linux-kernel - [PATCH 1/3] mm/mlock.c: convert put_page() to put_user

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Message-Id: <20190805222019.28592-2-jhubbard@nvidia.com>
Date:   Mon,  5 Aug 2019 15:20:17 -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>,
        Dan Williams <dan.j.williams@...el.com>,
        Daniel Black <daniel@...ux.ibm.com>,
        Matthew Wilcox <willy@...radead.org>,
        Mike Kravetz <mike.kravetz@...cle.com>
Subject: [PATCH 1/3] mm/mlock.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: Dan Williams <dan.j.williams@...el.com>
Cc: Daniel Black <daniel@...ux.ibm.com>
Cc: Jan Kara <jack@...e.cz>
Cc: Jérôme Glisse <jglisse@...hat.com>
Cc: Matthew Wilcox <willy@...radead.org>
Cc: Mike Kravetz <mike.kravetz@...cle.com>
Signed-off-by: John Hubbard <jhubbard@...dia.com>
---
 mm/mlock.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/mm/mlock.c b/mm/mlock.c
index a90099da4fb4..b980e6270e8a 100644
--- a/mm/mlock.c
+++ b/mm/mlock.c
@@ -345,7 +345,7 @@ static void __munlock_pagevec(struct pagevec *pvec, struct zone *zone)
 				get_page(page); /* for putback_lru_page() */
 				__munlock_isolated_page(page);
 				unlock_page(page);
-				put_page(page); /* from follow_page_mask() */
+				put_user_page(page); /* from follow_page_mask() */
 			}
 		}
 	}
@@ -467,7 +467,7 @@ void munlock_vma_pages_range(struct vm_area_struct *vma,
 		if (page && !IS_ERR(page)) {
 			if (PageTransTail(page)) {
 				VM_BUG_ON_PAGE(PageMlocked(page), page);
-				put_page(page); /* follow_page_mask() */
+				put_user_page(page); /* follow_page_mask() */
 			} else if (PageTransHuge(page)) {
 				lock_page(page);
 				/*
@@ -478,7 +478,7 @@ void munlock_vma_pages_range(struct vm_area_struct *vma,
 				 */
 				page_mask = munlock_vma_page(page);
 				unlock_page(page);
-				put_page(page); /* follow_page_mask() */
+				put_user_page(page); /* follow_page_mask() */
 			} else {
 				/*
 				 * Non-huge pages are handled in batches via
-- 
2.22.0