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SubjectRe: [PATCH 04/19] powerpc/kvm: Mark variable tmp unused
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Le 22/03/2018 à 21:19, Mathieu Malaterre a écrit :
> Add gcc attribute unused to variable tmp. Fix warning treated as error with
> W=1:
>
> arch/powerpc/kernel/kvm.c:675:6: error: variable ‘tmp’ set but not used [-Werror=unused-but-set-variable]
>
> Signed-off-by: Mathieu Malaterre <malat@debian.org>
> ---
> arch/powerpc/kernel/kvm.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/powerpc/kernel/kvm.c b/arch/powerpc/kernel/kvm.c
> index 9ad37f827a97..cd3c088283f9 100644
> --- a/arch/powerpc/kernel/kvm.c
> +++ b/arch/powerpc/kernel/kvm.c
> @@ -672,7 +672,7 @@ static void kvm_use_magic_page(void)
> {
> u32 *p;
> u32 *start, *end;
> - u32 tmp;
> + u32 tmp __maybe_unused;
> u32 features;
>
> /* Tell the host to map the magic page to -4096 on all CPUs */
>

This fonction should use fault_in_pages_readable() instead of
hardcoding the verification.

Christophe

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