On Thu, Oct 27, 2016 at 12:38:41PM +0800, Wanpeng Li wrote:
> From: Wanpeng Li <wanpeng.li@xxxxxxxxxxx>
>
> Add write msr notrace, it will be used by later patch.
>
> Suggested-by: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
> Suggested-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>
> Cc: Ingo Molnar <mingo@xxxxxxxxxx>
> Cc: Mike Galbraith <efault@xxxxxx>
> Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
> Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
> Cc: Paolo Bonzini <pbonzini@xxxxxxxxxx>
> Cc: Borislav Petkov <bp@xxxxxxxxx>
> Signed-off-by: Wanpeng Li <wanpeng.li@xxxxxxxxxxx>
> ---
> arch/x86/include/asm/msr.h | 14 +++++++++++++-
> 1 file changed, 13 insertions(+), 1 deletion(-)
>
> diff --git a/arch/x86/include/asm/msr.h b/arch/x86/include/asm/msr.h
> index b5fee97..eec29a7 100644
> --- a/arch/x86/include/asm/msr.h
> +++ b/arch/x86/include/asm/msr.h
> @@ -115,17 +115,29 @@ static inline unsigned long long native_read_msr_safe(unsigned int msr,
> }
>
> /* Can be uninlined because referenced by paravirt */
> -notrace static inline void native_write_msr(unsigned int msr,
> +notrace static inline void __native_write_msr_notrace(unsigned int msr,
> unsigned low, unsigned high)
^^^^^^^
Align arguments on an opening brace.
Also, please fix that in a patch ontop of this one:
WARNING: storage class should be at the beginning of the declaration
#43: FILE: arch/x86/include/asm/msr.h:118:
+notrace static inline void __native_write_msr_notrace(unsigned int msr,
WARNING: Prefer 'unsigned int' to bare use of 'unsigned'
#54: FILE: arch/x86/include/asm/msr.h:129:
+ unsigned low, unsigned high)
And because we know what those are, you can convert them directly to u32.
IOW, the end result should be something like this:
static inline void notrace
__native_write_msr_notrace(unsigned int msr, u32 low, u32 high)
And yes, I suggested using the "_notrace" suffix for the name but then
it would look funny if we end up using it in code.
So maybe we should make that lower-level helper simply:
static inline void notrace
__native_write_msr(unsigned int msr, u32 low, u32 high)
to denote that it does purely the WRMSR operation and nothing else.
Yap, that looks the cleanest to me.
Thanks.
--
Regards/Gruss,
Boris.
ECO tip #101: Trim your mails when you reply.
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