nfsd: constify nfsd_suppatttrs

To keep me from accidentally writing to this again....
Signed-off-by: J. Bruce Fields <bfields@redhat.com>

fs/nfsd/nfs4xdr.c

@@ -58,7 +58,7 @@
 
 #define NFSDDBG_FACILITY		NFSDDBG_XDR
 
-u32 nfsd_suppattrs[3][3] = {
+const u32 nfsd_suppattrs[3][3] = {
 	{NFSD4_SUPPORTED_ATTRS_WORD0,
 	 NFSD4_SUPPORTED_ATTRS_WORD1,
 	 NFSD4_SUPPORTED_ATTRS_WORD2},

fs/nfsd/nfsd.h

@@ -362,16 +362,16 @@ void		nfsd_lockd_shutdown(void);
 	FATTR4_WORD2_MODE_UMASK | \
 	NFSD4_2_SECURITY_ATTRS)
 
-extern u32 nfsd_suppattrs[3][3];
+extern const u32 nfsd_suppattrs[3][3];
 
-static inline bool bmval_is_subset(u32 *bm1, u32 *bm2)
+static inline bool bmval_is_subset(const u32 *bm1, const u32 *bm2)
 {
 	return !((bm1[0] & ~bm2[0]) ||
 	         (bm1[1] & ~bm2[1]) ||
 		 (bm1[2] & ~bm2[2]));
 }
 
-static inline bool nfsd_attrs_supported(u32 minorversion, u32 *bmval)
+static inline bool nfsd_attrs_supported(u32 minorversion, const u32 *bmval)
 {
 	return bmval_is_subset(bmval, nfsd_suppattrs[minorversion]);
 }