[PATCH] Make XFS use BH_Unwritten and BH_Delay correctly

[powerpc.git] / fs / xfs / linux-2.6 / xfs_aops.c

diff --git a/fs/xfs/linux-2.6/xfs_aops.c b/fs/xfs/linux-2.6/xfs_aops.c
index 7b54461..143ffc8 100644 (file)
--- a/fs/xfs/linux-2.6/xfs_aops.c
+++ b/fs/xfs/linux-2.6/xfs_aops.c
@@ -56,8 +56,6 @@ xfs_count_page_state(
        do {
                if (buffer_uptodate(bh) && !buffer_mapped(bh))
                        (*unmapped) = 1;
-               else if (buffer_unwritten(bh) && !buffer_delay(bh))
-                       clear_buffer_unwritten(bh);
                else if (buffer_unwritten(bh))
                        (*unwritten) = 1;
                else if (buffer_delay(bh))
@@ -249,7 +247,7 @@ xfs_map_blocks(
        return -error;
 }
 
-STATIC inline int
+STATIC_INLINE int
 xfs_iomap_valid(
        xfs_iomap_t             *iomapp,
        loff_t                  offset)
@@ -1272,7 +1270,6 @@ __xfs_get_blocks(
                        if (direct)
                                bh_result->b_private = inode;
                        set_buffer_unwritten(bh_result);
-                       set_buffer_delay(bh_result);
                }
        }
 
@@ -1283,13 +1280,18 @@ __xfs_get_blocks(
        bh_result->b_bdev = iomap.iomap_target->bt_bdev;
 
        /*
-        * If we previously allocated a block out beyond eof and we are
-        * now coming back to use it then we will need to flag it as new
-        * even if it has a disk address.
+        * If we previously allocated a block out beyond eof and we are now
+        * coming back to use it then we will need to flag it as new even if it
+        * has a disk address.
+        *
+        * With sub-block writes into unwritten extents we also need to mark
+        * the buffer as new so that the unwritten parts of the buffer gets
+        * correctly zeroed.
         */
        if (create &&
            ((!buffer_mapped(bh_result) && !buffer_uptodate(bh_result)) ||
-            (offset >= i_size_read(inode)) || (iomap.iomap_flags & IOMAP_NEW)))
+            (offset >= i_size_read(inode)) ||
+            (iomap.iomap_flags & (IOMAP_NEW|IOMAP_UNWRITTEN))))
                set_buffer_new(bh_result);
 
        if (iomap.iomap_flags & IOMAP_DELAY) {