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Message-Id: <20161013002020.3062-1-lstoakes@gmail.com>
Date: Thu, 13 Oct 2016 01:20:10 +0100
From: Lorenzo Stoakes <lstoakes@...il.com>
To: linux-mm@...ck.org
Cc: 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>,
adi-buildroot-devel@...ts.sourceforge.net,
ceph-devel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
intel-gfx@...ts.freedesktop.org, kvm@...r.kernel.org,
linux-alpha@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linux-cris-kernel@...s.com, linux-fbdev@...r.kernel.org,
linux-fsdevel@...r.kernel.org, linux-ia64@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-media@...r.kernel.org,
linux-mips@...ux-mips.org, linux-rdma@...r.kernel.org,
linux-s390@...r.kernel.org, linux-samsung-soc@...r.kernel.org,
linux-scsi@...r.kernel.org, linux-security-module@...r.kernel.org,
linux-sh@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
netdev@...r.kernel.org, sparclinux@...r.kernel.org, x86@...nel.org
Subject: [PATCH 00/10] mm: adjust get_user_pages* functions to explicitly pass FOLL_* flags
This patch series adjusts functions in the get_user_pages* family such that
desired FOLL_* flags are passed as an argument rather than implied by flags.
The purpose of this change is to make the use of FOLL_FORCE explicit so it is
easier to grep for and clearer to callers that this flag is being used. The use
of FOLL_FORCE is an issue as it overrides missing VM_READ/VM_WRITE flags for the
VMA whose pages we are reading from/writing to, which can result in surprising
behaviour.
The patch series came out of the discussion around commit 38e0885, which
addressed a BUG_ON() being triggered when a page was faulted in with PROT_NONE
set but having been overridden by FOLL_FORCE. do_numa_page() was run on the
assumption the page _must_ be one marked for NUMA node migration as an actual
PROT_NONE page would have been dealt with prior to this code path, however
FOLL_FORCE introduced a situation where this assumption did not hold.
See https://marc.info/?l=linux-mm&m=147585445805166 for the patch proposal.
Lorenzo Stoakes (10):
mm: remove write/force parameters from __get_user_pages_locked()
mm: remove write/force parameters from __get_user_pages_unlocked()
mm: replace get_user_pages_unlocked() write/force parameters with gup_flags
mm: replace get_user_pages_locked() write/force parameters with gup_flags
mm: replace get_vaddr_frames() write/force parameters with gup_flags
mm: replace get_user_pages() write/force parameters with gup_flags
mm: replace get_user_pages_remote() write/force parameters with gup_flags
mm: replace __access_remote_vm() write parameter with gup_flags
mm: replace access_remote_vm() write parameter with gup_flags
mm: replace access_process_vm() write parameter with gup_flags
arch/alpha/kernel/ptrace.c | 9 ++--
arch/blackfin/kernel/ptrace.c | 5 ++-
arch/cris/arch-v32/drivers/cryptocop.c | 4 +-
arch/cris/arch-v32/kernel/ptrace.c | 4 +-
arch/ia64/kernel/err_inject.c | 2 +-
arch/ia64/kernel/ptrace.c | 14 +++---
arch/m32r/kernel/ptrace.c | 15 ++++---
arch/mips/kernel/ptrace32.c | 5 ++-
arch/mips/mm/gup.c | 2 +-
arch/powerpc/kernel/ptrace32.c | 5 ++-
arch/s390/mm/gup.c | 3 +-
arch/score/kernel/ptrace.c | 10 +++--
arch/sh/mm/gup.c | 3 +-
arch/sparc/kernel/ptrace_64.c | 24 +++++++----
arch/sparc/mm/gup.c | 3 +-
arch/x86/kernel/step.c | 3 +-
arch/x86/mm/gup.c | 2 +-
arch/x86/mm/mpx.c | 5 +--
arch/x86/um/ptrace_32.c | 3 +-
arch/x86/um/ptrace_64.c | 3 +-
drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 7 ++-
drivers/gpu/drm/etnaviv/etnaviv_gem.c | 7 ++-
drivers/gpu/drm/exynos/exynos_drm_g2d.c | 3 +-
drivers/gpu/drm/i915/i915_gem_userptr.c | 6 ++-
drivers/gpu/drm/radeon/radeon_ttm.c | 3 +-
drivers/gpu/drm/via/via_dmablit.c | 4 +-
drivers/infiniband/core/umem.c | 6 ++-
drivers/infiniband/core/umem_odp.c | 7 ++-
drivers/infiniband/hw/mthca/mthca_memfree.c | 2 +-
drivers/infiniband/hw/qib/qib_user_pages.c | 3 +-
drivers/infiniband/hw/usnic/usnic_uiom.c | 5 ++-
drivers/media/pci/ivtv/ivtv-udma.c | 4 +-
drivers/media/pci/ivtv/ivtv-yuv.c | 5 ++-
drivers/media/platform/omap/omap_vout.c | 2 +-
drivers/media/v4l2-core/videobuf-dma-sg.c | 7 ++-
drivers/media/v4l2-core/videobuf2-memops.c | 6 ++-
drivers/misc/mic/scif/scif_rma.c | 3 +-
drivers/misc/sgi-gru/grufault.c | 2 +-
drivers/platform/goldfish/goldfish_pipe.c | 3 +-
drivers/rapidio/devices/rio_mport_cdev.c | 3 +-
drivers/scsi/st.c | 5 +--
.../interface/vchiq_arm/vchiq_2835_arm.c | 3 +-
.../vc04_services/interface/vchiq_arm/vchiq_arm.c | 3 +-
drivers/video/fbdev/pvr2fb.c | 4 +-
drivers/virt/fsl_hypervisor.c | 4 +-
fs/exec.c | 9 +++-
fs/proc/base.c | 19 +++++---
include/linux/mm.h | 18 ++++----
kernel/events/uprobes.c | 6 ++-
kernel/ptrace.c | 16 ++++---
mm/frame_vector.c | 9 ++--
mm/gup.c | 50 ++++++++++------------
mm/memory.c | 16 ++++---
mm/mempolicy.c | 2 +-
mm/nommu.c | 38 +++++++---------
mm/process_vm_access.c | 7 ++-
mm/util.c | 8 ++--
net/ceph/pagevec.c | 2 +-
security/tomoyo/domain.c | 2 +-
virt/kvm/async_pf.c | 3 +-
virt/kvm/kvm_main.c | 11 +++--
61 files changed, 260 insertions(+), 187 deletions(-)
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