提交 2084c24a 编写于 作者: L Lubos Lunak 提交者: Linus Torvalds

do not export kernel's NULL #define to userspace

GCC's NULL is actually __null, which allows detecting some questionable
NULL usage and warn about it.  Moreover each platform/compiler should
have its own stddef.h anyway (which is different from linux/stddef.h).

So there's no good reason to leak kernel's NULL to userspace and
override what the compiler provides.
Signed-off-by: NLuboš Luňák <l.lunak@suse.cz>
Acked-by: NArnd Bergmann <arnd@arndb.de>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
上级 668ce0ac
...@@ -3,14 +3,10 @@ ...@@ -3,14 +3,10 @@
#include <linux/compiler.h> #include <linux/compiler.h>
#ifdef __KERNEL__
#undef NULL #undef NULL
#if defined(__cplusplus)
#define NULL 0
#else
#define NULL ((void *)0) #define NULL ((void *)0)
#endif
#ifdef __KERNEL__
enum { enum {
false = 0, false = 0,
......
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