Re: [PATCH] powerpc/mm: Fix KUAP warning by providing copy_from_kernel_nofault_allowed()

To: Christophe Leroy <christophe.leroy@xxxxxxxxxx>
Subject: Re: [PATCH] powerpc/mm: Fix KUAP warning by providing copy_from_kernel_nofault_allowed()
From: Christoph Hellwig <hch@xxxxxx>
Date: Sat, 5 Dec 2020 14:00:45 +0100
Cc: Christoph Hellwig <hch@xxxxxx>, Michael Ellerman <mpe@xxxxxxxxxxxxxx>, Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>, Paul Mackerras <paulus@xxxxxxxxx>, viro@xxxxxxxxxxxxxxxxxx, akpm@xxxxxxxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, linuxppc-dev@xxxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx, Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
In-reply-to: <d7a9c47a-d539-d83e-7707-6b72cbcdfe93@csgroup.eu>
References: <e559e60c43f679195bfe4c7b0a301431c6f02c7a.1607157766.git.christophe.leroy@csgroup.eu> <20201205084804.GA25452@lst.de> <0ede82c3-d4e9-6ce6-0590-6254272c3ae2@csgroup.eu> <d7a9c47a-d539-d83e-7707-6b72cbcdfe93@csgroup.eu>
User-agent: Mutt/1.5.17 (2007-11-01)

Yes, I think at this point in the release cycle the specific powerpc
fix is safer anyway.  But this screams for an eventual general solution.

References:
- [PATCH] powerpc/mm: Fix KUAP warning by providing copy_from_kernel_nofault_allowed()
  - From: Christophe Leroy
- Re: [PATCH] powerpc/mm: Fix KUAP warning by providing copy_from_kernel_nofault_allowed()
  - From: Christoph Hellwig
- Re: [PATCH] powerpc/mm: Fix KUAP warning by providing copy_from_kernel_nofault_allowed()
  - From: Christophe Leroy
- Re: [PATCH] powerpc/mm: Fix KUAP warning by providing copy_from_kernel_nofault_allowed()
  - From: Christophe Leroy