Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/shaggy...

[pandora-kernel.git] / fs / jfs / jfs_extent.c

diff --git a/fs/jfs/jfs_extent.c b/fs/jfs/jfs_extent.c
index 169802e..bbbd5f2 100644 (file)
--- a/fs/jfs/jfs_extent.c
+++ b/fs/jfs/jfs_extent.c
@@ -362,11 +362,12 @@ exit:
 int extHint(struct inode *ip, s64 offset, xad_t * xp)
 {
        struct super_block *sb = ip->i_sb;
-       struct xadlist xadl;
-       struct lxdlist lxdl;
-       lxd_t lxd;
+       int nbperpage = JFS_SBI(sb)->nbperpage;
        s64 prev;
-       int rc, nbperpage = JFS_SBI(sb)->nbperpage;
+       int rc = 0;
+       s64 xaddr;
+       int xlen;
+       int xflag;
 
        /* init the hint as "no hint provided" */
        XADaddress(xp, 0);
@@ -376,46 +377,30 @@ int extHint(struct inode *ip, s64 offset, xad_t * xp)
         */
        prev = ((offset & ~POFFSET) >> JFS_SBI(sb)->l2bsize) - nbperpage;
 
-       /* if the offsets in the first page of the file,
-        * no hint provided.
+       /* if the offset is in the first page of the file, no hint provided.
         */
        if (prev < 0)
-               return (0);
-
-       /* prepare to lookup the previous page's extent info */
-       lxdl.maxnlxd = 1;
-       lxdl.nlxd = 1;
-       lxdl.lxd = &lxd;
-       LXDoffset(&lxd, prev)
-       LXDlength(&lxd, nbperpage);
-
-       xadl.maxnxad = 1;
-       xadl.nxad = 0;
-       xadl.xad = xp;
-
-       /* perform the lookup */
-       if ((rc = xtLookupList(ip, &lxdl, &xadl, 0)))
-               return (rc);
-
-       /* check if no extent exists for the previous page.
-        * this is possible for sparse files.
-        */
-       if (xadl.nxad == 0) {
-//             assert(ISSPARSE(ip));
-               return (0);
-       }
+               goto out;
 
-       /* only preserve the abnr flag within the xad flags
-        * of the returned hint.
-        */
-       xp->flag &= XAD_NOTRECORDED;
+       rc = xtLookup(ip, prev, nbperpage, &xflag, &xaddr, &xlen, 0);
 
-       if(xadl.nxad != 1 || lengthXAD(xp) != nbperpage) {
-               jfs_error(ip->i_sb, "extHint: corrupt xtree");
-               return -EIO;
-       }
+       if ((rc == 0) && xlen) {
+               if (xlen != nbperpage) {
+                       jfs_error(ip->i_sb, "extHint: corrupt xtree");
+                       rc = -EIO;
+               }
+               XADaddress(xp, xaddr);
+               XADlength(xp, xlen);
+               /*
+                * only preserve the abnr flag within the xad flags
+                * of the returned hint.
+                */
+               xp->flag  = xflag & XAD_NOTRECORDED;
+       } else
+               rc = 0;
 
-       return (0);
+out:
+       return (rc);
 }