cpuset(2): add kern_cpuset

Effort:		CHERI upstreaming
Sponsored by:	 Innovate UK
Pull Request:	https://github.com/freebsd/freebsd-src/pull/2284

sys/kern/kern_cpuset.c

@@ -1843,6 +1843,12 @@ struct cpuset_args {
 #endif
 int
 sys_cpuset(struct thread *td, struct cpuset_args *uap)
+{
+	return (kern_cpuset(td, uap->setid));
+}
+
+int
+kern_cpuset(struct thread *td, cpusetid_t *setid)
 {
 	struct cpuset *root;
 	struct cpuset *set;
@@ -1856,7 +1862,7 @@ sys_cpuset(struct thread *td, struct cpuset_args *uap)
 	cpuset_rel(root);
 	if (error)
 		return (error);
-	error = copyout(&set->cs_id, uap->setid, sizeof(set->cs_id));
+	error = copyout(&set->cs_id, setid, sizeof(set->cs_id));
 	if (error == 0)
 		error = cpuset_setproc(-1, set, NULL, NULL, false);
 	cpuset_rel(set);
@@ -1873,7 +1879,6 @@ struct cpuset_setid_args {
 int
 sys_cpuset_setid(struct thread *td, struct cpuset_setid_args *uap)
 {
-
 	return (kern_cpuset_setid(td, uap->which, uap->id, uap->setid));
 }
 

sys/sys/syscallsubr.h

@@ -151,6 +151,7 @@ int	kern_connectat(struct thread *td, int dirfd, int fd,
 	    struct sockaddr *sa);
 int	kern_copy_file_range(struct thread *td, int infd, off_t *inoffp,
 	    int outfd, off_t *outoffp, size_t len, unsigned int flags);
+int	kern_cpuset(struct thread *td, cpusetid_t *setid);
 int	kern_cpuset_getaffinity(struct thread *td, cpulevel_t level,
 	    cpuwhich_t which, id_t id, size_t cpusetsize, cpuset_t *mask);
 int	kern_cpuset_setaffinity(struct thread *td, cpulevel_t level,