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Miller" , Ira Weiny , Jan Kara , Jason Gunthorpe , Jens Axboe , Jonathan Corbet , =?UTF-8?q?J=C3=A9r=C3=B4me=20Glisse?= , Magnus Karlsson , Mauro Carvalho Chehab , Michael Ellerman , Michal Hocko , Mike Kravetz , Paul Mackerras , Shuah Khan , Vlastimil Babka , , , , , , , , , , , , , LKML , John Hubbard Subject: [PATCH 10/19] fs/io_uring: set FOLL_PIN via pin_user_pages() Date: Wed, 30 Oct 2019 15:49:21 -0700 Message-ID: <20191030224930.3990755-11-jhubbard@nvidia.com> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20191030224930.3990755-1-jhubbard@nvidia.com> References: <20191030224930.3990755-1-jhubbard@nvidia.com> MIME-Version: 1.0 X-NVConfidentiality: public Content-Transfer-Encoding: quoted-printable Content-Type: text/plain DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nvidia.com; s=n1; t=1572475794; bh=bbL8FR4bzETk+x2+h29SWzIPj5uQjRkW4dL7+03upow=; h=X-PGP-Universal:From:To:CC:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:MIME-Version:X-NVConfidentiality: Content-Transfer-Encoding:Content-Type; b=kR+tPouBYC0ki827JDMeuNTByE9oIS5IDkovYzuvxCfKraeRE1xhbD+GOuKjda4Em wTplOT5bMiWa8BiaEHL3DKSpG8hqxFlrmCesFeMnbUYq9P1VfB5Aknw2LfXHZadx61 XIn5Hk9/d25I2iGTdlvgsBAJtZ42RCNbPATO9yzUrOBld+IU2VDQsYVK6KL9TsCU6a YxhKY4Qm/Nq4yZ1x82Ms8dt1DPfBsg0RcS/BQFOIl5tkHUes2ShpUz9fJI0YZorwvG K9BJvrNgryOUaUnfVnmo/oNPgkf3tG6AdeuQiOhCRbBpph8T9Ytab2k7nIUs3cE6Z5 zqKFG6B2aYtEA== Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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(). Signed-off-by: John Hubbard --- fs/io_uring.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/fs/io_uring.c b/fs/io_uring.c index a30c4f622cb3..d3924b1760eb 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -3431,9 +3431,8 @@ static int io_sqe_buffer_register(struct io_ring_ctx = *ctx, void __user *arg, =20 ret =3D 0; down_read(¤t->mm->mmap_sem); - pret =3D get_user_pages(ubuf, nr_pages, - FOLL_WRITE | FOLL_LONGTERM, - pages, vmas); + pret =3D pin_longterm_pages(ubuf, nr_pages, FOLL_WRITE, pages, + vmas); if (pret =3D=3D nr_pages) { /* don't support file backed memory */ for (j =3D 0; j < nr_pages; j++) { --=20 2.23.0