[PATCH v3 26/41] futex: convert put_page() to put_user_page*()

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,
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	xen-devel@lists.xenproject.org,
	"John Hubbard" <jhubbard@nvidia.com>,
	"Thomas Gleixner" <tglx@linutronix.de>,
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	"Peter Zijlstra" <peterz@infradead.org>,
	"Darren Hart" <dvhart@infradead.org>
Subject: [PATCH v3 26/41] futex: convert put_page() to put_user_page*()
Date: Tue,  6 Aug 2019 18:33:25 -0700
Message-ID: <20190807013340.9706-27-jhubbard@nvidia.com> (raw)
In-Reply-To: <20190807013340.9706-1-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: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Darren Hart <dvhart@infradead.org>
Signed-off-by: John Hubbard <jhubbard@nvidia.com>
---
 kernel/futex.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/kernel/futex.c b/kernel/futex.c
index 6d50728ef2e7..4b4cae58ec57 100644
--- a/kernel/futex.c
+++ b/kernel/futex.c
@@ -623,7 +623,7 @@ get_futex_key(u32 __user *uaddr, int fshared, union futex_key *key, enum futex_a
 		lock_page(page);
 		shmem_swizzled = PageSwapCache(page) || page->mapping;
 		unlock_page(page);
-		put_page(page);
+		put_user_page(page);
 
 		if (shmem_swizzled)
 			goto again;
@@ -675,7 +675,7 @@ get_futex_key(u32 __user *uaddr, int fshared, union futex_key *key, enum futex_a
 
 		if (READ_ONCE(page->mapping) != mapping) {
 			rcu_read_unlock();
-			put_page(page);
+			put_user_page(page);
 
 			goto again;
 		}
@@ -683,7 +683,7 @@ get_futex_key(u32 __user *uaddr, int fshared, union futex_key *key, enum futex_a
 		inode = READ_ONCE(mapping->host);
 		if (!inode) {
 			rcu_read_unlock();
-			put_page(page);
+			put_user_page(page);
 
 			goto again;
 		}
@@ -702,7 +702,7 @@ get_futex_key(u32 __user *uaddr, int fshared, union futex_key *key, enum futex_a
 		 */
 		if (!atomic_inc_not_zero(&inode->i_count)) {
 			rcu_read_unlock();
-			put_page(page);
+			put_user_page(page);
 
 			goto again;
 		}
@@ -723,7 +723,7 @@ get_futex_key(u32 __user *uaddr, int fshared, union futex_key *key, enum futex_a
 	}
 
 out:
-	put_page(page);
+	put_user_page(page);
 	return err;
 }
 
-- 
2.22.0

