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Message-Id: <195a99ae949c9f5cb589d2222b736ced96ec199a.1684350871.git.lstoakes@gmail.com>
Date: Wed, 17 May 2023 20:25:45 +0100
From: Lorenzo Stoakes <lstoakes@...il.com>
To: linux-mm@...ck.org, linux-kernel@...r.kernel.org,
Andrew Morton <akpm@...ux-foundation.org>
Cc: Matthew Wilcox <willy@...radead.org>,
David Hildenbrand <david@...hat.com>,
Michael Ellerman <mpe@...erman.id.au>,
Nicholas Piggin <npiggin@...il.com>,
Christophe Leroy <christophe.leroy@...roup.eu>,
Dennis Dalessandro <dennis.dalessandro@...nelisnetworks.com>,
Jason Gunthorpe <jgg@...pe.ca>,
Leon Romanovsky <leon@...nel.org>,
Christian Benvenuti <benve@...co.com>,
Nelson Escobar <neescoba@...co.com>,
Bernard Metzler <bmt@...ich.ibm.com>,
Mauro Carvalho Chehab <mchehab@...nel.org>,
"Michael S . Tsirkin" <mst@...hat.com>,
Jason Wang <jasowang@...hat.com>, Jens Axboe <axboe@...nel.dk>,
Pavel Begunkov <asml.silence@...il.com>,
Bjorn Topel <bjorn@...nel.org>,
Magnus Karlsson <magnus.karlsson@...el.com>,
Maciej Fijalkowski <maciej.fijalkowski@...el.com>,
Jonathan Lemon <jonathan.lemon@...il.com>,
"David S . Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>,
Alexei Starovoitov <ast@...nel.org>,
Daniel Borkmann <daniel@...earbox.net>,
Jesper Dangaard Brouer <hawk@...nel.org>,
John Fastabend <john.fastabend@...il.com>,
linuxppc-dev@...ts.ozlabs.org, linux-rdma@...r.kernel.org,
linux-media@...r.kernel.org,
virtualization@...ts.linux-foundation.org, kvm@...r.kernel.org,
netdev@...r.kernel.org, io-uring@...r.kernel.org,
bpf@...r.kernel.org, John Hubbard <jhubbard@...dia.com>,
Lorenzo Stoakes <lstoakes@...il.com>,
Christoph Hellwig <hch@....de>,
Sakari Ailus <sakari.ailus@...ux.intel.com>
Subject: [PATCH v6 5/6] mm/gup: remove vmas parameter from pin_user_pages()
We are now in a position where no caller of pin_user_pages() requires the
vmas parameter at all, so eliminate this parameter from the function and
all callers.
This clears the way to removing the vmas parameter from GUP altogether.
Acked-by: David Hildenbrand <david@...hat.com>
Acked-by: Dennis Dalessandro <dennis.dalessandro@...nelisnetworks.com> (for qib)
Reviewed-by: Christoph Hellwig <hch@....de>
Acked-by: Sakari Ailus <sakari.ailus@...ux.intel.com> (for drivers/media)
Signed-off-by: Lorenzo Stoakes <lstoakes@...il.com>
---
arch/powerpc/mm/book3s64/iommu_api.c | 2 +-
drivers/infiniband/hw/qib/qib_user_pages.c | 2 +-
drivers/infiniband/hw/usnic/usnic_uiom.c | 2 +-
drivers/infiniband/sw/siw/siw_mem.c | 2 +-
drivers/media/v4l2-core/videobuf-dma-sg.c | 2 +-
drivers/vdpa/vdpa_user/vduse_dev.c | 2 +-
drivers/vhost/vdpa.c | 2 +-
include/linux/mm.h | 3 +--
io_uring/rsrc.c | 2 +-
mm/gup.c | 9 +++------
mm/gup_test.c | 9 ++++-----
net/xdp/xdp_umem.c | 2 +-
12 files changed, 17 insertions(+), 22 deletions(-)
diff --git a/arch/powerpc/mm/book3s64/iommu_api.c b/arch/powerpc/mm/book3s64/iommu_api.c
index 81d7185e2ae8..d19fb1f3007d 100644
--- a/arch/powerpc/mm/book3s64/iommu_api.c
+++ b/arch/powerpc/mm/book3s64/iommu_api.c
@@ -105,7 +105,7 @@ static long mm_iommu_do_alloc(struct mm_struct *mm, unsigned long ua,
ret = pin_user_pages(ua + (entry << PAGE_SHIFT), n,
FOLL_WRITE | FOLL_LONGTERM,
- mem->hpages + entry, NULL);
+ mem->hpages + entry);
if (ret == n) {
pinned += n;
continue;
diff --git a/drivers/infiniband/hw/qib/qib_user_pages.c b/drivers/infiniband/hw/qib/qib_user_pages.c
index f693bc753b6b..1bb7507325bc 100644
--- a/drivers/infiniband/hw/qib/qib_user_pages.c
+++ b/drivers/infiniband/hw/qib/qib_user_pages.c
@@ -111,7 +111,7 @@ int qib_get_user_pages(unsigned long start_page, size_t num_pages,
ret = pin_user_pages(start_page + got * PAGE_SIZE,
num_pages - got,
FOLL_LONGTERM | FOLL_WRITE,
