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[216.228.112.21]) by smtp.gmail.com with ESMTPSA id r6sm35946836pjb.22.2019.08.04.15.50.03 (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Sun, 04 Aug 2019 15:50:05 -0700 (PDT) X-Inumbo-ID: 33c43d26-b70a-11e9-8980-bc764e045a96 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=P44t64b1Yt2CczJo6SOAPYnnEfAXhRMhGjbg0YSdFKY=; b=M2L6YAdxRG9wjsRrCe6Hi1BWSuOg3nnT/7fZiBi9EPm8FKwRKPZG/qe2iVkh5HnVN4 aOY3UbjkBBnyU76TUmUntE+kZe6hTFiJw358fIRHno09JT1X6eXkCbDzppqL0p2wk4as lvnBxcaafGoFzaHDQmz1tjx1PupzVr+3Bwm67hS0uZ1vXhGSeRklj059Ttpi/TbXqeOB q+Wl+DhD48e6x3JgIGWaWg109om0eB6fx6VWuDjwbuhJAY9G+Qx7/vpxnkVUdLKuN2o0 4E0MKgE+4sHPl7NeWK7fjvH31HAT3/QXcQRRRT0MdjjRb3hC4ZkOnyD0xdYCwRJ/SF1P 5dnQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=P44t64b1Yt2CczJo6SOAPYnnEfAXhRMhGjbg0YSdFKY=; b=uD4XdIeT7/3yuB3tHGqjeRtjjgEnn9aUilk8pHUex32hJSj8HWr1d4FMYgY+EFnzW5 rIX1JvWqNhnTMqrhbSu7F7rPVV+GtBW9OhP+9LfLMZC7bY+nxkbKK/+o+fpe5+lzyQVt bPgC0FLLg6KS5LCGYRqWs0YH8gLMEVtwwFS0unwuTtRrIFnH56nIpaK0vJreDkZK4dTm a/8mkpc1DL2ay7UVraf/D7mzGOfUlrDhcdFbkRh0e5UlbGmZrBHPLRR6fZ5aNP9c5IVW S2KdL24vAIAEGVOsy7Dj1zcIkYbBKgitUbePfprUdY1udCESGQIJdrwrSM1/JaZ1fXCD tfBg== X-Gm-Message-State: APjAAAW8OMfuqo8yNTcMPE/0zg53vNRBgl93fQW6gNhD9NgeIE5cUTWF xrSPuzl76etidU5nWx3Ji2w= X-Google-Smtp-Source: APXvYqwAR1ooAm+K3YiNJXFD4tuydWLDFWaO0CLJ4VvvN+1W/RZGreelHnJEnGprjIniv/pPljEZRw== X-Received: by 2002:a17:902:7202:: with SMTP id ba2mr144069047plb.266.1564959005550; Sun, 04 Aug 2019 15:50:05 -0700 (PDT) From: john.hubbard@gmail.com X-Google-Original-From: jhubbard@nvidia.com To: Andrew Morton Date: Sun, 4 Aug 2019 15:49:10 -0700 Message-Id: <20190804224915.28669-30-jhubbard@nvidia.com> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20190804224915.28669-1-jhubbard@nvidia.com> References: <20190804224915.28669-1-jhubbard@nvidia.com> MIME-Version: 1.0 X-NVConfidentiality: public Subject: [Xen-devel] [PATCH v2 29/34] mm/process_vm_access.c: convert put_page() to put_user_page*() X-BeenThere: xen-devel@lists.xenproject.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Cc: linux-fbdev@vger.kernel.org, Jan Kara , kvm@vger.kernel.org, Dave Hansen , Dave Chinner , dri-devel@lists.freedesktop.org, linux-mm@kvack.org, sparclinux@vger.kernel.org, Ira Weiny , ceph-devel@vger.kernel.org, devel@driverdev.osuosl.org, rds-devel@oss.oracle.com, linux-rdma@vger.kernel.org, x86@kernel.org, amd-gfx@lists.freedesktop.org, Ingo Molnar , Christoph Hellwig , Jason Gunthorpe , Rashika Kheria , xen-devel@lists.xenproject.org, devel@lists.orangefs.org, linux-media@vger.kernel.org, Andrea Arcangeli , John Hubbard , intel-gfx@lists.freedesktop.org, linux-block@vger.kernel.org, =?UTF-8?q?J=C3=A9r=C3=B4me=20Glisse?= , Mike Rapoport , Mathieu Desnoyers , linux-rpi-kernel@lists.infradead.org, Jann Horn , Dan Williams , linux-arm-kernel@lists.infradead.org, linux-nfs@vger.kernel.org, Lorenzo Stoakes , Heiko Carstens , netdev@vger.kernel.org, LKML , linux-xfs@vger.kernel.org, linux-crypto@vger.kernel.org, Christopher Yeoh , linux-fsdevel@vger.kernel.org, Al Viro Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) From: John Hubbard 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: Al Viro Cc: Andrea Arcangeli Cc: Christopher Yeoh Cc: Dave Hansen Cc: Heiko Carstens Cc: Ingo Molnar Cc: Jann Horn Cc: Lorenzo Stoakes Cc: Mathieu Desnoyers Cc: Mike Rapoport Cc: Rashika Kheria Signed-off-by: John Hubbard --- mm/process_vm_access.c | 18 +++++++++--------- 1 file changed, 9 insertions(+), 9 deletions(-) diff --git a/mm/process_vm_access.c b/mm/process_vm_access.c index 357aa7bef6c0..4d29d54ec93f 100644 --- a/mm/process_vm_access.c +++ b/mm/process_vm_access.c @@ -96,7 +96,7 @@ static int process_vm_rw_single_vec(unsigned long addr, flags |=3D FOLL_WRITE; =20 while (!rc && nr_pages && iov_iter_count(iter)) { - int pages =3D min(nr_pages, max_pages_per_loop); + int pinned_pages =3D min(nr_pages, max_pages_per_loop); int locked =3D 1; size_t bytes; =20 @@ -106,14 +106,15 @@ static int process_vm_rw_single_vec(unsigned long add= r, * current/current->mm */ down_read(&mm->mmap_sem); - pages =3D get_user_pages_remote(task, mm, pa, pages, flags, - process_pages, NULL, &locked); + pinned_pages =3D get_user_pages_remote(task, mm, pa, pinned_pages, + flags, process_pages, NULL, + &locked); if (locked) up_read(&mm->mmap_sem); - if (pages <=3D 0) + if (pinned_pages <=3D 0) return -EFAULT; =20 - bytes =3D pages * PAGE_SIZE - start_offset; + bytes =3D pinned_pages * PAGE_SIZE - start_offset; if (bytes > len) bytes =3D len; =20 @@ -122,10 +123,9 @@ static int process_vm_rw_single_vec(unsigned long addr, vm_write); len -=3D bytes; start_offset =3D 0; - nr_pages -=3D pages; - pa +=3D pages * PAGE_SIZE; - while (pages) - put_page(process_pages[--pages]); + nr_pages -=3D pinned_pages; + pa +=3D pinned_pages * PAGE_SIZE; + put_user_pages(process_pages, pinned_pages); } =20 return rc; --=20 2.22.0 _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel