Add prototypes

Add prototypes/move prototypes to header files.

Reviewed-by: Ryan Moeller <ryan@iXsystems.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>
Closes #10470

module/os/freebsd/spl/acl_common.c

@@ -159,7 +159,7 @@ typedef struct ace_list {
  *	returns (-1 = less than, 0 = equal, 1 = greater than
  */
 void
-ksort(caddr_t v, int n, int s, int (*f)())
+ksort(caddr_t v, int n, int s, int (*f)(void *, void *))
 {
 	int g, i, j, ii;
 	unsigned int *p1, *p2;

module/os/freebsd/spl/callb.c

@@ -52,7 +52,8 @@ typedef struct callb {
 	char		c_flag;		/* info about the callb state */
 	uchar_t		c_class;	/* this callb's class */
 	kcondvar_t	c_done_cv;	/* signal callb completion */
-	boolean_t	(*c_func)();	/* cb function: returns true if ok */
+	boolean_t	(*c_func)(void *, int);
+					/* cb function: returns true if ok */
 	void		*c_arg;		/* arg to c_func */
 	char		c_name[CB_MAXNAME+1]; /* debug:max func name length */
 } callb_t;