[PATCH 13/19] net/xdp: set FOLL_PIN via pin_user_pages()

[John Hubbard]

Convert net/xdp to use the new pin_longterm_pages() call, which sets
FOLL_PIN. Setting FOLL_PIN is now required for code that requires
tracking of pinned pages.

In partial anticipation of this work, the net/xdp 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().

Acked-by: Björn Töpel <bjorn.to...@intel.com>
Signed-off-by: John Hubbard <jhubb...@nvidia.com>
---
 net/xdp/xdp_umem.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/xdp/xdp_umem.c b/net/xdp/xdp_umem.c
index 3049af269fbf..d071003b5e76 100644
--- a/net/xdp/xdp_umem.c
+++ b/net/xdp/xdp_umem.c
@@ -291,7 +291,7 @@ static int xdp_umem_pin_pages(struct xdp_umem *umem)
                return -ENOMEM;
 
        down_read(&current->mm->mmap_sem);
-       npgs = get_user_pages(umem->address, umem->npgs,
+       npgs = pin_user_pages(umem->address, umem->npgs,
                              gup_flags | FOLL_LONGTERM, &umem->pgs[0], NULL);
        up_read(&current->mm->mmap_sem);
 
-- 
2.24.0