Re: [PATCH v2] x86, boot: Fix word-size assumptions in has_eflag ()inline asm

From: David Rientjes
Date: Thu Jan 30 2014 - 18:01:45 EST


On Thu, 30 Jan 2014, David Woodhouse wrote:

> Commit dd78b97367bd575918204cc89107c1479d3fc1a7 ("x86, boot: Move CPU
> flags out of cpucheck") introduced ambiguous inline asm in the
> has_eflag() function. In 16-bit mode want the instruction to be
> 'pushfl', but we just say 'pushf' and hope the compiler does what we
> wanted.
>
> When building with 'clang -m16', it won't, because clang doesn't use
> the horrid '.code16gcc' hack that even 'gcc -m16' uses internally.
>
> Say what we mean and don't make the compiler make assumptions.
>
> Signed-off-by: David Woodhouse <David.Woodhouse@xxxxxxxxx>

Fixes the x86-build-for-linus build error for me, thanks!
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