linux-kernel - Re: [PATCH v2 00/18] clean up asm/uaccess.h, kill set

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Date:   Fri, 18 Feb 2022 01:50:36 +0000
From:   Al Viro <viro@...iv.linux.org.uk>
To:     Christophe Leroy <christophe.leroy@...roup.eu>
Cc:     Arnd Bergmann <arnd@...nel.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
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Subject: Re: [PATCH v2 00/18] clean up asm/uaccess.h, kill set_fs for good

On Thu, Feb 17, 2022 at 07:20:11AM +0000, Christophe Leroy wrote:

> And we have also 
> user_access_begin()/user_read_access_begin()/user_write_access_begin() 
> which call access_ok() then do the real work. Could be made generic with 
> call to some arch specific __user_access_begin() and friends after the 
> access_ok() and eventually the might_fault().

Not a good idea, considering the fact that we do not want to invite
uses of "faster" variants...