linux-kernel - [Patch] kbuild: fix a compile warning

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Message-Id: <20090515075229.11346.6710.sendpatchset@localhost.localdomain>
Date:	Fri, 15 May 2009 03:51:18 -0400
From:	Amerigo Wang <amwang@...hat.com>
To:	linux-kernel@...r.kernel.org
Cc:	akpm@...ux-foundation.org, Amerigo Wang <amwang@...hat.com>,
	Sam Ravnborg <sam@...nborg.org>
Subject: [Patch] kbuild: fix a compile warning


I got this warning:

 HOSTCC  scripts/basic/fixdep
scripts/basic/fixdep.c: In function 'traps':
scripts/basic/fixdep.c:377: warning: dereferencing type-punned pointer will break strict-aliasing rules
scripts/basic/fixdep.c:379: warning: dereferencing type-punned pointer will break strict-aliasing rules

Patch below fixes it.

Signed-off-by: WANG Cong <amwang@...hat.com>
Cc: Sam Ravnborg <sam@...nborg.org> 

---
diff --git a/scripts/basic/fixdep.c b/scripts/basic/fixdep.c
index 8912c0f..72c1520 100644
--- a/scripts/basic/fixdep.c
+++ b/scripts/basic/fixdep.c
@@ -373,10 +373,11 @@ void print_deps(void)
 void traps(void)
 {
 	static char test[] __attribute__((aligned(sizeof(int)))) = "CONF";
+	int *p = (int *)test;
 
-	if (*(int *)test != INT_CONF) {
+	if (*p != INT_CONF) {
 		fprintf(stderr, "fixdep: sizeof(int) != 4 or wrong endianess? %#x\n",
-			*(int *)test);
+			*p);
 		exit(2);
 	}
 }
--
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