4 files changed, 40 insertions, 23 deletions

diff --git a/arch/m32r/kernel/irq.c b/arch/m32r/kernel/irq.c
index 3841861df6a2..f8d8650383e0 100644
--- a/arch/m32r/kernel/irq.c
+++ b/arch/m32r/kernel/irq.c
@@ -77,13 +77,16 @@ skip:
  */
 asmlinkage unsigned int do_IRQ(int irq, struct pt_regs *regs)
 {
+	struct pt_regs *old_regs;
+	old_regs = set_irq_regs(regs);
 	irq_enter();
 
 #ifdef CONFIG_DEBUG_STACKOVERFLOW
 	/* FIXME M32R */
 #endif
-	__do_IRQ(irq, regs);
+	__do_IRQ(irq);
 	irq_exit();
+	set_irq_regs(old_regs);
 
 	return 1;
 }
diff --git a/arch/m32r/kernel/smp.c b/arch/m32r/kernel/smp.c
index 8b1f6eb76870..722e21f556dc 100644
--- a/arch/m32r/kernel/smp.c
+++ b/arch/m32r/kernel/smp.c
@@ -101,7 +101,7 @@ void smp_call_function_interrupt(void);
 
 void smp_send_timer(void);
 void smp_ipi_timer_interrupt(struct pt_regs *);
-void smp_local_timer_interrupt(struct pt_regs *);
+void smp_local_timer_interrupt(void);
 
 void send_IPI_allbutself(int, int);
 static void send_IPI_mask(cpumask_t, int, int);
@@ -734,9 +734,12 @@ void smp_send_timer(void)
  *==========================================================================*/
 void smp_ipi_timer_interrupt(struct pt_regs *regs)
 {
+	struct pt_regs *old_regs;
+	old_regs = set_irq_regs(regs);
 	irq_enter();
-	smp_local_timer_interrupt(regs);
+	smp_local_timer_interrupt();
 	irq_exit();
+	set_irq_regs(old_regs);
 }
 
 /*==========================================================================*
@@ -762,9 +765,9 @@ void smp_ipi_timer_interrupt(struct pt_regs *regs)
  * ---------- --- --------------------------------------------------------
  * 2003-06-24 hy  use per_cpu structure.
  *==========================================================================*/
-void smp_local_timer_interrupt(struct pt_regs *regs)
+void smp_local_timer_interrupt(void)
 {
-	int user = user_mode(regs);
+	int user = user_mode(get_irq_regs());
 	int cpu_id = smp_processor_id();
 
 	/*
@@ -774,7 +777,7 @@ void smp_local_timer_interrupt(struct pt_regs *regs)
 	 * useful with a profiling multiplier != 1
 	 */
 
-	profile_tick(CPU_PROFILING, regs);
+	profile_tick(CPU_PROFILING);
 
 	if (--per_cpu(prof_counter, cpu_id) <= 0) {
 		/*
diff --git a/arch/m32r/kernel/sys_m32r.c b/arch/m32r/kernel/sys_m32r.c
index a9cea32eb824..b567351f3c52 100644
--- a/arch/m32r/kernel/sys_m32r.c
+++ b/arch/m32r/kernel/sys_m32r.c
@@ -25,6 +25,8 @@
 #include <asm/cachectl.h>
 #include <asm/cacheflush.h>
 #include <asm/ipc.h>
+#include <asm/syscall.h>
+#include <asm/unistd.h>
 
 /*
  * sys_tas() - test-and-set
@@ -205,7 +207,7 @@ asmlinkage int sys_uname(struct old_utsname * name)
 	if (!name)
 		return -EFAULT;
 	down_read(&uts_sem);
-	err=copy_to_user(name, &system_utsname, sizeof (*name));
+	err = copy_to_user(name, utsname(), sizeof (*name));
 	up_read(&uts_sem);
 	return err?-EFAULT:0;
 }
@@ -223,3 +225,21 @@ asmlinkage int sys_cachectl(char *addr, int nbytes, int op)
 	return -ENOSYS;
 }
 
