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io_uring: use unpin_user_pages() where appropriate

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Commit 18595c0a58 upstream.

There are a few cases of open-rolled loops around unpin_user_page(), use
the generic helper instead.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jens Axboe
2024-03-13 15:01:03 -06:00
committed by Greg Kroah-Hartman
parent 46b1b3d81a
commit 1fdb9c9eb2
1 changed files with 2 additions and 3 deletions
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io_uring/kbuf.c
+2 -3
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@@ -458,8 +458,8 @@ static int io_pin_pbuf_ring(struct io_uring_buf_reg *reg,
struct io_buffer_list *bl)
{
struct io_uring_buf_ring *br = NULL;
int nr_pages, ret, i;
struct page **pages;
int nr_pages, ret;
pages = io_pin_pages(reg->ring_addr,
flex_array_size(br, bufs, reg->ring_entries),
@@ -495,8 +495,7 @@ static int io_pin_pbuf_ring(struct io_uring_buf_reg *reg,
bl->is_mmap = 0;
return 0;
error_unpin:
for (i = 0; i < nr_pages; i++)
unpin_user_page(pages[i]);
unpin_user_pages(pages, nr_pages);
kvfree(pages);
vunmap(br);
return ret;