Make tree compare functions in MILFS play nicer wrt unsigned values

[Mike Belopuhov]

ok?

Index: milfs/milfs_subr.c
===================================================================
RCS file: /cvs/src/sys/milfs/milfs_subr.c,v
retrieving revision 1.6
diff -u -p -r1.6 milfs_subr.c
--- milfs/milfs_subr.c  13 Aug 2009 15:28:39 -0000      1.6
+++ milfs/milfs_subr.c  14 Aug 2009 19:50:26 -0000
@@ -39,15 +39,18 @@ SPLAY_GENERATE(milfs_inode_tree, milfs_i
 int
 milfs_block_cmp(struct milfs_block *mbp1, struct milfs_block *mbp2)
 {
-       if (mbp1->mb_offset < mbp2->mb_offset)
+       if (mbp1->mb_offset < mbp2->mb_offset) {
                if (mbp1->mb_blksize > mbp2->mb_blksize)
                        return (0);     /* 1 includes 2 */
-
-       if (mbp2->mb_offset < mbp1->mb_offset)
+               else
+                       return (-1);
+       } else if (mbp1->mb_offset > mbp2->mb_offset) {
                if (mbp2->mb_blksize > mbp1->mb_blksize)
                        return (0);     /* 2 includes 1 */
-
-       return (mbp1->mb_offset - mbp2->mb_offset);
+               else
+                       return (1);
+       }
+       return (0);
 }
 
 /*
@@ -56,7 +59,11 @@ milfs_block_cmp(struct milfs_block *mbp1
 int
 milfs_inode_cmp(struct milfs_inode *mip1, struct milfs_inode *mip2)
 {
-       return (mip1->mi_inode - mip2->mi_inode);
+       if (mip1->mi_inode > mip2->mi_inode)
+               return (1);
+       else if (mip1->mi_inode < mip2->mi_inode)
+               return (-1);
+       return (0);
 }
 
 /*