Messages in this thread Patch in this message | | | Subject | [PATCH] do not export kernel's NULL #define to userspace | From | Lubos Lunak <> | Date | Wed, 21 Mar 2012 14:08:24 +0100 |
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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: Luboš Luňák <l.lunak@suse.cz> --- include/linux/stddef.h | 8 ++------ 1 files changed, 2 insertions(+), 6 deletions(-)
diff --git a/include/linux/stddef.h b/include/linux/stddef.h index 6a40c76..1747b67 100644 --- a/include/linux/stddef.h +++ b/include/linux/stddef.h @@ -3,14 +3,10 @@ #include <linux/compiler.h> +#ifdef __KERNEL__ + #undef NULL -#if defined(__cplusplus) -#define NULL 0 -#else #define NULL ((void *)0) -#endif - -#ifdef __KERNEL__ enum { false = 0, -- 1.7.3.4 -- Lubos Lunak l.lunak@suse.cz -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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