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[Xen-devel] Re: [PATCH] xen: xen_init_cpuid_mask: Zero cx before calling
| To: | Josh Triplett <josh@xxxxxxxxxxxxxxxx> |
|---|---|
| Subject: | [Xen-devel] Re: [PATCH] xen: xen_init_cpuid_mask: Zero cx before calling xen_cpuid |
| From: | Jeremy Fitzhardinge <jeremy@xxxxxxxx> |
| Date: | Sat, 15 Aug 2009 00:02:30 -0700 |
| Cc: | Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, Jeremy Fitzhardinge <jeremy@xxxxxxxxxxxxx> |
| Delivery-date: | Sat, 15 Aug 2009 00:03:00 -0700 |
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| In-reply-to: | <20090808201500.GA21828@feather> |
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On 08/08/09 13:15, Josh Triplett wrote:
> CPUID function 1 doesn't use cx, but xen_cpuid doesn't know that,
> resulting in this warning:
>
> arch/x86/xen/enlighten.c: In function ‘xen_start_kernel’:
> arch/x86/xen/enlighten.c:192: warning: ‘cx’ may be used uninitialized in this
> function
> arch/x86/xen/enlighten.c:205: note: ‘cx’ was declared here
>
> Set cx = 0 to avoid this warning. This seems preferable to implementing
> a xen_cpuid_nocount without the input constraint for cx, and either of
> those seem preferable to just ignoring the warning.
>
Thanks, applied.
J
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