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Re: [PATCH] x86/pv: Fix Clang build with !CONFIG_PV32
- To: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- From: Roger Pau Monné <roger.pau@xxxxxxxxxx>
- Date: Tue, 5 May 2020 16:45:57 +0200
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- Cc: Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>, Wei Liu <wl@xxxxxxx>, Jan Beulich <JBeulich@xxxxxxxx>
- Delivery-date: Tue, 05 May 2020 14:46:26 +0000
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On Tue, May 05, 2020 at 03:28:10PM +0100, Andrew Cooper wrote:
> Clang 3.5 doesn't do enough dead-code-elimination to drop the compat_gdt
> reference, resulting in a linker failure:
>
> hidden symbol `per_cpu__compat_gdt' isn't defined
>
> Drop the local variable, and move evaluation of this_cpu(compat_gdt) to within
> the guarded region.
>
> Reported-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
> Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
Tested-and-reviewed-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
Thanks!
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