kbuild: fix a compile warning

gcc-4.4.1:

 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

(Apparently -fno-strict-aliasing will fix this too)

Signed-off-by: WANG Cong <amwang@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>

diff --git a/scripts/basic/fixdep.c b/scripts/basic/fixdep.c
index 8912c0f..72c1520 100644 (file)
--- 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);
        }
 }