[PATCH] apparmor: avoid -Wempty-body warning

From: Arnd Bergmann
Date: Mon Mar 22 2021 - 07:01:14 EST


From: Arnd Bergmann <arnd@xxxxxxxx>

Building with 'make W=1' shows a warning for an empty macro:

security/apparmor/label.c: In function '__label_update':
security/apparmor/label.c:2096:59: error: suggest braces around empty body in an 'else' statement [-Werror=empty-body]
2096 | AA_BUG(labels_ns(label) != labels_ns(new));

Change the macro defintion to use no_printk(), which improves
format string checking and avoids the warning.

Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
---
security/apparmor/include/lib.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/security/apparmor/include/lib.h b/security/apparmor/include/lib.h
index 7d27db740bc2..67fbb81a11f3 100644
--- a/security/apparmor/include/lib.h
+++ b/security/apparmor/include/lib.h
@@ -36,7 +36,7 @@
#define AA_BUG_FMT(X, fmt, args...) \
WARN((X), "AppArmor WARN %s: (" #X "): " fmt, __func__, ##args)
#else
-#define AA_BUG_FMT(X, fmt, args...)
+#define AA_BUG_FMT(X, fmt, args...) no_printk(fmt, ##args)
#endif

#define AA_ERROR(fmt, args...) \
--
2.29.2