,
	linux-ext4@...r.kernel.org, Theodore Ts'o <tytso@....edu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Arnd Bergmann <arnd@...db.de>,
	Arnaud Lacombe <lacombar@...il.com>
Subject: [PATCH -next] jbd2: fix build when CONFIG_BUG is not enabled

From: Randy Dunlap <rdunlap@...otime.net>

Fix build error when CONFIG_BUG is not enabled:

fs/jbd2/transaction.c:1175:3: error: implicit declaration of function '__WARN'

by changing __WARN() to WARN_ON(), as suggested by
Arnaud Lacombe <lacombar@...il.com>.

Signed-off-by: Randy Dunlap <rdunlap@...otime.net>
Cc: Arnd Bergmann <arnd@...db.de>
Cc: Arnaud Lacombe <lacombar@...il.com>
---

Same build error as reported on 31-AUG-2011 for
linux-next 20110830.

 fs/jbd2/transaction.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- next-2011-1011.orig/fs/jbd2/transaction.c
+++ next-2011-1011/fs/jbd2/transaction.c
@@ -27,6 +27,7 @@
 #include <linux/highmem.h>
 #include <linux/hrtimer.h>
 #include <linux/backing-dev.h>
+#include <linux/bug.h>
 #include <linux/module.h>
 
 static void __jbd2_journal_temp_unlink_buffer(struct journal_head *jh);
@@ -1171,8 +1172,7 @@ out_unlock_bh:
 	jbd_unlock_bh_state(bh);
 out:
 	JBUFFER_TRACE(jh, "exit");
-	if (ret)
-		__WARN();	/* All errors are bugs, so dump the stack */
+	WARN_ON(ret);	/* All errors are bugs, so dump the stack */
 	return ret;
 }
 
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