Convert fs/io_uring to use the new pin_user_pages() call, which sets
FOLL_PIN. Setting FOLL_PIN is now required for code that requires
tracking of pinned pages, and therefore for any code that calls
put_user_page().
In partial anticipation of this work, the io_uring code was already
calling put_user_page() instead of put_page(). Therefore, in order to
convert from the get_user_pages()/put_page() model, to the
pin_user_pages()/put_user_page() model, the only change required
here is to change get_user_pages() to pin_user_pages().
Reviewed-by: Jens Axboe <ax...@kernel.dk>
Reviewed-by: Jan Kara <j...@suse.cz>
Signed-off-by: John Hubbard <jhubb...@nvidia.com>
---
fs/io_uring.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/io_uring.c b/fs/io_uring.c
index 9b1833fedc5c..c6ff9cc7fe71 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -4539,7 +4539,7 @@ static int io_sqe_buffer_register(struct io_ring_ctx
*ctx, void __user *arg,
ret = 0;
down_read(¤t->mm->mmap_sem);
- pret = get_user_pages(ubuf, nr_pages,
+ pret = pin_user_pages(ubuf, nr_pages,
FOLL_WRITE | FOLL_LONGTERM,
pages, vmas);
if (pret == nr_pages) {
--
2.24.1
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