[PATCH] eCryptfs: Grab lock on lower_page in ecryptfs_sync_page

From: Michael Halcrow
Date: Wed Sep 27 2006 - 12:30:22 EST

The recent swap of grab_cache_page() with find_get_page() in
ecryptfs_sync_page() missed the fact that we need a lock on the lower
page. This patch replaces find_get_page() with find_lock_page() in
order to make sure that this lock is obtained.

Signed-off-by: Michael Halcrow <mhalcrow@xxxxxxxxxx>


fs/ecryptfs/mmap.c | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/ecryptfs/mmap.c b/fs/ecryptfs/mmap.c
index 8a4040d..924dd90 100644
--- a/fs/ecryptfs/mmap.c
+++ b/fs/ecryptfs/mmap.c
@@ -766,9 +766,9 @@ static void ecryptfs_sync_page(struct pa
lower_inode = ecryptfs_inode_to_lower(inode);
/* NOTE: Recently swapped with grab_cache_page(), since
* sync_page() just makes sure that pending I/O gets done. */
- lower_page = find_get_page(lower_inode->i_mapping, page->index);
+ lower_page = find_lock_page(lower_inode->i_mapping, page->index);
if (!lower_page) {
- ecryptfs_printk(KERN_DEBUG, "find_get_page failed\n");
+ ecryptfs_printk(KERN_DEBUG, "find_lock_page failed\n");

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