+/*
+ * Do a system call from kernel instead of calling sys_execve so we
+ * end up with proper pt_regs.
+ */
+int kernel_execve(const char *filename, char *const argv[], char *const envp[])
+{
+	register long __scno __asm__ ("r7") = __NR_execve;
+	register long __arg3 __asm__ ("r2") = (long)(envp);
+	register long __arg2 __asm__ ("r1") = (long)(argv);
+	register long __res __asm__ ("r0") = (long)(filename);
+	__asm__ __volatile__ (
+		"trap #" SYSCALL_VECTOR "|| nop"
+		: "=r" (__res)
+		: "r" (__scno), "0" (__res), "r" (__arg2),
+			"r" (__arg3)
+		: "memory");
+	return __res;
+}
diff --git a/arch/m32r/kernel/time.c b/arch/m32r/kernel/time.c
index ded0be07a476..a09038282c78 100644
--- a/arch/m32r/kernel/time.c
+++ b/arch/m32r/kernel/time.c
@@ -35,10 +35,9 @@
 
 #ifdef CONFIG_SMP
 extern void send_IPI_allbutself(int, int);
-extern void smp_local_timer_interrupt(struct pt_regs *);
+extern void smp_local_timer_interrupt(void);
 #endif
 
-extern unsigned long wall_jiffies;
 #define TICK_SIZE	(tick_nsec / 1000)
 
 /*
@@ -108,24 +107,17 @@ void do_gettimeofday(struct timeval *tv)
 	unsigned long max_ntp_tick = tick_usec - tickadj;
 
 	do {
-		unsigned long lost;
-
 		seq = read_seqbegin(&xtime_lock);
 
 		usec = do_gettimeoffset();
-		lost = jiffies - wall_jiffies;
 
 		/*
 		 * If time_adjust is negative then NTP is slowing the clock
 		 * so make sure not to go into next possible interval.
 		 * Better to lose some accuracy than have time go backwards..
 		 */
-		if (unlikely(time_adjust < 0)) {
+		if (unlikely(time_adjust < 0))
 			usec = min(usec, max_ntp_tick);
-			if (lost)
-				usec += lost * max_ntp_tick;
-		} else if (unlikely(lost))
-			usec += lost * tick_usec;
 
 		sec = xtime.tv_sec;
 		usec += (xtime.tv_nsec / 1000);
@@ -158,7 +150,6 @@ int do_settimeofday(struct timespec *tv)
 	 * made, and then undo it!
 	 */
 	nsec -= do_gettimeoffset() * NSEC_PER_USEC;
-	nsec -= (jiffies - wall_jiffies) * TICK_NSEC;
 
 	wtm_sec = wall_to_monotonic.tv_sec + (xtime.tv_sec - sec);
 	wtm_nsec = wall_to_monotonic.tv_nsec + (xtime.tv_nsec - nsec);
@@ -197,15 +188,15 @@ static long last_rtc_update = 0;
  * timer_interrupt() needs to keep up the real-time clock,
  * as well as call the "do_timer()" routine every clocktick
  */
-irqreturn_t timer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+irqreturn_t timer_interrupt(int irq, void *dev_id)
 {
 #ifndef CONFIG_SMP
-	profile_tick(CPU_PROFILING, regs);
+	profile_tick(CPU_PROFILING);
 #endif
-	do_timer(regs);
+	do_timer(1);
 
 #ifndef CONFIG_SMP
-	update_process_times(user_mode(regs));
+	update_process_times(user_mode(get_irq_regs()));
 #endif
 	/*
 	 * If we have an externally synchronized Linux clock, then update
@@ -230,7 +221,7 @@ irqreturn_t timer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
 	   a hack, so don't look closely for now.. */
 
 #ifdef CONFIG_SMP
-	smp_local_timer_interrupt(regs);
+	smp_local_timer_interrupt();
 	smp_send_timer();
 #endif