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From: John Hubbard <jhubbard@nvidia.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: "Al Viro" <viro@zeniv.linux.org.uk>,
	"Alex Williamson" <alex.williamson@redhat.com>,
	"Benjamin Herrenschmidt" <benh@kernel.crashing.org>,
	"Björn Töpel" <bjorn.topel@intel.com>,
	"Christoph Hellwig" <hch@infradead.org>,
	"Dan Williams" <dan.j.williams@intel.com>,
	"Daniel Vetter" <daniel@ffwll.ch>,
	"Dave Chinner" <david@fromorbit.com>,
	"David Airlie" <airlied@linux.ie>,
	"David S . Miller" <davem@davemloft.net>,
	"Ira Weiny" <ira.weiny@intel.com>, "Jan Kara" <jack@suse.cz>,
	"Jason Gunthorpe" <jgg@ziepe.ca>, "Jens Axboe" <axboe@kernel.dk>,
	"Jonathan Corbet" <corbet@lwn.net>,
	"Jérôme Glisse" <jglisse@redhat.com>,
	"Kirill A . Shutemov" <kirill@shutemov.name>,
	"Magnus Karlsson" <magnus.karlsson@intel.com>,
	"Mauro Carvalho Chehab" <mchehab@kernel.org>,
	"Michael Ellerman" <mpe@ellerman.id.au>,
	"Michal Hocko" <mhocko@suse.com>,
	"Mike Kravetz" <mike.kravetz@oracle.com>,
	"Paul Mackerras" <paulus@samba.org>,
	"Shuah Khan" <shuah@kernel.org>,
	"Vlastimil Babka" <vbabka@suse.cz>,
	bpf@vger.kernel.org, dri-devel@lists.freedesktop.org,
	kvm@vger.kernel.org, linux-block@vger.kernel.org,
	linux-doc@vger.kernel.org, linux-fsdevel@vger.kernel.org,
	linux-kselftest@vger.kernel.org, linux-media@vger.kernel.org,
	linux-rdma@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
	netdev@vger.kernel.org, linux-mm@kvack.org,
	LKML <linux-kernel@vger.kernel.org>,
	"John Hubbard" <jhubbard@nvidia.com>
Subject: [PATCH v12 20/22] powerpc: book3s64: convert to pin_user_pages() and put_user_page()
Date: Tue, 7 Jan 2020 14:45:56 -0800	[thread overview]
Message-ID: <20200107224558.2362728-21-jhubbard@nvidia.com> (raw)
In-Reply-To: <20200107224558.2362728-1-jhubbard@nvidia.com>

1. Convert from get_user_pages() to pin_user_pages().

2. As required by pin_user_pages(), release these pages via
put_user_page().

Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: John Hubbard <jhubbard@nvidia.com>
---
 arch/powerpc/mm/book3s64/iommu_api.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/arch/powerpc/mm/book3s64/iommu_api.c b/arch/powerpc/mm/book3s64/iommu_api.c
index 56cc84520577..a86547822034 100644
--- a/arch/powerpc/mm/book3s64/iommu_api.c
+++ b/arch/powerpc/mm/book3s64/iommu_api.c
@@ -103,7 +103,7 @@ static long mm_iommu_do_alloc(struct mm_struct *mm, unsigned long ua,
 	for (entry = 0; entry < entries; entry += chunk) {
 		unsigned long n = min(entries - entry, chunk);
 
-		ret = get_user_pages(ua + (entry << PAGE_SHIFT), n,
+		ret = pin_user_pages(ua + (entry << PAGE_SHIFT), n,
 				FOLL_WRITE | FOLL_LONGTERM,
 				mem->hpages + entry, NULL);
 		if (ret == n) {
@@ -167,9 +167,8 @@ static long mm_iommu_do_alloc(struct mm_struct *mm, unsigned long ua,
 	return 0;
 
 free_exit:
-	/* free the reference taken */
-	for (i = 0; i < pinned; i++)
-		put_page(mem->hpages[i]);
+	/* free the references taken */
+	put_user_pages(mem->hpages, pinned);
 
 	vfree(mem->hpas);
 	kfree(mem);
@@ -215,7 +214,8 @@ static void mm_iommu_unpin(struct mm_iommu_table_group_mem_t *mem)
 		if (mem->hpas[i] & MM_IOMMU_TABLE_GROUP_PAGE_DIRTY)
 			SetPageDirty(page);
 
