void regcache_raw_write_part (struct regcache *regcache, int regnum,
int offset, int len, const gdb_byte *buf);
-int regcache_valid_p (struct regcache *regcache, int regnum);
+int regcache_valid_p (const struct regcache *regcache, int regnum);
/* Transfer a cooked register [0..NUM_REGS+NUM_PSEUDO_REGS). */
void regcache_cooked_read (struct regcache *regcache, int rawnum,