netdev - Re: [PATCH v4 02/15] x86/msr: Move rdtsc{,

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Message-ID: <aBSHyo-pu7K_CfpI@gmail.com>
Date: Fri, 2 May 2025 10:52:26 +0200
From: Ingo Molnar <mingo@...nel.org>
To: "Xin Li (Intel)" <xin@...or.com>
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Subject: Re: [PATCH v4 02/15] x86/msr: Move rdtsc{,_ordered}() to <asm/tsc.h>


* Xin Li (Intel) <xin@...or.com> wrote:

> For some reason, there are some TSC-related functions in the MSR
> header even though there is a tsc.h header.
> 
> Relocate rdtsc{,_ordered}() from <asm/msr.h> to <asm/tsc.h>, and
> subsequently remove the inclusion of <asm/msr.h> in <asm/tsc.h>.
> 
> Signed-off-by: Xin Li (Intel) <xin@...or.com>
> Acked-by: Dave Hansen <dave.hansen@...ux.intel.com>
> Acked-by: Peter Zijlstra (Intel) <peterz@...radead.org>

> --- a/arch/x86/include/asm/tsc.h
> +++ b/arch/x86/include/asm/tsc.h
> @@ -7,7 +7,81 @@
>  
>  #include <asm/cpufeature.h>
>  #include <asm/processor.h>
> -#include <asm/msr.h>

Note that in the tip:x86/msr commit I've applied today I've 
intentionally delayed the removal of this header dependency, to reduce 
the probability of breaking -next today or in the near future.

We can remove that now superfluous header dependency in a future patch.

Thanks,

	Ingo