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[2/3] net/xdp: convert put_page() to put_user_page*()

Message ID 20190722043012.22945-3-jhubbard@nvidia.com
State Not Applicable
Delegated to: David Miller
Headers show
Series put_user_page: new put_user_page_dirty*() helpers | expand

Commit Message

john.hubbard@gmail.com July 22, 2019, 4:30 a.m. UTC 
From: John Hubbard <jhubbard@nvidia.com>

For pages that were retained via get_user_pages*(), release those pages
via the new put_user_page*() routines, instead of via put_page() or
release_pages().

This is part a tree-wide conversion, as described in commit fc1d8e7cca2d
("mm: introduce put_user_page*(), placeholder versions").

Cc: Björn Töpel <bjorn.topel@intel.com>
Cc: Magnus Karlsson <magnus.karlsson@intel.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: netdev@vger.kernel.org
Signed-off-by: John Hubbard <jhubbard@nvidia.com>
---
 net/xdp/xdp_umem.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

Comments

Christoph Hellwig July 22, 2019, 9:34 a.m. UTC | #1 
> diff --git a/net/xdp/xdp_umem.c b/net/xdp/xdp_umem.c
> index 83de74ca729a..9cbbb96c2a32 100644
> --- a/net/xdp/xdp_umem.c
> +++ b/net/xdp/xdp_umem.c
> @@ -171,8 +171,7 @@ static void xdp_umem_unpin_pages(struct xdp_umem *umem)
>  	for (i = 0; i < umem->npgs; i++) {
>  		struct page *page = umem->pgs[i];
>  
> -		set_page_dirty_lock(page);
> -		put_page(page);
> +		put_user_pages_dirty_lock(&page, 1);

Same here, we really should avoid the need for the loop here and
do the looping inside the helper.
diff mbox series

Patch

diff --git a/net/xdp/xdp_umem.c b/net/xdp/xdp_umem.c
index 83de74ca729a..9cbbb96c2a32 100644
--- a/net/xdp/xdp_umem.c
+++ b/net/xdp/xdp_umem.c
@@ -171,8 +171,7 @@  static void xdp_umem_unpin_pages(struct xdp_umem *umem)
 	for (i = 0; i < umem->npgs; i++) {
 		struct page *page = umem->pgs[i];
 
-		set_page_dirty_lock(page);
-		put_page(page);
+		put_user_pages_dirty_lock(&page, 1);
 	}
 
 	kfree(umem->pgs);