linux-kernel - Re: [PATCH v5 18/39] mm: Handle faultless write upgrades for shstk

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Message-ID: <ad7d94dd-f0aa-bf21-38c3-58ef1e9e46dc@redhat.com>
Date:   Thu, 26 Jan 2023 09:46:19 +0100
From:   David Hildenbrand <david@...hat.com>
To:     "Edgecombe, Rick P" <rick.p.edgecombe@...el.com>,
        "bsingharora@...il.com" <bsingharora@...il.com>,
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Cc:     "Yu, Yu-cheng" <yu-cheng.yu@...el.com>
Subject: Re: [PATCH v5 18/39] mm: Handle faultless write upgrades for shstk

On 26.01.23 01:59, Edgecombe, Rick P wrote:
> On Wed, 2023-01-25 at 10:43 -0800, Rick Edgecombe wrote:
>> Thanks for your comments and ideas here, I'll give the:
>> pte_t pte_mkwrite(struct vm_area_struct *vma, pte_t pte)
>> ...solution a try.
> 
> Well, it turns out there are some pte_mkwrite() callers in other arch's
> that operate on kernel memory and don't have a VMA. So it needed a new

Why not pass in NULL as VMA then and document the semantics? The less 
similarly named but slightly different functions, the better :)

-- 
Thanks,

David / dhildenb