[CRIU] [PATCH] crtools.c: fix compilation by clang

[Tycho Andersen]

Hi Kir,

On Thu, Apr 30, 2015 at 04:25:44PM -0700, Kir Kolyshkin wrote:
> Fix the following error:
> 
> >   LINK     arch/x86/syscalls.built-in.o
> > arch/x86/crtools.c:36:20: error: unused function '__check_code_syscall'
> >       [-Werror,-Wunused-function]
> > static inline void __check_code_syscall(void)
> 
> As the function consists of a few BUILD_BUG_ONs, it gets optimized out.
> Let's add __attribute__((__used__)) so clang stops complaining.
> 
> Signed-off-by: Kir Kolyshkin <kir at openvz.org>
> ---
>  arch/x86/crtools.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/x86/crtools.c b/arch/x86/crtools.c
> index d721ac8..4e7b090 100644
> --- a/arch/x86/crtools.c
> +++ b/arch/x86/crtools.c
> @@ -33,7 +33,7 @@ const char code_syscall[] = {
>  
>  const int code_syscall_size = round_up(sizeof(code_syscall), sizeof(long));
>  
> -static inline void __check_code_syscall(void)
> +static inline __used void __check_code_syscall(void)

Isn't it actually unused? I can't find it via grep.

Tycho

>  {
>  	BUILD_BUG_ON(sizeof(code_syscall) != BUILTIN_SYSCALL_SIZE);
>  	BUILD_BUG_ON(!is_log2(sizeof(code_syscall)));
> -- 
> 1.9.3
> 
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