Make the sigprocmask() and geteuid() system calls MP SAFE. Expand

    commentary for copyin/copyout to indicate that they are MP SAFE as
    well.

Reviewed by: msmith

1 files changed, 13 insertions, 6 deletions

diff --git a/sys/kern/kern_sig.c b/sys/kern/kern_sig.c
index a8b7cee..e3e0e59 100644
--- a/sys/kern/kern_sig.c
+++ b/sys/kern/kern_sig.c
@@ -433,10 +433,11 @@ execsigs(p)
 }
 
 /*
- * Manipulate signal mask.
- * Note that we receive new mask, not pointer,
- * and return old mask as return value;
- * the library stub does the rest.
+ * do_sigprocmask() - MP SAFE ONLY IF p == curproc
+ *
+ *	Manipulate signal mask.  This routine is MP SAFE *ONLY* if
+ *	p == curproc.  Also remember that in order to remain MP SAFE
+ *	no spl*() calls may be made.
  */
 static int
 do_sigprocmask(p, how, set, oset, old)
@@ -452,7 +453,6 @@ do_sigprocmask(p, how, set, oset, old)
 
 	error = 0;
 	if (set != NULL) {
-		(void) splhigh();
 		switch (how) {
 		case SIG_BLOCK:
 			SIG_CANTMASK(*set);
@@ -472,11 +472,14 @@ do_sigprocmask(p, how, set, oset, old)
 			error = EINVAL;
 			break;
 		}
-		(void) spl0();
 	}
 	return (error);
 }
 
+/*
+ * sigprocmask() - MP SAFE
+ */
+
 #ifndef _SYS_SYSPROTO_H_
 struct sigprocmask_args {
 	int	how;
@@ -507,6 +510,10 @@ sigprocmask(p, uap)
 	return (error);
 }
 
+/*
+ * osigprocmask() - MP SAFE
+ */
+
 #ifndef _SYS_SYSPROTO_H_
 struct osigprocmask_args {
 	int	how;