The patch titled
Subject: media: pci/ivtv: remove FOLL_FORCE usage
has been added to the -mm mm-unstable branch. Its filename is
media-pci-ivtv-remove-foll_force-usage.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/media-pci-ivtv-remove-foll_force-usage.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: David Hildenbrand <david@xxxxxxxxxx>
Subject: media: pci/ivtv: remove FOLL_FORCE usage
Date: Wed, 16 Nov 2022 11:26:54 +0100
FOLL_FORCE is really only for ptrace access. R/O pinning a page is
supposed to fail if the VMA misses proper access permissions (no VM_READ).
Let's just remove FOLL_FORCE usage here; there would have to be a pretty
good reason to allow arbitrary drivers to R/O pin pages in a PROT_NONE
VMA. Most probably, FOLL_FORCE usage is just some legacy leftover.
Link: https://lkml.kernel.org/r/20221116102659.70287-16-david@xxxxxxxxxx
Signed-off-by: David Hildenbrand <david@xxxxxxxxxx>
Cc: Andy Walls <awalls@xxxxxxxxxxxxxxxx>
Cc: Mauro Carvalho Chehab <mchehab@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/media/pci/ivtv/ivtv-udma.c | 2 +-
drivers/media/pci/ivtv/ivtv-yuv.c | 5 ++---
2 files changed, 3 insertions(+), 4 deletions(-)
--- a/drivers/media/pci/ivtv/ivtv-udma.c~media-pci-ivtv-remove-foll_force-usage
+++ a/drivers/media/pci/ivtv/ivtv-udma.c
@@ -115,7 +115,7 @@ int ivtv_udma_setup(struct ivtv *itv, un
/* Pin user pages for DMA Xfer */
err = pin_user_pages_unlocked(user_dma.uaddr, user_dma.page_count,
- dma->map, FOLL_FORCE);
+ dma->map, 0);
if (user_dma.page_count != err) {
IVTV_DEBUG_WARN("failed to map user pages, returned %d instead of %d\n",
--- a/drivers/media/pci/ivtv/ivtv-yuv.c~media-pci-ivtv-remove-foll_force-usage
+++ a/drivers/media/pci/ivtv/ivtv-yuv.c
@@ -63,12 +63,11 @@ static int ivtv_yuv_prep_user_dma(struct
/* Pin user pages for DMA Xfer */
y_pages = pin_user_pages_unlocked(y_dma.uaddr,
- y_dma.page_count, &dma->map[0], FOLL_FORCE);
+ y_dma.page_count, &dma->map[0], 0);
uv_pages = 0; /* silence gcc. value is set and consumed only if: */
if (y_pages == y_dma.page_count) {
uv_pages = pin_user_pages_unlocked(uv_dma.uaddr,
- uv_dma.page_count, &dma->map[y_pages],
- FOLL_FORCE);
+ uv_dma.page_count, &dma->map[y_pages], 0);
}
if (y_pages != y_dma.page_count || uv_pages != uv_dma.page_count) {
_
Patches currently in -mm which might be from david@xxxxxxxxxx are
selftests-vm-add-ksm-unmerge-tests.patch
mm-pagewalk-dont-trigger-test_walk-in-walk_page_vma.patch
selftests-vm-add-test-to-measure-madv_unmergeable-performance.patch
mm-ksm-simplify-break_ksm-to-not-rely-on-vm_fault_write.patch
mm-remove-vm_fault_write.patch
mm-ksm-fix-ksm-cow-breaking-with-userfaultfd-wp-via-fault_flag_unshare.patch
mm-pagewalk-add-walk_page_range_vma.patch
mm-ksm-convert-break_ksm-to-use-walk_page_range_vma.patch
mm-gup-remove-foll_migration.patch
mm-mprotect-minor-can_change_pte_writable-cleanups.patch
mm-huge_memory-try-avoiding-write-faults-when-changing-pmd-protection.patch
mm-mprotect-factor-out-check-whether-manual-pte-write-upgrades-are-required.patch
mm-autonuma-use-can_change_ptepmd_writable-to-replace-savedwrite.patch
mm-remove-unused-savedwrite-infrastructure.patch
selftests-vm-anon_cow-add-mprotect-optimization-tests.patch
selftests-vm-anon_cow-prepare-for-non-anonymous-cow-tests.patch
selftests-vm-cow-basic-cow-tests-for-non-anonymous-pages.patch
selftests-vm-cow-r-o-long-term-pinning-reliability-tests-for-non-anon-pages.patch
mm-add-early-fault_flag_unshare-consistency-checks.patch
mm-add-early-fault_flag_write-consistency-checks.patch
mm-rework-handling-in-do_wp_page-based-on-private-vs-shared-mappings.patch
mm-dont-call-vm_ops-huge_fault-in-wp_huge_pmd-wp_huge_pud-for-private-mappings.patch
mm-extend-fault_flag_unshare-support-to-anything-in-a-cow-mapping.patch
mm-gup-reliable-r-o-long-term-pinning-in-cow-mappings.patch
rdma-umem-remove-foll_force-usage.patch
rdma-usnic-remove-foll_force-usage.patch
rdma-siw-remove-foll_force-usage.patch
media-videobuf-dma-sg-remove-foll_force-usage.patch
drm-etnaviv-remove-foll_force-usage.patch
media-pci-ivtv-remove-foll_force-usage.patch
mm-frame-vector-remove-foll_force-usage.patch
drm-exynos-remove-foll_force-usage.patch
rdma-hw-qib-qib_user_pages-remove-foll_force-usage.patch
habanalabs-remove-foll_force-usage.patch