-		put_page(page);
+		put_user_page(page);
+
 		mem->hpas[i] = 0;
 	}
 }
-- 
2.24.1


  parent reply	other threads:[~2020-01-07 22:46 UTC|newest]

Thread overview: 36+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-07 22:45 [PATCH v12 00/22] mm/gup: prereqs to track dma-pinned pages: FOLL_PIN John Hubbard
2020-01-07 22:45 ` [PATCH v12 01/22] mm/gup: factor out duplicate code from four routines John Hubbard
2020-01-07 22:45 ` [PATCH v12 02/22] mm/gup: move try_get_compound_head() to top, fix minor issues John Hubbard
2020-01-07 22:45 ` [PATCH v12 03/22] mm: Cleanup __put_devmap_managed_page() vs ->page_free() John Hubbard
2020-01-07 22:45 ` [PATCH v12 04/22] mm: devmap: refactor 1-based refcounting for ZONE_DEVICE pages John Hubbard
2020-01-15 15:23   ` Christoph Hellwig
2020-01-15 21:19     ` John Hubbard
2020-01-16  9:37       ` Christoph Hellwig
2020-01-16 20:30         ` John Hubbard
2020-01-07 22:45 ` [PATCH v12 05/22] goldish_pipe: rename local pin_user_pages() routine John Hubbard
2020-01-15 15:23   ` Christoph Hellwig
2020-01-07 22:45 ` [PATCH v12 06/22] mm: fix get_user_pages_remote()'s handling of FOLL_LONGTERM John Hubbard
2020-01-15 15:24   ` Christoph Hellwig
2020-01-07 22:45 ` [PATCH v12 07/22] vfio: fix FOLL_LONGTERM use, simplify get_user_pages_remote() call John Hubbard
2020-01-07 22:45 ` [PATCH v12 08/22] mm/gup: allow FOLL_FORCE for get_user_pages_fast() John Hubbard
2020-01-15 15:25   ` Christoph Hellwig
2020-01-07 22:45 ` [PATCH v12 09/22] IB/umem: use get_user_pages_fast() to pin DMA pages John Hubbard
2020-01-07 22:45 ` [PATCH v12 10/22] media/v4l2-core: set pages dirty upon releasing DMA buffers John Hubbard
2020-01-07 22:45 ` [PATCH v12 11/22] mm/gup: introduce pin_user_pages*() and FOLL_PIN John Hubbard
2020-01-15 15:30   ` Christoph Hellwig
2020-01-15 21:34     ` John Hubbard
2020-01-07 22:45 ` [PATCH v12 12/22] goldish_pipe: convert to pin_user_pages() and put_user_page() John Hubbard
2020-01-07 22:45 ` [PATCH v12 13/22] IB/{core,hw,umem}: set FOLL_PIN via pin_user_pages*(), fix up ODP John Hubbard
2020-01-07 22:45 ` [PATCH v12 14/22] mm/process_vm_access: set FOLL_PIN via pin_user_pages_remote() John Hubbard
2020-01-07 22:45 ` [PATCH v12 15/22] drm/via: set FOLL_PIN via pin_user_pages_fast() John Hubbard
2020-01-07 22:45 ` [PATCH v12 16/22] fs/io_uring: set FOLL_PIN via pin_user_pages() John Hubbard
2020-01-07 22:45 ` [PATCH v12 17/22] net/xdp: " John Hubbard
2020-01-07 22:45 ` [PATCH v12 18/22] media/v4l2-core: pin_user_pages (FOLL_PIN) and put_user_page() conversion John Hubbard
2020-01-07 22:45 ` [PATCH v12 19/22] vfio, mm: " John Hubbard
2020-01-07 22:45 ` John Hubbard [this message]
2020-01-07 22:45 ` [PATCH v12 21/22] mm/gup_benchmark: use proper FOLL_WRITE flags instead of hard-coding "1" John Hubbard
2020-01-07 22:45 ` [PATCH v12 22/22] mm, tree-wide: rename put_user_page*() to unpin_user_page*() John Hubbard
2020-01-15 15:26   ` Christoph Hellwig
2020-01-09 22:07 ` [PATCH v12 00/22] mm/gup: prereqs to track dma-pinned pages: FOLL_PIN John Hubbard
2020-01-14 20:15   ` John Hubbard
2020-01-14 23:29     ` Andrew Morton

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