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

From: Thomas Gleixner <[email-masked]>
Date: Wed, 22 Oct 2025 19:05:09 +0200

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?

Thanks,

        tglx