+ mm-memoryc-use-vma_lookup-in-__access_remote_vm.patch added to -mm tree

+ mm-memoryc-use-vma_lookup-in-__access_remote_vm.patch added to -mm tree

[akpm]

The patch titled
     Subject: mm/memory.c: use vma_lookup() in __access_remote_vm()
has been added to the -mm tree.  Its filename is
     mm-memoryc-use-vma_lookup-in-__access_remote_vm.patch

This patch should soon appear at
    https://ozlabs.org/~akpm/mmots/broken-out/mm-memoryc-use-vma_lookup-in-__access_remote_vm.patch
and later at
    https://ozlabs.org/~akpm/mmotm/broken-out/mm-memoryc-use-vma_lookup-in-__access_remote_vm.patch

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------------------------------------------------------
From: Liam Howlett <liam.howlett@oracle.com>
Subject: mm/memory.c: use vma_lookup() in __access_remote_vm()

Use vma_lookup() to find the VMA at a specific address.  As vma_lookup()
will return NULL if the address is not within any VMA, the start address
no longer needs to be validated.

Link: https://lkml.kernel.org/r/20210521174745.2219620-22-Liam.Howlett@Oracle.com
Signed-off-by: Liam R. Howlett <Liam.Howlett@Oracle.com>
Reviewed-by: Laurent Dufour <ldufour@linux.ibm.com>
Acked-by: David Hildenbrand <david@redhat.com>
Acked-by: Davidlohr Bueso <dbueso@suse.de>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/memory.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/mm/memory.c~mm-memoryc-use-vma_lookup-in-__access_remote_vm
+++ a/mm/memory.c
@@ -4947,8 +4947,8 @@ int __access_remote_vm(struct mm_struct
 			 * Check if this is a VM_IO | VM_PFNMAP VMA, which
 			 * we can access using slightly different code.
 			 */
-			vma = find_vma(mm, addr);
-			if (!vma || vma->vm_start > addr)
+			vma = vma_lookup(mm, addr);
+			if (!vma)
 				break;
 			if (vma->vm_ops && vma->vm_ops->access)
 				ret = vma->vm_ops->access(vma, addr, buf,
_

Patches currently in -mm which might be from liam.howlett@oracle.com are

mm-mmap-introduce-unlock_range-for-code-cleanup.patch
mm-mmap-use-find_vma_intersection-in-do_mmap-for-overlap.patch
mm-add-vma_lookup-update-find_vma_intersection-comments.patch
drm-i915-selftests-use-vma_lookup-in-__igt_mmap.patch
arch-arc-kernel-troubleshoot-use-vma_lookup-instead-of-find_vma.patch
arch-arm64-kvm-use-vma_lookup-instead-of-find_vma_intersection.patch
arch-powerpc-kvm-book3s_hv_uvmem-use-vma_lookup-instead-of-find_vma_intersection.patch
arch-powerpc-kvm-book3s-use-vma_lookup-in-kvmppc_hv_setup_htab_rma.patch
arch-mips-kernel-traps-use-vma_lookup-instead-of-find_vma.patch
arch-m68k-kernel-sys_m68k-use-vma_lookup-in-sys_cacheflush.patch
x86-sgx-use-vma_lookup-in-sgx_encl_find.patch
virt-kvm-use-vma_lookup-instead-of-find_vma_intersection.patch
vfio-use-vma_lookup-instead-of-find_vma_intersection.patch
net-ipv5-tcp-use-vma_lookup-in-tcp_zerocopy_receive.patch
drm-amdgpu-use-vma_lookup-in-amdgpu_ttm_tt_get_user_pages.patch
media-videobuf2-use-vma_lookup-in-get_vaddr_frames.patch
misc-sgi-gru-grufault-use-vma_lookup-in-gru_find_vma.patch
kernel-events-uprobes-use-vma_lookup-in-find_active_uprobe.patch
lib-test_hmm-use-vma_lookup-in-dmirror_migrate.patch
mm-ksm-use-vma_lookup-in-find_mergeable_vma.patch
mm-migrate-use-vma_lookup-in-do_pages_stat_array.patch
mm-mremap-use-vma_lookup-in-vma_to_resize.patch
mm-memoryc-use-vma_lookup-in-__access_remote_vm.patch
mm-mempolicy-use-vma_lookup-in-__access_remote_vm.patch