linux-kernel - Re: [PATCH v3 01/18] x86/tsc: Inline native_read_tsc and remove __native_read

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Date:	Wed, 17 Jun 2015 11:26:55 +0200
From:	Borislav Petkov <bp@...e.de>
To:	Andy Lutomirski <luto@...nel.org>
Cc:	x86@...nel.org, Peter Zijlstra <peterz@...radead.org>,
	John Stultz <john.stultz@...aro.org>,
	linux-kernel@...r.kernel.org, Len Brown <lenb@...nel.org>,
	Huang Rui <ray.huang@....com>,
	Denys Vlasenko <dvlasenk@...hat.com>, kvm@...r.kernel.org,
	Ralf Baechle <ralf@...ux-mips.org>
Subject: Re: [PATCH v3 01/18] x86/tsc: Inline native_read_tsc and remove
 __native_read_tsc

On Tue, Jun 16, 2015 at 05:35:49PM -0700, Andy Lutomirski wrote:
> In cdc7957d1954 ("x86: move native_read_tsc() offline"),
> native_read_tsc was moved out of line, presumably for some
> now-obsolete vDSO-related reason.  Undo it.
> 
> The entire rdtsc, shl, or sequence is only 11 bytes, and calls via
> rdtscl and similar helpers were already inlined.
> 
> Signed-off-by: Andy Lutomirski <luto@...nel.org>
> ---
>  arch/x86/entry/vdso/vclock_gettime.c  | 2 +-
>  arch/x86/include/asm/msr.h            | 8 +++-----
>  arch/x86/include/asm/pvclock.h        | 2 +-
>  arch/x86/include/asm/stackprotector.h | 2 +-
>  arch/x86/include/asm/tsc.h            | 2 +-
>  arch/x86/kernel/apb_timer.c           | 4 ++--
>  arch/x86/kernel/tsc.c                 | 6 ------
>  7 files changed, 9 insertions(+), 17 deletions(-)

Acked-by: Borislav Petkov <bp@...e.de>

-- 
Regards/Gruss,
    Boris.

ECO tip #101: Trim your mails when you reply.
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