Re: [RFC 1/3] lib: copy_{from,to}_user using gup & kmap_atomic()

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To: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Subject: Re: [RFC 1/3] lib: copy_{from,to}_user using gup & kmap_atomic()
From: afzal mohammed <afzal.mohd.ma@xxxxxxxxx>
Date: Sat, 13 Jun 2020 19:12:36 +0530
Cc: Arnd Bergmann <arnd@xxxxxxxx>, Russell King - ARM Linux admin <linux@xxxxxxxxxxxxxxx>, Linus Walleij <linus.walleij@xxxxxxxxxx>, "linux-kernel@xxxxxxxxxxxxxxx" <linux-kernel@xxxxxxxxxxxxxxx>, Linux-MM <linux-mm@xxxxxxxxx>, Linux ARM <linux-arm-kernel@xxxxxxxxxxxxxxxxxxx>, Nicolas Pitre <nico@xxxxxxxxxxx>, Catalin Marinas <catalin.marinas@xxxxxxx>, Will Deacon <will@xxxxxxxxxx>
In-reply-to: <20200613125615.GF23230@ZenIV.linux.org.uk>
References: <cover.1591885760.git.afzal.mohd.ma@gmail.com> <9e1de19f35e2d5e1d115c9ec3b7c3284b4a4e077.1591885760.git.afzal.mohd.ma@gmail.com> <CAK8P3a1XUJHC0kG_Qwh4D4AoxTgCL5ggHd=45yNSmzaYWLUWXw@mail.gmail.com> <20200612135538.GA13399@afzalpc> <CAK8P3a25ffh_2Y1xKDbkL2xU9nLpGbEq7j6xHdODEwUtavgdwA@mail.gmail.com> <20200613120432.GA5319@afzalpc> <20200613125126.GE23230@ZenIV.linux.org.uk> <20200613125615.GF23230@ZenIV.linux.org.uk>
User-agent: Mutt/1.9.3 (2018-01-21)

Hi,

On Sat, Jun 13, 2020 at 01:56:15PM +0100, Al Viro wrote:

> Incidentally, what about get_user()/put_user()?  _That_ is where it's
> going to really hurt...

All other uaccess routines are also planned to be added, posting only
copy_{from,to}_user() was to get early feedback (mentioned in the
cover letter)

Regards
afzal

Follow-Ups:
- Re: [RFC 1/3] lib: copy_{from,to}_user using gup & kmap_atomic()
  - From: Al Viro

References:
- [RFC 0/3] ARM: copy_{from,to}_user() for vmsplit 4g/4g
  - From: afzal mohammed
- [RFC 1/3] lib: copy_{from,to}_user using gup & kmap_atomic()
  - From: afzal mohammed
- Re: [RFC 1/3] lib: copy_{from,to}_user using gup & kmap_atomic()
  - From: Arnd Bergmann
- Re: [RFC 1/3] lib: copy_{from,to}_user using gup & kmap_atomic()
  - From: afzal mohammed
- Re: [RFC 1/3] lib: copy_{from,to}_user using gup & kmap_atomic()
  - From: Arnd Bergmann
- Re: [RFC 1/3] lib: copy_{from,to}_user using gup & kmap_atomic()
  - From: afzal mohammed
- Re: [RFC 1/3] lib: copy_{from,to}_user using gup & kmap_atomic()
  - From: Al Viro
- Re: [RFC 1/3] lib: copy_{from,to}_user using gup & kmap_atomic()
  - From: Al Viro

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