UBIFS: use PAGE_CACHE_MASK correctly

It has high bits set, not low bits set as the UBIFS code
assumed.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/fs/ubifs/file.c b/fs/ubifs/file.c
index 2624411d9758..7f1de98e6091 100644
--- a/fs/ubifs/file.c
+++ b/fs/ubifs/file.c
@@ -254,7 +254,7 @@ static int write_begin_slow(struct address_space *mapping,
         }
 
         if (!PageUptodate(page)) {
-                if (!(pos & PAGE_CACHE_MASK) && len == PAGE_CACHE_SIZE)
+                if (!(pos & ~PAGE_CACHE_MASK) && len == PAGE_CACHE_SIZE)
                         SetPageChecked(page);
                 else {
                         err = do_readpage(page);
@@ -444,7 +444,7 @@ static int ubifs_write_begin(struct file *file, struct address_space *mapping,
 
         if (!PageUptodate(page)) {
                 /* The page is not loaded from the flash */
-                if (!(pos & PAGE_CACHE_MASK) && len == PAGE_CACHE_SIZE)
+                if (!(pos & ~PAGE_CACHE_MASK) && len == PAGE_CACHE_SIZE)
                         /*
                          * We change whole page so no need to load it. But we
                          * have to set the @PG_checked flag to make the further