reiserfs: use ->invalidatepage() length argument

->invalidatepage() aop now accepts range to invalidate so we can make
use of it in reiserfs_invalidatepage()

Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Cc: reiserfs-devel@vger.kernel.org

1 files changed, 7 insertions, 2 deletions

diff --git a/fs/reiserfs/inode.c b/fs/reiserfs/inode.c
index 278c86e3e6c4..76c8faddf137 100644
--- a/fs/reiserfs/inode.c
+++ b/fs/reiserfs/inode.c
@@ -2976,11 +2976,13 @@ static void reiserfs_invalidatepage(struct page *page, unsigned int offset,
         struct buffer_head *head, *bh, *next;
         struct inode *inode = page->mapping->host;
         unsigned int curr_off = 0;
+        unsigned int stop = offset + length;
+        int partial_page = (offset || length < PAGE_CACHE_SIZE);
         int ret = 1;
 
         BUG_ON(!PageLocked(page));
 
-        if (offset == 0)
+        if (!partial_page)
                 ClearPageChecked(page);
 
         if (!page_has_buffers(page))
@@ -2992,6 +2994,9 @@ static void reiserfs_invalidatepage(struct page *page, unsigned int offset,
                 unsigned int next_off = curr_off + bh->b_size;
                 next = bh->b_this_page;
 
+                if (next_off > stop)
+                        goto out;
+
                 /*
                  * is this block fully invalidated?
                  */
@@ -3010,7 +3015,7 @@ static void reiserfs_invalidatepage(struct page *page, unsigned int offset,
          * The get_block cached value has been unconditionally invalidated,
          * so real IO is not possible anymore.
          */
-        if (!offset && ret) {
+        if (!partial_page && ret) {
                 ret = try_to_release_page(page, 0);
                 /* maybe should BUG_ON(!ret); - neilb */
         }