From: Eric Sandeen <sandeen@redhat.com>
Date: Tue, 18 Dec 2007 12:12:31 -0600
Subject: [fs] ecryptfs: convert to memclear_highpage_flush
Message-id: 47680D8F.6040608@redhat.com
O-Subject: [RHEL 5.2 PATCH] 8/15: eCryptfs: backport zero_user_page to memclear_highpage_flush
Bugzilla: 228341

Backport to use RHEL5's memclear_highpage_flush vs.
upstream's zero_user_page

diff --git a/fs/ecryptfs/mmap.c b/fs/ecryptfs/mmap.c
index c1f1454..dbfb805 100644
--- a/fs/ecryptfs/mmap.c
+++ b/fs/ecryptfs/mmap.c
@@ -257,8 +257,8 @@ static int fill_zeros_to_end_of_page(struct page *page, unsigned int to)
 	end_byte_in_page = i_size_read(inode) % PAGE_CACHE_SIZE;
 	if (to > end_byte_in_page)
 		end_byte_in_page = to;
-	zero_user_page(page, end_byte_in_page,
-		PAGE_CACHE_SIZE - end_byte_in_page, KM_USER0);
+	memclear_highpage_flush(page, end_byte_in_page,
+		PAGE_CACHE_SIZE - end_byte_in_page);
 out:
 	return 0;
 }
@@ -298,7 +298,7 @@ static int ecryptfs_prepare_write(struct file *file, struct page *page,
 			}
 		}
 		if (end_of_prev_pg_pos + 1 > i_size_read(page->mapping->host))
-			zero_user_page(page, 0, PAGE_CACHE_SIZE, KM_USER0);
+			memclear_highpage_flush(page, 0, PAGE_CACHE_SIZE);
 	}
 out:
 	return rc;