linux-kernel - [PATCH v3 29/41] mm/memory.c: convert put_page() to put_user

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Message-Id: <20190807013340.9706-30-jhubbard@nvidia.com>
Date:   Tue,  6 Aug 2019 18:33:28 -0700
From:   john.hubbard@...il.com
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     Christoph Hellwig <hch@...radead.org>,
        Dan Williams <dan.j.williams@...el.com>,
        Dave Chinner <david@...morbit.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Ira Weiny <ira.weiny@...el.com>, Jan Kara <jack@...e.cz>,
        Jason Gunthorpe <jgg@...pe.ca>,
        Jérôme Glisse <jglisse@...hat.com>,
        LKML <linux-kernel@...r.kernel.org>,
        amd-gfx@...ts.freedesktop.org, ceph-devel@...r.kernel.org,
        devel@...verdev.osuosl.org, devel@...ts.orangefs.org,
        dri-devel@...ts.freedesktop.org, intel-gfx@...ts.freedesktop.org,
        kvm@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-block@...r.kernel.org, linux-crypto@...r.kernel.org,
        linux-fbdev@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-media@...r.kernel.org, linux-mm@...ck.org,
        linux-nfs@...r.kernel.org, linux-rdma@...r.kernel.org,
        linux-rpi-kernel@...ts.infradead.org, linux-xfs@...r.kernel.org,
        netdev@...r.kernel.org, rds-devel@....oracle.com,
        sparclinux@...r.kernel.org, x86@...nel.org,
        xen-devel@...ts.xenproject.org, John Hubbard <jhubbard@...dia.com>,
        "Aneesh Kumar K . V" <aneesh.kumar@...ux.ibm.com>,
        Huang Ying <ying.huang@...el.com>,
        Matthew Wilcox <willy@...radead.org>,
        Michal Hocko <mhocko@...e.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Rik van Riel <riel@...riel.com>,
        Souptick Joarder <jrdr.linux@...il.com>,
        Will Deacon <will.deacon@....com>
Subject: [PATCH v3 29/41] mm/memory.c: convert put_page() to put_user_page*()

From: John Hubbard <jhubbard@...dia.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: Aneesh Kumar K.V <aneesh.kumar@...ux.ibm.com>
Cc: Huang Ying <ying.huang@...el.com>
Cc: Jérôme Glisse <jglisse@...hat.com>
Cc: Matthew Wilcox <willy@...radead.org>
Cc: Michal Hocko <mhocko@...e.com>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Rik van Riel <riel@...riel.com>
Cc: Souptick Joarder <jrdr.linux@...il.com>
Cc: Will Deacon <will.deacon@....com>
Signed-off-by: John Hubbard <jhubbard@...dia.com>
---
 mm/memory.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/memory.c b/mm/memory.c
index e2bb51b6242e..8870968496ea 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -4337,7 +4337,7 @@ int __access_remote_vm(struct task_struct *tsk, struct mm_struct *mm,
 						    buf, maddr + offset, bytes);
 			}
 			kunmap(page);
-			put_page(page);
+			put_user_page(page);
 		}
 		len -= bytes;
 		buf += bytes;
-- 
2.22.0