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;

module/os/freebsd/zfs/kmod_core.c

@@ -106,11 +106,6 @@ SYSCTL_INT(_vfs_zfs_version, OID_AUTO, ioctl, CTLFLAG_RD, &zfs_version_ioctl,
 
 static struct cdev *zfsdev;
 
-extern void zfs_init(void);
-extern void zfs_fini(void);
-extern void zfs_ioctl_init(void);
-
-
 static struct root_hold_token *zfs_root_token;
 
 extern uint_t rrw_tsd_key;

module/os/freebsd/zfs/spa_os.c

@@ -37,6 +37,7 @@
 #include <sys/zil.h>
 #include <sys/ddt.h>
 #include <sys/vdev_impl.h>
+#include <sys/vdev_os.h>
 #include <sys/vdev_removal.h>
 #include <sys/vdev_indirect_mapping.h>
 #include <sys/vdev_indirect_births.h>
@@ -72,9 +73,6 @@
 #include "zfs_prop.h"
 #include "zfs_comutil.h"
 
-extern int vdev_geom_read_pool_label(const char *name, nvlist_t ***configs,
-    uint64_t *count);
-
 static nvlist_t *
 spa_generate_rootconf(const char *name)
 {

module/os/freebsd/zfs/vdev_geom.c

@@ -32,6 +32,7 @@
 #include <sys/spa.h>
 #include <sys/spa_impl.h>
 #include <sys/vdev_impl.h>
+#include <sys/vdev_os.h>
 #include <sys/fs/zfs.h>
 #include <sys/zio.h>
 #include <geom/geom.h>