protect printf with a mutex instead of SIMPLELOCK.

1 files changed, 10 insertions, 48 deletions

diff --git a/sys/kern/subr_prf.c b/sys/kern/subr_prf.c
index a843c2f1dc2..e4d04aa0bc7 100644
--- a/sys/kern/subr_prf.c
+++ b/sys/kern/subr_prf.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: subr_prf.c,v 1.59 2004/06/13 21:49:26 niklas Exp $	*/
+/*	$OpenBSD: subr_prf.c,v 1.60 2004/07/20 20:19:52 art Exp $	*/
 /*	$NetBSD: subr_prf.c,v 1.45 1997/10/24 18:14:25 chuck Exp $	*/
 
 /*-
@@ -47,12 +47,12 @@
 #include <sys/ioctl.h>
 #include <sys/vnode.h>
 #include <sys/file.h>
-#include <sys/simplelock.h>
 #include <sys/tty.h>
 #include <sys/tprintf.h>
 #include <sys/syslog.h>
 #include <sys/malloc.h>
 #include <sys/pool.h>
+#include <sys/mutex.h>
 
 #include <dev/cons.h>
 
@@ -98,49 +98,7 @@ extern int uvm_doswapencrypt;
 int	 kprintf(const char *, int, void *, char *, va_list);
 void	 kputchar(int, int, struct tty *);
 
-#ifdef MULTIPROCESSOR
-
-#ifdef notdef
-
-struct simplelock kprintf_slock;
-
-#define KPRINTF_MUTEX_ENTER(s)						\
-do {									\
-	(s) = splhigh();						\
-	simple_lock(&kprintf_slock);					\
-} while (/*CONSTCOND*/0)
-
-#define KPRINTF_MUTEX_EXIT(s)						\
-do {									\
-	simple_unlock(&kprintf_slock);					\
-	splx((s));							\
-} while (/*CONSTCOND*/0)
-
-#else
-
-struct __mp_lock kprintf_slock;
-
-#define KPRINTF_MUTEX_ENTER(s)						\
-do {									\
-	(s) = splhigh();						\
-	__mp_lock(&kprintf_slock);					\
-} while (/*CONSTCOND*/0)
-
-#define KPRINTF_MUTEX_EXIT(s)						\
-do {									\
-	__mp_unlock(&kprintf_slock);					\
-	splx((s));							\
-} while (/*CONSTCOND*/0)
-
-#endif
-
-#else
-
-struct simplelock kprintf_slock;
-#define KPRINTF_MUTEX_ENTER(s) (s) = splhigh()
-#define KPRINTF_MUTEX_EXIT(s) splx((s))
-
-#endif /* MULTIPROCESSOR */
+struct mutex kprintf_mutex = MUTEX_INITIALIZER(IPL_HIGH);
 
 /*
  * globals
@@ -551,9 +509,8 @@ printf(const char *fmt, ...)
 {
 	va_list ap;
 	int savintr, retval;
-	int s;
 
-	KPRINTF_MUTEX_ENTER(s);
+	mtx_enter(&kprintf_mutex);
 
 	savintr = consintr;		/* disable interrupts */
 	consintr = 0;
@@ -564,7 +521,7 @@ printf(const char *fmt, ...)
 		logwakeup();
 	consintr = savintr;		/* reenable interrupts */
 
-	KPRINTF_MUTEX_EXIT(s);
+	mtx_leave(&kprintf_mutex);
 
 	return(retval);
 }
@@ -579,12 +536,17 @@ vprintf(const char *fmt, va_list ap)
 {
 	int savintr, retval;
 
+	mtx_enter(&kprintf_mutex);
+
 	savintr = consintr;		/* disable interrupts */
 	consintr = 0;
 	retval = kprintf(fmt, TOCONS | TOLOG, NULL, NULL, ap);
 	if (!panicstr)
 		logwakeup();
 	consintr = savintr;		/* reenable interrupts */
+
+	mtx_leave(&kprintf_mutex);
+
 	return (retval);
 }