From: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Date: Wed, 25 May 2011 00:13:17 +0000 (-0700) Subject: sparse: define __must_be_array() for __CHECKER__ X-Git-Tag: firefly_0821_release~7613^2~1183 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=5bd7e6a30e1eb38f58f0046c0cd42dfc38e90d64;p=firefly-linux-kernel-4.4.55.git sparse: define __must_be_array() for __CHECKER__ commit c5e631cf65f ("ARRAY_SIZE: check for type") added __must_be_array(). But sparse can't parse this gcc extention. Now make C=2 makes following sparse errors a lot. kernel/futex.c:2699:25: error: No right hand side of '+'-expression Because __must_be_array() is used for ARRAY_SIZE() macro and it is used very widely. This patch fixes it. Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Dave Hansen <dave@linux.vnet.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> --- diff --git a/include/linux/compiler-gcc.h b/include/linux/compiler-gcc.h index cb4c1eb7778e..59e4028e833d 100644 --- a/include/linux/compiler-gcc.h +++ b/include/linux/compiler-gcc.h @@ -34,8 +34,12 @@ __asm__ ("" : "=r"(__ptr) : "0"(ptr)); \ (typeof(ptr)) (__ptr + (off)); }) +#ifdef __CHECKER__ +#define __must_be_array(arr) 0 +#else /* &a[0] degrades to a pointer: a different type from an array */ #define __must_be_array(a) BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0])) +#endif /* * Force always-inline if the user requests it so via the .config,