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From: john.hubbard@gmail.com
To: Andrew Morton <akpm@linux-foundation.org>
Cc: "Christoph Hellwig" <hch@infradead.org>,
	"Dan Williams" <dan.j.williams@intel.com>,
	"Dave Chinner" <david@fromorbit.com>,
	"Dave Hansen" <dave.hansen@linux.intel.com>,
	"Ira Weiny" <ira.weiny@intel.com>, "Jan Kara" <jack@suse.cz>,
	"Jason Gunthorpe" <jgg@ziepe.ca>,
	"Jérôme Glisse" <jglisse@redhat.com>,
	LKML <linux-kernel@vger.kernel.org>,
	amd-gfx@lists.freedesktop.org, ceph-devel@vger.kernel.org,
	devel@driverdev.osuosl.org, devel@lists.orangefs.org,
	dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org,
	kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
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	linux-fbdev@vger.kernel.org, linux-fsdevel@vger.kernel.org,
	linux-media@vger.kernel.org, linux-mm@kvack.org,
	linux-nfs@vger.kernel.org, linux-rdma@vger.kernel.org,
	linux-rpi-kernel@lists.infradead.org, linux-xfs@vger.kernel.org,
	netdev@vger.kernel.org, rds-devel@oss.oracle.com,
	sparclinux@vger.kernel.org, x86@kernel.org,
	xen-devel@lists.xenproject.org,
	"John Hubbard" <jhubbard@nvidia.com>,
	"Al Viro" <viro@zeniv.linux.org.uk>,
	"Andrea Arcangeli" <aarcange@redhat.com>,
	"Christopher Yeoh" <cyeoh@au1.ibm.com>,
	"Heiko Carstens" <heiko.carstens@de.ibm.com>,
	"Ingo Molnar" <mingo@kernel.org>, "Jann Horn" <jann@thejh.net>,
	"Lorenzo Stoakes" <lstoakes@gmail.com>,
	"Mathieu Desnoyers" <mathieu.desnoyers@efficios.com>,
	"Mike Rapoport" <rppt@linux.vnet.ibm.com>,
	"Rashika Kheria" <rashika.kheria@gmail.com>
Subject: [PATCH 29/34] mm/process_vm_access.c: convert put_page() to put_user_page*()
Date: Thu,  1 Aug 2019 19:20:00 -0700	[thread overview]
Message-ID: <20190802022005.5117-30-jhubbard@nvidia.com> (raw)
In-Reply-To: <20190802022005.5117-1-jhubbard@nvidia.com>

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: Al Viro <viro@zeniv.linux.org.uk>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Christopher Yeoh <cyeoh@au1.ibm.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jann Horn <jann@thejh.net>
Cc: Lorenzo Stoakes <lstoakes@gmail.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Mike Rapoport <rppt@linux.vnet.ibm.com>
Cc: Rashika Kheria <rashika.kheria@gmail.com>
Signed-off-by: John Hubbard <jhubbard@nvidia.com>
---
 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 |= FOLL_WRITE;
 
 	while (!rc && nr_pages && iov_iter_count(iter)) {
-		int pages = min(nr_pages, max_pages_per_loop);
+		int pinned_pages = min(nr_pages, max_pages_per_loop);
 		int locked = 1;
 		size_t bytes;
 
@@ -106,14 +106,15 @@ static int process_vm_rw_single_vec(unsigned long addr,
 		 * current/current->mm
 		 */
 		down_read(&mm->mmap_sem);
-		pages = get_user_pages_remote(task, mm, pa, pages, flags,
-					      process_pages, NULL, &locked);
+		pinned_pages = get_user_pages_remote(task, mm, pa, pinned_pages,
+						     flags, process_pages, NULL,
+						     &locked);
 		if (locked)
 			up_read(&mm->mmap_sem);
-		if (pages <= 0)
+		if (pinned_pages <= 0)
 			return -EFAULT;
 
-		bytes = pages * PAGE_SIZE - start_offset;
+		bytes = pinned_pages * PAGE_SIZE - start_offset;
 		if (bytes > len)
 			bytes = len;
 
@@ -122,10 +123,9 @@ static int process_vm_rw_single_vec(unsigned long addr,
 					 vm_write);
 		len -= bytes;
 		start_offset = 0;
-		nr_pages -= pages;
-		pa += pages * PAGE_SIZE;
-		while (pages)
-			put_page(process_pages[--pages]);
+		nr_pages -= pinned_pages;
+		pa += pinned_pages * PAGE_SIZE;
+		put_user_pages(process_pages, pinned_pages);
 	}
 
 	return rc;
-- 
2.22.0


  parent reply	other threads:[~2019-08-02  2:22 UTC|newest]

