[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>

1 files changed, 11 insertions, 13 deletions

diff --git a/arch/parisc/kernel/time.c b/arch/parisc/kernel/time.c
index 8c9b8a7ef244..bad7d1eb62b9 100644
--- a/arch/parisc/kernel/time.c
+++ b/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
@@ -55,13 +51,14 @@ 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;
@@ -69,7 +66,7 @@ irqreturn_t timer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
         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);