JFS: Take logsync lock before testing mp->lsn

[linux-2.6-omap-h63xx.git] / fs / jfs / jfs_dmap.c

diff --git a/fs/jfs/jfs_dmap.c b/fs/jfs/jfs_dmap.c
index 4fb3ed1849259dc4955c6774a93eb69c0000a4f4..c161c98954e08b17afb7e849ef57c7b47bbd1b6f 100644 (file)
--- a/fs/jfs/jfs_dmap.c
+++ b/fs/jfs/jfs_dmap.c
@@ -532,10 +532,10 @@ dbUpdatePMap(struct inode *ipbmap,
 
                lastlblkno = lblkno;
 
+               LOGSYNC_LOCK(log, flags);
                if (mp->lsn != 0) {
                        /* inherit older/smaller lsn */
                        logdiff(diffp, mp->lsn, log);
-                       LOGSYNC_LOCK(log, flags);
                        if (difft < diffp) {
                                mp->lsn = lsn;
 
@@ -548,20 +548,17 @@ dbUpdatePMap(struct inode *ipbmap,
                        logdiff(diffp, mp->clsn, log);
                        if (difft > diffp)
                                mp->clsn = tblk->clsn;
-                       LOGSYNC_UNLOCK(log, flags);
                } else {
                        mp->log = log;
                        mp->lsn = lsn;
 
                        /* insert bp after tblock in logsync list */
-                       LOGSYNC_LOCK(log, flags);
-
                        log->count++;
                        list_add(&mp->synclist, &tblk->synclist);
 
                        mp->clsn = tblk->clsn;
-                       LOGSYNC_UNLOCK(log, flags);
                }
+               LOGSYNC_UNLOCK(log, flags);
        }
 
        /* write the last buffer. */