[merged mm-stable] media-pci-ivtv-remove-foll_force-usage.patch removed from -mm tree

[merged mm-stable] media-pci-ivtv-remove-foll_force-usage.patch removed from -mm tree

[Andrew Morton]

The quilt patch titled
     Subject: media: pci/ivtv: remove FOLL_FORCE usage
has been removed from the -mm tree.  Its filename was
     media-pci-ivtv-remove-foll_force-usage.patch

This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

------------------------------------------------------
From: David Hildenbrand <david@redhat.com>
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@redhat.com
Signed-off-by: David Hildenbrand <david@redhat.com>
Acked-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Cc: Andy Walls <awalls@md.metrocast.net>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 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@redhat.com 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