- Add a kern_semctl() helper function for __semctl(). It accepts a pointer

  to a copied-in copy of the 'union semun' and a uioseg to indicate which
  memory space the 'buf' pointer of the union points to.  This is then used
  in linux_semctl() and svr4_sys_semctl() to eliminate use of the stackgap.
- Mark linux_ipc() and svr4_sys_semsys() MPSAFE.

1 files changed, 3 insertions, 0 deletions

diff --git a/sys/sys/syscallsubr.h b/sys/sys/syscallsubr.h
index 7329f6c..d4f818b 100644
--- a/sys/sys/syscallsubr.h
+++ b/sys/sys/syscallsubr.h
@@ -41,6 +41,7 @@ struct msghdr;
 struct msqid_ds;
 struct rlimit;
 struct rusage;
+union semun;
 struct sockaddr;
 struct stat;
 struct kevent;
@@ -123,6 +124,8 @@ int	kern_rename(struct thread *td, char *from, char *to,
 int	kern_rmdir(struct thread *td, char *path, enum uio_seg pathseg);
 int	kern_sched_rr_get_interval(struct thread *td, pid_t pid,
 	    struct timespec *ts);
+int	kern_semctl(struct thread *td, int semid, int semnum, int cmd,
+	    union semun *arg, enum uio_seg bufseg);
 int	kern_select(struct thread *td, int nd, fd_set *fd_in, fd_set *fd_ou,
 	    fd_set *fd_ex, struct timeval *tvp);
 int	kern_sendfile(struct thread *td, struct sendfile_args *uap,