- p + got, NULL);
+ p + got);
if (ret < 0) {
mmap_read_unlock(current->mm);
goto bail_release;
diff --git a/drivers/infiniband/hw/usnic/usnic_uiom.c b/drivers/infiniband/hw/usnic/usnic_uiom.c
index 2a5cac2658ec..84e0f41e7dfa 100644
--- a/drivers/infiniband/hw/usnic/usnic_uiom.c
+++ b/drivers/infiniband/hw/usnic/usnic_uiom.c
@@ -140,7 +140,7 @@ static int usnic_uiom_get_pages(unsigned long addr, size_t size, int writable,
ret = pin_user_pages(cur_base,
min_t(unsigned long, npages,
PAGE_SIZE / sizeof(struct page *)),
- gup_flags, page_list, NULL);
+ gup_flags, page_list);
if (ret < 0)
goto out;
diff --git a/drivers/infiniband/sw/siw/siw_mem.c b/drivers/infiniband/sw/siw/siw_mem.c
index f51ab2ccf151..e6e25f15567d 100644
--- a/drivers/infiniband/sw/siw/siw_mem.c
+++ b/drivers/infiniband/sw/siw/siw_mem.c
@@ -422,7 +422,7 @@ struct siw_umem *siw_umem_get(u64 start, u64 len, bool writable)
umem->page_chunk[i].plist = plist;
while (nents) {
rv = pin_user_pages(first_page_va, nents, foll_flags,
- plist, NULL);
+ plist);
if (rv < 0)
goto out_sem_up;
diff --git a/drivers/media/v4l2-core/videobuf-dma-sg.c b/drivers/media/v4l2-core/videobuf-dma-sg.c
index 53001532e8e3..405b89ea1054 100644
--- a/drivers/media/v4l2-core/videobuf-dma-sg.c
+++ b/drivers/media/v4l2-core/videobuf-dma-sg.c
@@ -180,7 +180,7 @@ static int videobuf_dma_init_user_locked(struct videobuf_dmabuf *dma,
data, size, dma->nr_pages);
err = pin_user_pages(data & PAGE_MASK, dma->nr_pages, gup_flags,
- dma->pages, NULL);
+ dma->pages);
if (err != dma->nr_pages) {
dma->nr_pages = (err >= 0) ? err : 0;
diff --git a/drivers/vdpa/vdpa_user/vduse_dev.c b/drivers/vdpa/vdpa_user/vduse_dev.c
index de97e38c3b82..4d4405f058e8 100644
--- a/drivers/vdpa/vdpa_user/vduse_dev.c
+++ b/drivers/vdpa/vdpa_user/vduse_dev.c
@@ -1052,7 +1052,7 @@ static int vduse_dev_reg_umem(struct vduse_dev *dev,
goto out;
pinned = pin_user_pages(uaddr, npages, FOLL_LONGTERM | FOLL_WRITE,
- page_list, NULL);
+ page_list);
if (pinned != npages) {
ret = pinned < 0 ? pinned : -ENOMEM;
goto out;
diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
index 8c1aefc865f0..61223fcbe82b 100644
--- a/drivers/vhost/vdpa.c
+++ b/drivers/vhost/vdpa.c
@@ -983,7 +983,7 @@ static int vhost_vdpa_pa_map(struct vhost_vdpa *v,
while (npages) {
sz2pin = min_t(unsigned long, npages, list_size);
pinned = pin_user_pages(cur_base, sz2pin,
- gup_flags, page_list, NULL);
+ gup_flags, page_list);
if (sz2pin != pinned) {
if (pinned < 0) {
ret = pinned;
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 679b41ef7a6d..db09c7062965 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -2412,8 +2412,7 @@ static inline struct page *get_user_page_vma_remote(struct mm_struct *mm,
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,
- unsigned int gup_flags, struct page **pages,
- struct vm_area_struct **vmas);
+ unsigned int gup_flags, struct page **pages);
long get_user_pages_unlocked(unsigned long start, unsigned long nr_pages,
struct page **pages, unsigned int gup_flags);
long pin_user_pages_unlocked(unsigned long start, unsigned long nr_pages,
diff --git a/io_uring/rsrc.c b/io_uring/rsrc.c
index b6451f8bc5d5..b56bda46a9eb 100644
--- a/io_uring/rsrc.c
+++ b/io_uring/rsrc.c
@@ -1044,7 +1044,7 @@ struct page **io_pin_pages(unsigned long ubuf, unsigned long len, int *npages)
ret = 0;
mmap_read_lock(current->mm);
pret = pin_user_pages(ubuf, nr_pages, FOLL_WRITE | FOLL_LONGTERM,
- pages, NULL);
+ pages);
if (pret == nr_pages)
*npages = nr_pages;
else
diff --git a/mm/gup.c b/mm/gup.c
index 1493cc8dd526..36701b5f0123 100644
--- a/mm/gup.c
+++ b/mm/gup.c
@@ -3274,8 +3274,6 @@ EXPORT_SYMBOL(pin_user_pages_remote);
* @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.
