From: Simon Glass <sjg@chromium.org>
Date: Fri, 19 May 2017 02:08:52 +0000 (-0600)
Subject: Update WARN_ON() to return a value
X-Git-Tag: v2017.07-rc1~166
X-Git-Url: https://git.sur5r.net/?a=commitdiff_plain;h=fd7029029f5fd23990fb18c1049167fdcf95104d;p=u-boot

Update WARN_ON() to return a value

In linux v4.9 this returns a value. This saves checking the warning
condition twice in some code.

Update the U-Boot version to do this also.

Signed-off-by: Simon Glass <sjg@chromium.org>
---

diff --git a/include/linux/compat.h b/include/linux/compat.h
index a43e4d6698..03f9bef0da 100644
--- a/include/linux/compat.h
+++ b/include/linux/compat.h
@@ -106,8 +106,12 @@ static inline void kmem_cache_destroy(struct kmem_cache *cachep)
 #define BUG_ON(condition) do { if (condition) BUG(); } while(0)
 #endif /* BUG */
 
-#define WARN_ON(x) if (x) {printf("WARNING in %s line %d\n" \
-				  , __FILE__, __LINE__); }
+#define WARN_ON(condition) ({						\
+	int __ret_warn_on = !!(condition);				\
+	if (unlikely(__ret_warn_on))					\
+		printf("WARNING in %s line %d\n", __FILE__, __LINE__);;	\
+	unlikely(__ret_warn_on);					\
+})
 
 #define PAGE_SIZE	4096