xfs: clean up sign warnings in dir2 code

We are now consistently using unsigned char strings for names
so fix up the remaining warnings in the dir2 code to complete
the cleanup.
Signed-off-by: Dave Chinner <david@fromorbit.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>

fs/xfs/xfs_dir2.c

@@ -44,7 +44,7 @@
 #include "xfs_vnodeops.h"
 #include "xfs_trace.h"
 
-struct xfs_name xfs_name_dotdot = {"..", 2};
+struct xfs_name xfs_name_dotdot = { (unsigned char *)"..", 2};
 
 /*
  * ASCII case-insensitive (ie. A-Z) support for directories that was

fs/xfs/xfs_dir2_block.c

@@ -57,8 +57,8 @@ static xfs_dahash_t xfs_dir_hash_dot, xfs_dir_hash_dotdot;
 void
 xfs_dir_startup(void)
 {
-	xfs_dir_hash_dot = xfs_da_hashname(".", 1);
-	xfs_dir_hash_dotdot = xfs_da_hashname("..", 2);
+	xfs_dir_hash_dot = xfs_da_hashname((unsigned char *)".", 1);
+	xfs_dir_hash_dotdot = xfs_da_hashname((unsigned char *)"..", 2);
 }
 
 /*
@@ -513,8 +513,9 @@ xfs_dir2_block_getdents(
 		/*
 		 * If it didn't fit, set the final offset to here & return.
 		 */
-		if (filldir(dirent, dep->name, dep->namelen, cook & 0x7fffffff,
-			    be64_to_cpu(dep->inumber), DT_UNKNOWN)) {
+		if (filldir(dirent, (char *)dep->name, dep->namelen,
+			    cook & 0x7fffffff, be64_to_cpu(dep->inumber),
+			    DT_UNKNOWN)) {
 			*offset = cook & 0x7fffffff;
 			xfs_da_brelse(NULL, bp);
 			return 0;

fs/xfs/xfs_dir2_leaf.c

@@ -1081,7 +1081,7 @@ xfs_dir2_leaf_getdents(
 		dep = (xfs_dir2_data_entry_t *)ptr;
 		length = xfs_dir2_data_entsize(dep->namelen);
 
-		if (filldir(dirent, dep->name, dep->namelen,
+		if (filldir(dirent, (char *)dep->name, dep->namelen,
 			    xfs_dir2_byte_to_dataptr(mp, curoff) & 0x7fffffff,
 			    be64_to_cpu(dep->inumber), DT_UNKNOWN))
 			break;

fs/xfs/xfs_dir2_sf.c

@@ -782,7 +782,7 @@ xfs_dir2_sf_getdents(
 		}
 
 		ino = xfs_dir2_sf_get_inumber(sfp, xfs_dir2_sf_inumberp(sfep));
-		if (filldir(dirent, sfep->name, sfep->namelen,
+		if (filldir(dirent, (char *)sfep->name, sfep->namelen,
 			    off & 0x7fffffff, ino, DT_UNKNOWN)) {
 			*offset = off & 0x7fffffff;
 			return 0;