linux-kernel - Re: [PATCH v2 7/8] x86/mm: only check uniform after calling mtrr_type

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Message-ID: <e380b3bb-a3d3-7d69-5fed-8deaa2dc22d1@suse.com>
Date:   Mon, 13 Feb 2023 07:08:41 +0100
From:   Juergen Gross <jgross@...e.com>
To:     "Edgecombe, Rick P" <rick.p.edgecombe@...el.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "x86@...nel.org" <x86@...nel.org>
Cc:     "peterz@...radead.org" <peterz@...radead.org>,
        "Torvalds, Linus" <torvalds@...ux-foundation.org>,
        "tglx@...utronix.de" <tglx@...utronix.de>,
        "lists@...dbynature.de" <lists@...dbynature.de>,
        "dave.hansen@...ux.intel.com" <dave.hansen@...ux.intel.com>,
        "hpa@...or.com" <hpa@...or.com>,
        "mingo@...hat.com" <mingo@...hat.com>,
        "Lutomirski, Andy" <luto@...nel.org>,
        "bp@...en8.de" <bp@...en8.de>,
        "mikelley@...rosoft.com" <mikelley@...rosoft.com>
Subject: Re: [PATCH v2 7/8] x86/mm: only check uniform after calling
 mtrr_type_lookup()

On 11.02.23 01:06, Edgecombe, Rick P wrote:
> On Thu, 2023-02-09 at 08:22 +0100, Juergen Gross wrote:
>> diff --git a/arch/x86/mm/pgtable.c b/arch/x86/mm/pgtable.c
>> index e4f499eb0f29..7b9c5443d176 100644
>> --- a/arch/x86/mm/pgtable.c
>> +++ b/arch/x86/mm/pgtable.c
>> @@ -721,8 +721,7 @@ int pud_set_huge(pud_t *pud, phys_addr_t addr,
>> pgprot_t prot)
>>          u8 mtrr, uniform;
> 
> 'mtrr' is now unused. Can it be dropped? Same for the pmd_set_huge().

I guess it will be used again, due to the comment you made for the whole
series.


Juergen

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