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xen-devel
[Xen-devel] Re: [PATCH 1/1] XEN: enlighten, use uninitialized_var(cx)
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To: |
Jiri Slaby <jirislaby@xxxxxxxxx> |
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Subject: |
[Xen-devel] Re: [PATCH 1/1] XEN: enlighten, use uninitialized_var(cx) |
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From: |
Jeremy Fitzhardinge <jeremy@xxxxxxxx> |
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Date: |
Tue, 25 Aug 2009 15:29:50 -0700 |
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Cc: |
xen-devel@xxxxxxxxxxxxxxxxxxx, jeremy@xxxxxxxxxxxxx, the arch/x86 maintainers <x86@xxxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, chrisw@xxxxxxxxxxxx, virtualization@xxxxxxxxxxxxxx, Ingo Molnar <mingo@xxxxxxxxxx> |
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Tue, 25 Aug 2009 15:30:13 -0700 |
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<1251234044-6943-1-git-send-email-jirislaby@xxxxxxxxx> |
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Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.1) Gecko/20090814 Fedora/3.0-2.6.b3.fc11 Lightning/1.0pre Thunderbird/3.0b3 |
On 08/25/09 14:00, Jiri Slaby wrote:
> To avoid a wrong compiler warning, use unitialized_var(cx) in
> xen_init_cpuid_mask.
>
> cx needn't be initialized for cpuid when ax is 1.
>
> Signed-off-by: Jiri Slaby <jirislaby@xxxxxxxxx>
> Cc: Jeremy Fitzhardinge <jeremy@xxxxxxxxxxxxx>
> Cc: Chris Wright <chrisw@xxxxxxxxxxxx>
>
Acked-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx>
> ---
> arch/x86/xen/enlighten.c | 2 +-
> 1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
> index e90540a..5ab75e2 100644
> --- a/arch/x86/xen/enlighten.c
> +++ b/arch/x86/xen/enlighten.c
> @@ -202,7 +202,7 @@ static void xen_cpuid(unsigned int *ax, unsigned int *bx,
>
> static __init void xen_init_cpuid_mask(void)
> {
> - unsigned int ax, bx, cx, dx;
> + unsigned int ax, bx, uninitialized_var(cx), dx;
>
> cpuid_leaf1_edx_mask =
> ~((1 << X86_FEATURE_MCE) | /* disable MCE */
>
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