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authorKOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>2011-05-25 04:13:17 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2011-05-25 19:39:46 +0400
commit5bd7e6a30e1eb38f58f0046c0cd42dfc38e90d64 (patch)
tree9e756cacd00f37be03db48be5912459c6fd5e515 /include/linux/compiler-gcc.h
parent903c0c7cdc21f2ccb7562a7bbc70289c0c2b16ad (diff)
downloadlinux-5bd7e6a30e1eb38f58f0046c0cd42dfc38e90d64.tar.xz
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>
Diffstat (limited to 'include/linux/compiler-gcc.h')
-rw-r--r--include/linux/compiler-gcc.h4
1 files changed, 4 insertions, 0 deletions
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,