[PARISC] More pt_regs removal

Remove pt_regs from ipi_interrupt and timer_interrupt.
Inline smp_do_timer() into its only caller, and unify the SMP and
non-SMP paths.  Fixes a profiling bug.

Signed-off-by: Matthew Wilcox <matthew@wil.cx>

arch/parisc/kernel/smp.c

@@ -154,7 +154,7 @@ halt_processor(void)
 
 
 irqreturn_t
-ipi_interrupt(int irq, void *dev_id, struct pt_regs *regs) 
+ipi_interrupt(int irq, void *dev_id) 
 {
 	int this_cpu = smp_processor_id();
 	struct cpuinfo_parisc *p = &cpu_data[this_cpu];
@@ -414,19 +414,6 @@ smp_flush_tlb_all(void)
 	on_each_cpu(flush_tlb_all_local, NULL, 1, 1);
 }
 
-
-void 
-smp_do_timer(struct pt_regs *regs)
-{
-	int cpu = smp_processor_id();
-	struct cpuinfo_parisc *data = &cpu_data[cpu];
-
-        if (!--data->prof_counter) {
-		data->prof_counter = data->prof_multiplier;
-		update_process_times(user_mode(regs));
-	}
-}
-
 /*
  * Called by secondaries to update state and initialize CPU registers.
  */

arch/parisc/kernel/time.c

@@ -34,10 +34,6 @@
 
 static unsigned long clocktick __read_mostly;	/* timer cycles per tick */
 
-#ifdef CONFIG_SMP
-extern void smp_do_timer(struct pt_regs *regs);
-#endif
-
 /*
  * We keep time on PA-RISC Linux by using the Interval Timer which is
  * a pair of registers; one is read-only and one is write-only; both
@@ -55,21 +51,22 @@ extern void smp_do_timer(struct pt_regs *regs);
  * held off for an arbitrarily long period of time by interrupts being
  * disabled, so we may miss one or more ticks.
  */
-irqreturn_t timer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+irqreturn_t timer_interrupt(int irq, void *dev_id)
 {
 	unsigned long now;
 	unsigned long next_tick;
 	unsigned long cycles_elapsed, ticks_elapsed;
 	unsigned long cycles_remainder;
 	unsigned int cpu = smp_processor_id();
+	struct cpuinfo_parisc *cpuinfo = &cpu_data[cpu];
 
 	/* gcc can optimize for "read-only" case with a local clocktick */
 	unsigned long cpt = clocktick;
 
 	profile_tick(CPU_PROFILING);
 
 	/* Initialize next_tick to the expected tick time. */
-	next_tick = cpu_data[cpu].it_value;
+	next_tick = cpuinfo->it_value;
 
 	/* Get current interval timer.
 	 * CR16 reads as 64 bits in CPU wide mode.
@@ -120,7 +117,7 @@ irqreturn_t timer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
 	 */
 	next_tick = now + cycles_remainder;
 
-	cpu_data[cpu].it_value = next_tick;
+	cpuinfo->it_value = next_tick;
 
 	/* Skip one clocktick on purpose if we are likely to miss next_tick.
 	 * We want to avoid the new next_tick being less than CR16.
@@ -131,18 +128,19 @@ irqreturn_t timer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
 		next_tick += cpt;
 
 	/* Program the IT when to deliver the next interrupt. */
-        /* Only bottom 32-bits of next_tick are written to cr16.  */
+	/* Only bottom 32-bits of next_tick are written to cr16.  */
 	mtctl(next_tick, 16);
 
 
 	/* Done mucking with unreliable delivery of interrupts.
 	 * Go do system house keeping.
 	 */
-#ifdef CONFIG_SMP
-	smp_do_timer(regs);
-#else
-	update_process_times(user_mode(regs));
-#endif
+
+	if (!--cpuinfo->prof_counter) {
+		cpuinfo->prof_counter = cpuinfo->prof_multiplier;
+		update_process_times(user_mode(get_irq_regs()));
+	}
+
 	if (cpu == 0) {
 		write_seqlock(&xtime_lock);
 		do_timer(ticks_elapsed);