Re: [PATCH] [x86] Move cmpxchg fallbacks to a generic place

[Ingo Molnar <mingo@elte.hu>]

* Thomas Petazzoni <thomas.petazzoni@free-electrons.com> wrote:

> arch/x86/kernel/cpu/intel.c defines a few fallback functions
> (cmpxchg_*()) that are used when the CPU doesn't support cmpxchg
> and/or cmpxchg64 natively. However, while defined in an Intel-specific
> file, these functions are also used for CPUs from other vendors when
> they don't support cmpxchg and/or cmpxchg64. This breaks the
> compilation when support for Intel CPUs is disabled.
> 
> This patch moves these functions to a new
> arch/x86/kernel/cpu/cmpxchg.c file, unconditionally compiled when
> X86_32 is enabled.
> 
> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

applied both fixes to tip/x86/cpu, thanks Thomas.

I also flipped it around with the cpu-id reduction patch, so that it 
remains bisectable. The new commit IDs in -tip are:

8bfcb39: x86: make movsl_mask definition non-CPU specific
774400a: x86: move cmpxchg fallbacks to a generic place
8d02c21: x86: configuration options to compile out x86 CPU support code

	Ingo