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Message-ID: <20191211025318.457113-17-jhubbard@nvidia.com> Date: Tue, 10 Dec 2019 18:53:09 -0800 From: John Hubbard <jhubbard@...dia.com> To: Andrew Morton <akpm@...ux-foundation.org> CC: Al Viro <viro@...iv.linux.org.uk>, Alex Williamson <alex.williamson@...hat.com>, Benjamin Herrenschmidt <benh@...nel.crashing.org>, Björn Töpel <bjorn.topel@...el.com>, Christoph Hellwig <hch@...radead.org>, Dan Williams <dan.j.williams@...el.com>, Daniel Vetter <daniel@...ll.ch>, Dave Chinner <david@...morbit.com>, David Airlie <airlied@...ux.ie>, "David S . Miller" <davem@...emloft.net>, Ira Weiny <ira.weiny@...el.com>, Jan Kara <jack@...e.cz>, Jason Gunthorpe <jgg@...pe.ca>, Jens Axboe <axboe@...nel.dk>, Jonathan Corbet <corbet@....net>, Jérôme Glisse <jglisse@...hat.com>, Magnus Karlsson <magnus.karlsson@...el.com>, Mauro Carvalho Chehab <mchehab@...nel.org>, Michael Ellerman <mpe@...erman.id.au>, Michal Hocko <mhocko@...e.com>, Mike Kravetz <mike.kravetz@...cle.com>, Paul Mackerras <paulus@...ba.org>, Shuah Khan <shuah@...nel.org>, Vlastimil Babka <vbabka@...e.cz>, <bpf@...r.kernel.org>, <dri-devel@...ts.freedesktop.org>, <kvm@...r.kernel.org>, <linux-block@...r.kernel.org>, <linux-doc@...r.kernel.org>, <linux-fsdevel@...r.kernel.org>, <linux-kselftest@...r.kernel.org>, <linux-media@...r.kernel.org>, <linux-rdma@...r.kernel.org>, <linuxppc-dev@...ts.ozlabs.org>, <netdev@...r.kernel.org>, <linux-mm@...ck.org>, LKML <linux-kernel@...r.kernel.org>, John Hubbard <jhubbard@...dia.com> Subject: [PATCH v9 16/25] net/xdp: set FOLL_PIN via pin_user_pages() 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.topel@...el.com> Signed-off-by: John Hubbard <jhubbard@...dia.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(¤t->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(¤t->mm->mmap_sem); -- 2.24.0
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