[PATCH 1/7] MIPS: add unlikely() to BUG_ON()

[Coly Li <bosong.ly@taobao.com>]

Current BUG_ON() in arch/mips/include/asm/bug.h does not use unlikely(),
in order to get better branch predict result, source code should call
BUG_ON() with unlikely() explicitly. This is not a suggested method to
use BUG_ON().

This patch adds unlikely() inside BUG_ON implementation on MIPS code,
callers can use BUG_ON without explicit unlikely() now.

I have no usable MIPS hardware to build and test the fix, any test result
of this patch is welcome.

Signed-off-by: Coly Li <bosong.ly@taobao.com>
Cc: David Daney <ddaney@caviumnetworks.com>
Cc: Wang Cong <xiyou.wangcong@gmail.com>
Cc: Yong Zhang <yong.zhang0@gmail.com>
---
 arch/mips/include/asm/bug.h |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/arch/mips/include/asm/bug.h b/arch/mips/include/asm/bug.h
index 540c98a..6771c07 100644
--- a/arch/mips/include/asm/bug.h
+++ b/arch/mips/include/asm/bug.h
@@ -30,7 +30,7 @@ static inline void  __BUG_ON(unsigned long condition)
 			     : : "r" (condition), "i" (BRK_BUG));
 }
 
-#define BUG_ON(C) __BUG_ON((unsigned long)(C))
+#define BUG_ON(C) __BUG_ON((unsigned long)unlikely(C))
 
 #define HAVE_ARCH_BUG_ON
 
-- 
1.7.3.2