[XFS] Fix check for block zero access in xfs_write_iomap_allocate()

The check for block zero access should be done on non-realtime inodes. Fix
the logic error in xfs_write_iomap_allocate(), and simplify the logic on
all checks for block zero access in xfs_iomap.c

SGI-PV: 980888
SGI-Modid: xfs-linux-melb:xfs-kern:30998a

Signed-off-by: David Chinner <dgc@sgi.com>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>

diff --git a/fs/xfs/xfs_iomap.c b/fs/xfs/xfs_iomap.c
index a2c3200a099f86afe5577eddc8fb916337819f0f..7edcde691d1a2539e340db2e83769ad12188e6e6 100644 (file)
--- a/fs/xfs/xfs_iomap.c
+++ b/fs/xfs/xfs_iomap.c
@@ -523,8 +523,7 @@ xfs_iomap_write_direct(
                goto error_out;
        }
 
-       if (unlikely(!imap.br_startblock &&
-                    !(XFS_IS_REALTIME_INODE(ip)))) {
+       if (!(imap.br_startblock || XFS_IS_REALTIME_INODE(ip))) {
                error = xfs_cmn_err_fsblock_zero(ip, &imap);
                goto error_out;
        }
@@ -686,8 +685,7 @@ retry:
                goto retry;
        }
 
-       if (unlikely(!imap[0].br_startblock &&
-                    !(XFS_IS_REALTIME_INODE(ip))))
+       if (!(imap[0].br_startblock || XFS_IS_REALTIME_INODE(ip)))
                return xfs_cmn_err_fsblock_zero(ip, &imap[0]);
 
        *ret_imap = imap[0];
@@ -838,9 +836,9 @@ xfs_iomap_write_allocate(
                 * See if we were able to allocate an extent that
                 * covers at least part of the callers request
                 */
-               if (unlikely(!imap.br_startblock &&
-                            XFS_IS_REALTIME_INODE(ip)))
+               if (!(imap.br_startblock || XFS_IS_REALTIME_INODE(ip)))
                        return xfs_cmn_err_fsblock_zero(ip, &imap);
+
                if ((offset_fsb >= imap.br_startoff) &&
                    (offset_fsb < (imap.br_startoff +
                                   imap.br_blockcount))) {
@@ -934,8 +932,7 @@ xfs_iomap_write_unwritten(
                if (error)
                        return XFS_ERROR(error);
 
-               if (unlikely(!imap.br_startblock &&
-                            !(XFS_IS_REALTIME_INODE(ip))))
+               if (!(imap.br_startblock || XFS_IS_REALTIME_INODE(ip)))
                        return xfs_cmn_err_fsblock_zero(ip, &imap);
 
                if ((numblks_fsb = imap.br_blockcount) == 0) {