*
* Nearly the same as get_user_pages(), except that FOLL_TOUCH is not set, and
* FOLL_PIN is set.
@@ -3284,15 +3282,14 @@ EXPORT_SYMBOL(pin_user_pages_remote);
* see Documentation/core-api/pin_user_pages.rst for details.
*/
long pin_user_pages(unsigned long start, unsigned long nr_pages,
- unsigned int gup_flags, struct page **pages,
- struct vm_area_struct **vmas)
+ unsigned int gup_flags, struct page **pages)
{
int locked = 1;
- if (!is_valid_gup_args(pages, vmas, NULL, &gup_flags, FOLL_PIN))
+ if (!is_valid_gup_args(pages, NULL, NULL, &gup_flags, FOLL_PIN))
return 0;
return __gup_longterm_locked(current->mm, start, nr_pages,
- pages, vmas, &locked, gup_flags);
+ pages, NULL, &locked, gup_flags);
}
EXPORT_SYMBOL(pin_user_pages);
diff --git a/mm/gup_test.c b/mm/gup_test.c
index 9ba8ea23f84e..1668ce0e0783 100644
--- a/mm/gup_test.c
+++ b/mm/gup_test.c
@@ -146,18 +146,17 @@ static int __gup_test_ioctl(unsigned int cmd,
pages + i);
break;
case PIN_BASIC_TEST:
- nr = pin_user_pages(addr, nr, gup->gup_flags, pages + i,
- NULL);
+ nr = pin_user_pages(addr, nr, gup->gup_flags, pages + i);
break;
case PIN_LONGTERM_BENCHMARK:
nr = pin_user_pages(addr, nr,
gup->gup_flags | FOLL_LONGTERM,
- pages + i, NULL);
+ pages + i);
break;
case DUMP_USER_PAGES_TEST:
if (gup->test_flags & GUP_TEST_FLAG_DUMP_PAGES_USE_PIN)
nr = pin_user_pages(addr, nr, gup->gup_flags,
- pages + i, NULL);
+ pages + i);
else
nr = get_user_pages(addr, nr, gup->gup_flags,
pages + i);
@@ -270,7 +269,7 @@ static inline int pin_longterm_test_start(unsigned long arg)
gup_flags, pages);
else
cur_pages = pin_user_pages(addr, remaining_pages,
- gup_flags, pages, NULL);
+ gup_flags, pages);
if (cur_pages < 0) {
pin_longterm_test_stop();
ret = cur_pages;
diff --git a/net/xdp/xdp_umem.c b/net/xdp/xdp_umem.c
index 02207e852d79..06cead2b8e34 100644
--- a/net/xdp/xdp_umem.c
+++ b/net/xdp/xdp_umem.c
@@ -103,7 +103,7 @@ static int xdp_umem_pin_pages(struct xdp_umem *umem, unsigned long address)
mmap_read_lock(current->mm);
npgs = pin_user_pages(address, umem->npgs,
- gup_flags | FOLL_LONGTERM, &umem->pgs[0], NULL);
+ gup_flags | FOLL_LONGTERM, &umem->pgs[0]);
mmap_read_unlock(current->mm);
if (npgs != umem->npgs) {
--
2.40.1
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