Merge commit 'v2.6.31-rc7' into x86/cleanups

Merge reason: we were on -rc1 before - go up to -rc7

Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 22 insertions, 22 deletions

diff --git a/fs/nilfs2/segment.c b/fs/nilfs2/segment.c
index aa977549919e..51ff3d0a4ee2 100644
--- a/fs/nilfs2/segment.c
+++ b/fs/nilfs2/segment.c
@@ -1829,26 +1829,13 @@ static int nilfs_segctor_write(struct nilfs_sc_info *sci,
                 err = nilfs_segbuf_write(segbuf, &wi);
 
                 res = nilfs_segbuf_wait(segbuf, &wi);
-                err = unlikely(err) ? : res;
-                if (unlikely(err))
+                err = err ? : res;
+                if (err)
                         return err;
         }
         return 0;
 }
 
-static int nilfs_page_has_uncleared_buffer(struct page *page)
-{
-        struct buffer_head *head, *bh;
-
-        head = bh = page_buffers(page);
-        do {
-                if (buffer_dirty(bh) && !list_empty(&bh->b_assoc_buffers))
-                        return 1;
-                bh = bh->b_this_page;
-        } while (bh != head);
-        return 0;
-}
-
 static void __nilfs_end_page_io(struct page *page, int err)
 {
         if (!err) {
@@ -1872,13 +1859,26 @@ static void nilfs_end_page_io(struct page *page, int err)
         if (!page)
                 return;
 
-        if (buffer_nilfs_node(page_buffers(page)) &&
-            nilfs_page_has_uncleared_buffer(page))
-                /* For b-tree node pages, this function may be called twice
-                   or more because they might be split in a segment.
-                   This check assures that cleanup has been done for all
-                   buffers in a split btnode page. */
+        if (buffer_nilfs_node(page_buffers(page)) && !PageWriteback(page)) {
+                /*
+                 * For b-tree node pages, this function may be called twice
+                 * or more because they might be split in a segment.
+                 */
+                if (PageDirty(page)) {
+                        /*
+                         * For pages holding split b-tree node buffers, dirty
+                         * flag on the buffers may be cleared discretely.
+                         * In that case, the page is once redirtied for
+                         * remaining buffers, and it must be cancelled if
+                         * all the buffers get cleaned later.
+                         */
+                        lock_page(page);
+                        if (nilfs_page_buffers_clean(page))
+                                __nilfs_clear_page_dirty(page);
+                        unlock_page(page);
+                }
                 return;
+        }
 
         __nilfs_end_page_io(page, err);
 }
@@ -1940,7 +1940,7 @@ static void nilfs_segctor_abort_write(struct nilfs_sc_info *sci,
                         }
                         if (bh->b_page != fs_page) {
                                 nilfs_end_page_io(fs_page, err);
-                                if (unlikely(fs_page == failed_page))
+                                if (fs_page && fs_page == failed_page)
                                         goto done;
                                 fs_page = bh->b_page;
                         }