Subject: Re: [PATCH v3 03/10] uaccess: Add masked_user_{read/write}_access_begin

From: Thomas Gleixner <[email-masked]>
Date: Tue, 04 Nov 2025 09:01:58 +0100

On Tue, Nov 04 2025 at 07:39, Christophe Leroy wrote:
> Le 22/10/2025 à 19:05, Thomas Gleixner a écrit :
>> On Fri, Oct 17 2025 at 12:20, Christophe Leroy wrote:
>>> Allthough masked_user_access_begin() is to only be used when reading
>>> data from user at the moment, introduce masked_user_read_access_begin()
>>> and masked_user_write_access_begin() in order to match
>>> user_read_access_begin() and user_write_access_begin().
>>>
>>> That means masked_user_read_access_begin() is used when user memory is
>>> exclusively read during the window, masked_user_write_access_begin()
>>> is used when user memory is exclusively writen during the window,
>>> masked_user_access_begin() remains and is used when both reads and
>>> writes are performed during the open window. Each of them is expected
>>> to be terminated by the matching user_read_access_end(),
>>> user_write_access_end() and user_access_end().
>>>
>>> Have them default to masked_user_access_begin() when they are
>>> not defined.
>>>
>>> Signed-off-by: Christophe Leroy <[email-masked]>
>> 
>> Can we please coordinate on that vs. the scoped_access() work as this
>> nicely collides all over the place?
>
> Sure, I will rebase on top of your series.
>
> Once it is rebased, could you take the non powerpc patches in your tree ?

Sure. The current lot is at:

  git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git scoped-uaccess

Thanks,

        tglx