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Tue, 10 Dec 2019 18:53:30 -0800 From: John Hubbard To: Andrew Morton Subject: [PATCH v9 15/25] fs/io_uring: set FOLL_PIN via pin_user_pages() Date: Tue, 10 Dec 2019 18:53:08 -0800 Message-ID: <20191211025318.457113-16-jhubbard@nvidia.com> X-Mailer: git-send-email 2.24.0 In-Reply-To: <20191211025318.457113-1-jhubbard@nvidia.com> References: <20191211025318.457113-1-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=1576032805; bh=XZAOBQ7h8B5KuSGqfEguVKa+axV7H4s2lXE+fnR+eEc=; 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=YUagEC+z3asY0IdymFUt9hqqvtqOvneqLMijXsyHGek5MwWcr3PNirs8pX0YW16fB Vbvn+dVL+Uhf1/5TeqiWN6pbeHawVw6aTkbw85EFDrNRZz0Dw3qlA/UdPiXLIB0GIW xaRV/h7ylwxMEIAQgfFZ5a7oPIZA7Tf50NLEGLASw8Xs1P4Td8mgWJjhnD526whBT/ HxakBCAF9a7DyTohhnGrUo2uMWx9wPJsW5CY/DVkZPdqAihn8buUQJsWOn1fqofYlz cySIRPh8NaQX2Y5bQ9FcGCHrFWto9gNZZSyg/6f25C4wOcnKMeDFn7RefUYR5R1++1 Z0Z0QIeuZ0RuQ== X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Michal Hocko , Jan Kara , kvm@vger.kernel.org, linux-doc@vger.kernel.org, David Airlie , Dave Chinner , dri-devel@lists.freedesktop.org, LKML , linux-mm@kvack.org, Paul Mackerras , linux-kselftest@vger.kernel.org, Ira Weiny , Jonathan Corbet , linux-rdma@vger.kernel.org, Christoph Hellwig , Jason Gunthorpe , Vlastimil Babka , =?UTF-8?q?Bj=C3=B6rn=20T=C3=B6pel?= , linux-media@vger.kernel.org, Shuah Khan , John Hubbard , linux-block@vger.kernel.org, =?UTF-8?q?J=C3=A9r=C3=B4me=20Glisse?= , Al Viro , Dan Williams , Mauro Carvalho Chehab , Magnus Karlsson , Jens Axboe , netdev@vger.kernel.org, Alex Williamson , Daniel Vetter , linux-fsdevel@vger.kernel.org, bpf@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, "David S . Miller" , Mike Kravetz Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" 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 Reviewed-by: Jan Kara Signed-off-by: John Hubbard --- 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 405be10da73d..9639ebc21e8a 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -4521,7 +4521,7 @@ 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, + pret =3D pin_user_pages(ubuf, nr_pages, FOLL_WRITE | FOLL_LONGTERM, pages, vmas); if (pret =3D=3D nr_pages) { --=20 2.24.0