linux-kernel - [PATCH 0/2] mm: unexport __get_user_pages

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Date:   Thu, 27 Oct 2016 10:51:39 +0100
From:   Lorenzo Stoakes <lstoakes@...il.com>
To:     linux-mm@...ck.org
Cc:     Michal Hocko <mhocko@...nel.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Jan Kara <jack@...e.cz>, Hugh Dickins <hughd@...gle.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Rik van Riel <riel@...hat.com>,
        Mel Gorman <mgorman@...hsingularity.net>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Radim Krčmář <rkrcmar@...hat.com>,
        kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-security-module@...r.kernel.org, linux-rdma@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, linux-fsdevel@...r.kernel.org
Subject: [PATCH 0/2] mm: unexport __get_user_pages_unlocked()

This patch series continues the cleanup of get_user_pages*() functions taking
advantage of the fact we can now pass gup_flags as we please.

It firstly adds an additional 'locked' parameter to get_user_pages_remote() to
allow for its callers to utilise VM_FAULT_RETRY functionality. This is necessary
as the invocation of __get_user_pages_unlocked() in process_vm_rw_single_vec()
makes use of this and no other existing higher level function would allow it to
do so.

Secondly existing callers of __get_user_pages_unlocked() are replaced with the
appropriate higher-level replacement - get_user_pages_unlocked() if the current
task and memory descriptor are referenced, or get_user_pages_remote() if other
task/memory descriptors are referenced (having acquiring mmap_sem.)

Lorenzo Stoakes (2):
  mm: add locked parameter to get_user_pages_remote()
  mm: unexport __get_user_pages_unlocked()

 drivers/gpu/drm/etnaviv/etnaviv_gem.c   |  2 +-
 drivers/gpu/drm/i915/i915_gem_userptr.c |  2 +-
 drivers/infiniband/core/umem_odp.c      |  2 +-
 fs/exec.c                               |  2 +-
 include/linux/mm.h                      |  5 +----
 kernel/events/uprobes.c                 |  4 ++--
 mm/gup.c                                | 20 ++++++++++++--------
 mm/memory.c                             |  2 +-
 mm/nommu.c                              |  7 +++----
 mm/process_vm_access.c                  | 12 ++++++++----
 security/tomoyo/domain.c                |  2 +-
 virt/kvm/async_pf.c                     | 10 +++++++---
 virt/kvm/kvm_main.c                     |  5 ++---
 13 files changed, 41 insertions(+), 34 deletions(-)