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From: Christoph Hellwig <hch@lst.de>
To: Linus Torvalds <torvalds@linux-foundation.org>,
 Paul Burton <paul.burton@mips.com>, James Hogan <jhogan@kernel.org>,
 Yoshinori Sato <ysato@users.sourceforge.jp>, Rich Felker <dalias@libc.org>,
 "David S. Miller" <davem@davemloft.net>
Subject: RFC: switch the remaining architectures to use generic GUP v2
Date: Sat,  1 Jun 2019 09:49:43 +0200
Message-Id: <20190601074959.14036-1-hch@lst.de>
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Cc: linux-sh@vger.kernel.org, Andrey Konovalov <andreyknvl@google.com>,
 x86@kernel.org, linux-mips@vger.kernel.org,
 Nicholas Piggin <npiggin@gmail.com>, linux-kernel@vger.kernel.org,
 linux-mm@kvack.org, Khalid Aziz <khalid.aziz@oracle.com>,
 Paul Mackerras <paulus@samba.org>, sparclinux@vger.kernel.org,
 linuxppc-dev@lists.ozlabs.org
Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org
Sender: "Linuxppc-dev"
 <linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org>

Hi Linus and maintainers,

below is a series to switch mips, sh and sparc64 to use the generic
GUP code so that we only have one codebase to touch for further
improvements to this code.  I don't have hardware for any of these
architectures, and generally no clue about their page table
management, so handle with care.

Changes since v1:
 - fix various issues found by the build bot
 - cherry pick and use the untagged_addr helper form Andrey
 - add various refactoring patches to share more code over architectures
 - move the powerpc hugepd code to mm/gup.c and sync it with the generic
   hup semantics