The patch titled
Subject: mm/gup: remove unused vmas parameter from pin_user_pages_remote()
has been added to the -mm mm-unstable branch. Its filename is
mm-gup-remove-unused-vmas-parameter-from-pin_user_pages_remote.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-gup-remove-unused-vmas-parameter-from-pin_user_pages_remote.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: Lorenzo Stoakes <lstoakes@xxxxxxxxx>
Subject: mm/gup: remove unused vmas parameter from pin_user_pages_remote()
Date: Wed, 17 May 2023 20:25:36 +0100
No invocation of pin_user_pages_remote() uses the vmas parameter, so
remove it. This forms part of a larger patch set eliminating the use of
the vmas parameters altogether.
Link: https://lkml.kernel.org/r/28f000beb81e45bf538a2aaa77c90f5482b67a32.1684350871.git.lstoakes@xxxxxxxxx
Signed-off-by: Lorenzo Stoakes <lstoakes@xxxxxxxxx>
Acked-by: David Hildenbrand <david@xxxxxxxxxx>
Reviewed-by: Jason Gunthorpe <jgg@xxxxxxxxxx>
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/iommu/iommufd/pages.c | 4 ++--
drivers/vfio/vfio_iommu_type1.c | 2 +-
include/linux/mm.h | 2 +-
kernel/trace/trace_events_user.c | 2 +-
mm/gup.c | 8 +++-----
mm/process_vm_access.c | 2 +-
6 files changed, 9 insertions(+), 11 deletions(-)
--- a/drivers/iommu/iommufd/pages.c~mm-gup-remove-unused-vmas-parameter-from-pin_user_pages_remote
+++ a/drivers/iommu/iommufd/pages.c
@@ -786,7 +786,7 @@ static int pfn_reader_user_pin(struct pf
user->locked = 1;
}
rc = pin_user_pages_remote(pages->source_mm, uptr, npages,
- user->gup_flags, user->upages, NULL,
+ user->gup_flags, user->upages,
&user->locked);
}
if (rc <= 0) {
@@ -1799,7 +1799,7 @@ static int iopt_pages_rw_page(struct iop
rc = pin_user_pages_remote(
pages->source_mm, (uintptr_t)(pages->uptr + index * PAGE_SIZE),
1, (flags & IOMMUFD_ACCESS_RW_WRITE) ? FOLL_WRITE : 0, &page,
- NULL, NULL);
+ NULL);
mmap_read_unlock(pages->source_mm);
if (rc != 1) {
if (WARN_ON(rc >= 0))
--- a/drivers/vfio/vfio_iommu_type1.c~mm-gup-remove-unused-vmas-parameter-from-pin_user_pages_remote
+++ a/drivers/vfio/vfio_iommu_type1.c
@@ -562,7 +562,7 @@ static int vaddr_get_pfns(struct mm_stru
mmap_read_lock(mm);
ret = pin_user_pages_remote(mm, vaddr, npages, flags | FOLL_LONGTERM,
- pages, NULL, NULL);
+ pages, NULL);
if (ret > 0) {
int i;
--- a/include/linux/mm.h~mm-gup-remove-unused-vmas-parameter-from-pin_user_pages_remote
+++ a/include/linux/mm.h
@@ -2380,7 +2380,7 @@ long get_user_pages_remote(struct mm_str
long pin_user_pages_remote(struct mm_struct *mm,
unsigned long start, unsigned long nr_pages,
unsigned int gup_flags, struct page **pages,
- struct vm_area_struct **vmas, int *locked);
+ int *locked);
long get_user_pages(unsigned long start, unsigned long nr_pages,
unsigned int gup_flags, struct page **pages);
long pin_user_pages(unsigned long start, unsigned long nr_pages,
--- a/kernel/trace/trace_events_user.c~mm-gup-remove-unused-vmas-parameter-from-pin_user_pages_remote
+++ a/kernel/trace/trace_events_user.c
@@ -406,7 +406,7 @@ static int user_event_enabler_write(stru
return -EBUSY;
ret = pin_user_pages_remote(mm->mm, uaddr, 1, FOLL_WRITE | FOLL_NOFAULT,
- &page, NULL, NULL);
+ &page, NULL);
if (unlikely(ret <= 0)) {
if (!fixup_fault)
--- a/mm/gup.c~mm-gup-remove-unused-vmas-parameter-from-pin_user_pages_remote
+++ a/mm/gup.c
@@ -3243,8 +3243,6 @@ EXPORT_SYMBOL_GPL(pin_user_pages_fast);
* @gup_flags: flags modifying lookup behaviour
* @pages: array that receives pointers to the pages pinned.
* Should be at least nr_pages long.
- * @vmas: array of pointers to vmas corresponding to each page.
- * Or NULL if the caller does not require them.
* @locked: pointer to lock flag indicating whether lock is held and
* subsequently whether VM_FAULT_RETRY functionality can be
* utilised. Lock must initially be held.
@@ -3259,14 +3257,14 @@ EXPORT_SYMBOL_GPL(pin_user_pages_fast);
long pin_user_pages_remote(struct mm_struct *mm,
unsigned long start, unsigned long nr_pages,
unsigned int gup_flags, struct page **pages,
- struct vm_area_struct **vmas, int *locked)
+ int *locked)
{
int local_locked = 1;
- if (!is_valid_gup_args(pages, vmas, locked, &gup_flags,
+ if (!is_valid_gup_args(pages, NULL, locked, &gup_flags,
FOLL_PIN | FOLL_TOUCH | FOLL_REMOTE))
return 0;
- return __gup_longterm_locked(mm, start, nr_pages, pages, vmas,
+ return __gup_longterm_locked(mm, start, nr_pages, pages, NULL,
locked ? locked : &local_locked,
gup_flags);
}
--- a/mm/process_vm_access.c~mm-gup-remove-unused-vmas-parameter-from-pin_user_pages_remote
+++ a/mm/process_vm_access.c
@@ -104,7 +104,7 @@ static int process_vm_rw_single_vec(unsi
mmap_read_lock(mm);
pinned_pages = pin_user_pages_remote(mm, pa, pinned_pages,
flags, process_pages,
- NULL, &locked);
+ &locked);
if (locked)
mmap_read_unlock(mm);
if (pinned_pages <= 0)
_
Patches currently in -mm which might be from lstoakes@xxxxxxxxx are
mm-mmap-separate-writenotify-and-dirty-tracking-logic.patch
mm-gup-disallow-foll_longterm-gup-nonfast-writing-to-file-backed-mappings.patch
mm-gup-disallow-foll_longterm-gup-fast-writing-to-file-backed-mappings.patch
mm-gup-add-missing-gup_must_unshare-check-to-gup_huge_pgd.patch
mm-gup-remove-unused-vmas-parameter-from-get_user_pages.patch
mm-gup-remove-unused-vmas-parameter-from-pin_user_pages_remote.patch
mm-gup-remove-vmas-parameter-from-get_user_pages_remote.patch
io_uring-rsrc-delegate-vma-file-backed-check-to-gup.patch
mm-gup-remove-vmas-parameter-from-pin_user_pages.patch
mm-gup-remove-vmas-array-from-internal-gup-functions.patch
