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authorLinus Torvalds <torvalds@linux-foundation.org>2018-10-28 23:26:45 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2018-10-28 23:26:45 +0300
commit746bb4ed6d626f3f9e431a7f9b20504538e62ded (patch)
treecc2f68bca54fb36ee8c72a29013e9c094a69935e /include/linux/compiler.h
parentac747c0715f29c2be3848b719a1b7e65b07f7b21 (diff)
parent0bb95f80a38f82884693194ea720e9cca5e12ada (diff)
downloadlinux-746bb4ed6d626f3f9e431a7f9b20504538e62ded.tar.xz
Merge tag 'vla-v4.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
Pull VLA removal from Kees Cook: "Globally warn on VLA use. This turns on "-Wvla" globally now that the last few trees with their VLA removals have landed (crypto, block, net, and powerpc). Arnd mentioned that there may be a couple more VLAs hiding in hard-to-find randconfigs, but nothing big has shaken out in the last month or so in linux-next. We should be basically VLA-free now! Wheee. :) Summary: - Remove unused fallback for BUILD_BUG_ON (which technically contains a VLA) - Lift -Wvla to the top-level Makefile" * tag 'vla-v4.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux: Makefile: Globally enable VLA warning compiler.h: give up __compiletime_assert_fallback()
Diffstat (limited to 'include/linux/compiler.h')
-rw-r--r--include/linux/compiler.h17
1 files changed, 1 insertions, 16 deletions
diff --git a/include/linux/compiler.h b/include/linux/compiler.h
index 1921545c6351..4170fcee5adb 100644
--- a/include/linux/compiler.h
+++ b/include/linux/compiler.h
@@ -344,29 +344,14 @@ static inline void *offset_to_ptr(const int *off)
#endif
#ifndef __compiletime_error
# define __compiletime_error(message)
-/*
- * Sparse complains of variable sized arrays due to the temporary variable in
- * __compiletime_assert. Unfortunately we can't just expand it out to make
- * sparse see a constant array size without breaking compiletime_assert on old
- * versions of GCC (e.g. 4.2.4), so hide the array from sparse altogether.
- */
-# ifndef __CHECKER__
-# define __compiletime_error_fallback(condition) \
- do { ((void)sizeof(char[1 - 2 * condition])); } while (0)
-# endif
-#endif
-#ifndef __compiletime_error_fallback
-# define __compiletime_error_fallback(condition) do { } while (0)
#endif
#ifdef __OPTIMIZE__
# define __compiletime_assert(condition, msg, prefix, suffix) \
do { \
- int __cond = !(condition); \
extern void prefix ## suffix(void) __compiletime_error(msg); \
- if (__cond) \
+ if (!(condition)) \
prefix ## suffix(); \
- __compiletime_error_fallback(__cond); \
} while (0)
#else
# define __compiletime_assert(condition, msg, prefix, suffix) do { } while (0)