From 9a93c6686f56086fe5280a85513041bbfebf41d0 Mon Sep 17 00:00:00 2001 From: Jeff King Date: Tue, 29 Dec 2015 01:35:46 -0500 Subject: avoid shifting signed integers 31 bits We sometimes use 32-bit unsigned integers as bit-fields. It's fine to access the MSB, because it's unsigned. However, doing so as "1 << 31" is wrong, because the constant "1" is a signed int, and we shift into the sign bit, causing undefined behavior. We can fix this by using "1U" as the constant. Signed-off-by: Jeff King Signed-off-by: Junio C Hamano --- cache.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'cache.h') diff --git a/cache.h b/cache.h index 6f53962bf2..908884318c 100644 --- a/cache.h +++ b/cache.h @@ -214,7 +214,7 @@ struct cache_entry { #define CE_INTENT_TO_ADD (1 << 29) #define CE_SKIP_WORKTREE (1 << 30) /* CE_EXTENDED2 is for future extension */ -#define CE_EXTENDED2 (1 << 31) +#define CE_EXTENDED2 (1U << 31) #define CE_EXTENDED_FLAGS (CE_INTENT_TO_ADD | CE_SKIP_WORKTREE) -- cgit v1.2.3