From 06615f62b17d7de6e12d2f5ec6b88cf30af08413 Mon Sep 17 00:00:00 2001
From: Ralf Baechle <ralf@linux-mips.org>
Date: Thu, 23 Nov 2000 02:00:47 +0000
Subject: Merge with Linux 2.4.0-test10.

---
 arch/mips/kernel/ptrace.c | 21 ++++++++++++++++-----
 arch/mips/kernel/time.c   | 14 +++++++-------
 2 files changed, 23 insertions(+), 12 deletions(-)

(limited to 'arch/mips/kernel')

diff --git a/arch/mips/kernel/ptrace.c b/arch/mips/kernel/ptrace.c
index 4a55e2325..fcebe3fe2 100644
--- a/arch/mips/kernel/ptrace.c
+++ b/arch/mips/kernel/ptrace.c
@@ -1,12 +1,11 @@
-/* $Id: ptrace.c,v 1.17 1999/09/28 22:25:47 ralf Exp $
- *
+/*
  * This file is subject to the terms and conditions of the GNU General Public
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
  *
  * Copyright (C) 1992 Ross Biro
  * Copyright (C) Linus Torvalds
- * Copyright (C) 1994, 1995, 1996, 1997, 1998 Ralf Baechle
+ * Copyright (C) 1994, 95, 96, 97, 98, 2000 Ralf Baechle
  * Copyright (C) 1996 David S. Miller
  */
 #include <linux/kernel.h>
@@ -269,7 +268,7 @@ asmlinkage int sys_ptrace(long request, long pid, long addr, long data)
 		res = -EIO;
 		if ((unsigned long) data > _NSIG)
 			break;
-		child->ptrace &= ~(PT_PTRACED|PT_TRACESYS);
+		child->ptrace = 0;
 		child->exit_code = data;
 		write_lock_irq(&tasklist_lock);
 		REMOVE_LINKS(child);
@@ -280,6 +279,15 @@ asmlinkage int sys_ptrace(long request, long pid, long addr, long data)
 		res = 0;
 		break;
 
+	case PTRACE_SETOPTIONS: {
+		if (data & PTRACE_O_TRACESYSGOOD)
+			child->ptrace |= PT_TRACESYSGOOD;
+		else
+			child->ptrace &= ~PT_TRACESYSGOOD;
+		ret = 0;
+		break;
+	}
+
 	default:
 		res = -EIO;
 		goto out;
@@ -296,7 +304,10 @@ asmlinkage void syscall_trace(void)
 	if ((current->ptrace & (PT_PTRACED|PT_TRACESYS))
 			!= (PT_PTRACED|PT_TRACESYS))
 		return;
-	current->exit_code = SIGTRAP;
+	/* The 0x80 provides a way for the tracing parent to distinguish
+	   between a syscall stop and SIGTRAP delivery */
+	current->exit_code = SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD)
+	                                ? 0x80 : 0);
 	current->state = TASK_STOPPED;
 	notify_parent(current, SIGCHLD);
 	schedule();
diff --git a/arch/mips/kernel/time.c b/arch/mips/kernel/time.c
index 609593c6b..6b65801d5 100644
--- a/arch/mips/kernel/time.c
+++ b/arch/mips/kernel/time.c
@@ -26,7 +26,7 @@
 #include <linux/timex.h>
 
 extern volatile unsigned long wall_jiffies;
-unsigned long r4k_interval = 0;
+unsigned long r4k_interval;
 extern rwlock_t xtime_lock;
 
 /*
@@ -40,7 +40,7 @@ extern rwlock_t xtime_lock;
 
 /* Cycle counter value at the previous timer interrupt.. */
 
-static unsigned int timerhi = 0, timerlo = 0;
+static unsigned int timerhi, timerlo;
 
 /*
  * On MIPS only R4000 and better have a cycle counter.
@@ -53,14 +53,14 @@ static unsigned long do_fast_gettimeoffset(void)
 	unsigned long res, tmp;
 
 	/* Last jiffy when do_fast_gettimeoffset() was called. */
-	static unsigned long last_jiffies=0;
+	static unsigned long last_jiffies;
 	unsigned long quotient;
 
 	/*
 	 * Cached "1/(clocks per usec)*2^32" value.
 	 * It has to be recalculated once each jiffy.
 	 */
-	static unsigned long cached_quotient=0;
+	static unsigned long cached_quotient;
 
 	tmp = jiffies;
 
@@ -153,7 +153,7 @@ static unsigned long do_slow_gettimeoffset(void)
 	int count;
 
 	static int count_p = LATCH;    /* for the first call after boot */
-	static unsigned long jiffies_p = 0;
+	static unsigned long jiffies_p;
 
 	/*
 	 * cache volatile jiffies temporarily; we have IRQs turned off. 
@@ -331,7 +331,7 @@ static int set_rtc_mmss(unsigned long nowtime)
 }
 
 /* last time the cmos clock got updated */
-static long last_rtc_update = 0;
+static long last_rtc_update;
 
 /*
  * timer_interrupt() needs to keep up the real-time clock,
@@ -341,7 +341,7 @@ static void inline
 timer_interrupt(int irq, void *dev_id, struct pt_regs * regs)
 {
 #ifdef CONFIG_DDB5074
-	static unsigned cnt = 0, period = 0, dist = 0;
+	static unsigned cnt, period, dist;
 
 	if (cnt == 0 || cnt == dist)
 	    ddb5074_led_d2(1);
-- 
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