Index: head/sys/compat/linux/linux_misc.c
===================================================================
--- head/sys/compat/linux/linux_misc.c
+++ head/sys/compat/linux/linux_misc.c
@@ -1599,14 +1599,11 @@
 	return (0);
 }
 
-
 int
 linux_getsid(struct thread *td, struct linux_getsid_args *args)
 {
-	struct getsid_args bsd;
 
-	bsd.pid = args->pid;
-	return (sys_getsid(td, &bsd));
+	return (kern_getsid(td, args->pid));
 }
 
 int
Index: head/sys/kern/kern_prot.c
===================================================================
--- head/sys/kern/kern_prot.c
+++ head/sys/kern/kern_prot.c
@@ -190,14 +190,21 @@
 int
 sys_getsid(struct thread *td, struct getsid_args *uap)
 {
+
+	return (kern_getsid(td, uap->pid));
+}
+
+int
+kern_getsid(struct thread *td, pid_t pid)
+{
 	struct proc *p;
 	int error;
 
-	if (uap->pid == 0) {
+	if (pid == 0) {
 		p = td->td_proc;
 		PROC_LOCK(p);
 	} else {
-		p = pfind(uap->pid);
+		p = pfind(pid);
 		if (p == NULL)
 			return (ESRCH);
 		error = p_cansee(td, p);
Index: head/sys/sys/syscallsubr.h
===================================================================
--- head/sys/sys/syscallsubr.h
+++ head/sys/sys/syscallsubr.h
@@ -140,6 +140,7 @@
 int	kern_getpeername(struct thread *td, int fd, struct sockaddr **sa,
 	    socklen_t *alen);
 int	kern_getrusage(struct thread *td, int who, struct rusage *rup);
+int	kern_getsid(struct thread *td, pid_t pid);
 int	kern_getsockname(struct thread *td, int fd, struct sockaddr **sa,
 	    socklen_t *alen);
 int	kern_getsockopt(struct thread *td, int s, int level, int name,