linux-kernel - [PATCH 2/3] mm/mempolicy.c: convert put_page() to put_user

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Message-Id: <20190805222019.28592-3-jhubbard@nvidia.com>
Date:   Mon,  5 Aug 2019 15:20:18 -0700
From:   john.hubbard@...il.com
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     Christoph Hellwig <hch@...radead.org>,
        Ira Weiny <ira.weiny@...el.com>, Jan Kara <jack@...e.cz>,
        Jason Gunthorpe <jgg@...pe.ca>,
        Jerome Glisse <jglisse@...hat.com>,
        LKML <linux-kernel@...r.kernel.org>, linux-mm@...ck.org,
        linux-fsdevel@...r.kernel.org, John Hubbard <jhubbard@...dia.com>,
        Andrea Arcangeli <aarcange@...hat.com>,
        Anshuman Khandual <anshuman.khandual@....com>,
        David Rientjes <rientjes@...gle.com>,
        Dominik Brodowski <linux@...inikbrodowski.net>,
        "Kirill A . Shutemov" <kirill.shutemov@...ux.intel.com>,
        Michal Hocko <mhocko@...e.com>,
        Vlastimil Babka <vbabka@...e.cz>,
        zhong jiang <zhongjiang@...wei.com>
Subject: [PATCH 2/3] mm/mempolicy.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: Andrea Arcangeli <aarcange@...hat.com>
Cc: Anshuman Khandual <anshuman.khandual@....com>
Cc: David Rientjes <rientjes@...gle.com>
Cc: Dominik Brodowski <linux@...inikbrodowski.net>
Cc: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>
Cc: Michal Hocko <mhocko@...e.com>
Cc: Vlastimil Babka <vbabka@...e.cz>
Cc: zhong jiang <zhongjiang@...wei.com>
Signed-off-by: John Hubbard <jhubbard@...dia.com>
---
 mm/mempolicy.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index f48693f75b37..76a8e935e2e6 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -832,7 +832,7 @@ static int lookup_node(struct mm_struct *mm, unsigned long addr)
 	err = get_user_pages_locked(addr & PAGE_MASK, 1, 0, &p, &locked);
 	if (err >= 0) {
 		err = page_to_nid(p);
-		put_page(p);
+		put_user_page(p);
 	}
 	if (locked)
 		up_read(&mm->mmap_sem);
-- 
2.22.0