Commit-ID: 7b2a35132ad0a70902dcd2844c27ed64cda0ce9b Gitweb: http://git.kernel.org/tip/7b2a35132ad0a70902dcd2844c27ed64cda0ce9b Author: Li Zefan <lizf@xxxxxxxxxxxxxx> AuthorDate: Mon, 2 Nov 2009 08:50:52 +0800 Committer: Ingo Molnar <mingo@xxxxxxx> CommitDate: Mon, 2 Nov 2009 15:47:54 +0100 compiler: Introduce __always_unused I wrote some code which is used as compile-time checker, and the code should be elided after compile. So I need to annotate the code as "always unused", compared to "maybe unused". Signed-off-by: Li Zefan <lizf@xxxxxxxxxxxxxx> Cc: Steven Rostedt <rostedt@xxxxxxxxxxx> Cc: Frederic Weisbecker <fweisbec@xxxxxxxxx> Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> LKML-Reference: <4AEE2CEC.8040206@xxxxxxxxxxxxxx> Signed-off-by: Ingo Molnar <mingo@xxxxxxx> --- include/linux/compiler-gcc.h | 1 + include/linux/compiler.h | 4 ++++ 2 files changed, 5 insertions(+), 0 deletions(-) diff --git a/include/linux/compiler-gcc.h b/include/linux/compiler-gcc.h index a3ed7cb..73dcf80 100644 --- a/include/linux/compiler-gcc.h +++ b/include/linux/compiler-gcc.h @@ -79,6 +79,7 @@ #define noinline __attribute__((noinline)) #define __attribute_const__ __attribute__((__const__)) #define __maybe_unused __attribute__((unused)) +#define __always_unused __attribute__((unused)) #define __gcc_header(x) #x #define _gcc_header(x) __gcc_header(linux/compiler-gcc##x.h) diff --git a/include/linux/compiler.h b/include/linux/compiler.h index 04fb513..7947f4f 100644 --- a/include/linux/compiler.h +++ b/include/linux/compiler.h @@ -213,6 +213,10 @@ void ftrace_likely_update(struct ftrace_branch_data *f, int val, int expect); # define __maybe_unused /* unimplemented */ #endif +#ifndef __always_unused +# define __always_unused /* unimplemented */ +#endif + #ifndef noinline #define noinline #endif -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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