Thread overview: 64+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-02  2:19 [PATCH 00/34] put_user_pages(): miscellaneous call sites john.hubbard
2019-08-02  2:19 ` [PATCH 01/34] mm/gup: add make_dirty arg to put_user_pages_dirty_lock() john.hubbard
2019-08-02  2:19 ` [PATCH 02/34] net/rds: convert put_page() to put_user_page*() john.hubbard
2019-08-02  2:19 ` [PATCH 03/34] net/ceph: " john.hubbard
2019-08-02 22:32   ` Jeff Layton
2019-08-02  2:19 ` [PATCH 04/34] x86/kvm: " john.hubbard
2019-08-02  2:19 ` [PATCH 05/34] drm/etnaviv: convert release_pages() to put_user_pages() john.hubbard
2019-08-02  2:19 ` [PATCH 06/34] drm/i915: convert put_page() to put_user_page*() john.hubbard
2019-08-02  9:19   ` Joonas Lahtinen
2019-08-02 18:48     ` John Hubbard
2019-08-03 20:03       ` John Hubbard
2019-08-02  2:19 ` [PATCH 07/34] drm/radeon: " john.hubbard
2019-08-02  2:19 ` [PATCH 08/34] media/ivtv: " john.hubbard
2019-08-02  2:19 ` [PATCH 09/34] media/v4l2-core/mm: " john.hubbard
2019-08-02  2:19 ` [PATCH 10/34] genwqe: " john.hubbard
2019-08-03  7:06   ` Greg Kroah-Hartman
2019-08-02  2:19 ` [PATCH 11/34] scif: " john.hubbard
2019-08-02  2:19 ` [PATCH 12/34] vmci: " john.hubbard
2019-08-02  2:19 ` [PATCH 13/34] rapidio: " john.hubbard
2019-08-02  2:19 ` [PATCH 14/34] oradax: " john.hubbard
2019-08-02  2:19 ` [PATCH 15/34] staging/vc04_services: " john.hubbard
2019-08-03  7:06   ` Greg Kroah-Hartman
2019-08-02  2:19 ` [PATCH 16/34] drivers/tee: " john.hubbard
2019-08-02  6:29   ` Jens Wiklander
2019-08-02 18:51     ` John Hubbard
2019-08-02  2:19 ` [PATCH 17/34] vfio: " john.hubbard
2019-08-02  2:19 ` [PATCH 18/34] fbdev/pvr2fb: " john.hubbard
2019-08-02  2:19 ` [PATCH 19/34] fsl_hypervisor: " john.hubbard
2019-08-02  2:19 ` [PATCH 20/34] xen: " john.hubbard
2019-08-02  4:36   ` Juergen Gross
2019-08-02  5:48     ` John Hubbard
2019-08-02  6:10       ` Juergen Gross
2019-08-02 16:09         ` Weiny, Ira
2019-08-02 19:25           ` John Hubbard
2019-08-02  2:19 ` [PATCH 21/34] fs/exec.c: " john.hubbard
2019-08-02  2:19 ` [PATCH 22/34] orangefs: " john.hubbard
2019-08-02  2:19 ` [PATCH 23/34] uprobes: " john.hubbard
2019-08-02  2:19 ` [PATCH 24/34] futex: " john.hubbard
2019-08-02  2:19 ` [PATCH 25/34] mm/frame_vector.c: " john.hubbard
2019-08-02  2:19 ` [PATCH 26/34] mm/gup_benchmark.c: " john.hubbard
2019-08-02 14:19   ` Keith Busch
2019-08-02  2:19 ` [PATCH 27/34] mm/memory.c: " john.hubbard
2019-08-02  2:19 ` [PATCH 28/34] mm/madvise.c: " john.hubbard
2019-08-02  2:20 ` john.hubbard [this message]
2019-08-02  2:20 ` [PATCH 30/34] crypt: " john.hubbard
2019-08-02  2:20 ` [PATCH 31/34] nfs: " john.hubbard
2019-08-03  1:27   ` Calum Mackay
2019-08-03  1:41     ` John Hubbard
2019-08-04 23:28       ` Calum Mackay
2019-08-02  2:20 ` [PATCH 32/34] goldfish_pipe: " john.hubbard
2019-08-02  2:20 ` [PATCH 33/34] kernel/events/core.c: " john.hubbard
2019-08-02  2:20 ` [PATCH 34/34] fs/binfmt_elf: " john.hubbard
2019-08-02  9:12 ` [PATCH 00/34] put_user_pages(): miscellaneous call sites Michal Hocko
2019-08-02 12:41   ` Jan Kara
2019-08-02 14:24     ` Matthew Wilcox
2019-08-02 14:52       ` Jan Kara
2019-08-02 19:14         ` John Hubbard
2019-08-07  8:37           ` Jan Kara
2019-08-07  8:46             ` Michal Hocko
2019-08-08  2:36               ` Ira Weiny
2019-08-08  3:46                 ` John Hubbard
2019-08-08 16:25                   ` Weiny, Ira
2019-08-08 18:18                     ` John Hubbard
2019-08-09  8:34                 ` Jan Kara

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