3 files changed, 21 insertions, 18 deletions

diff --git a/arch/x86_64/kernel/apic.c b/arch/x86_64/kernel/apic.c
index 6472e321cad7..af4a1c71a80d 100644
--- a/arch/x86_64/kernel/apic.c
+++ b/arch/x86_64/kernel/apic.c
@@ -885,14 +885,14 @@ void setup_APIC_extened_lvt(unsigned char lvt_off, unsigned char vector,
  * value into /proc/profile.
  */
 
-void smp_local_timer_interrupt(struct pt_regs *regs)
+void smp_local_timer_interrupt(void)
 {
-        profile_tick(CPU_PROFILING, regs);
+        profile_tick(CPU_PROFILING);
 #ifdef CONFIG_SMP
-        update_process_times(user_mode(regs));
+        update_process_times(user_mode(get_irq_regs()));
 #endif
         if (apic_runs_main_timer > 1 && smp_processor_id() == boot_cpu_id)
-                main_timer_handler(regs);
+                main_timer_handler();
         /*
          * We take the 'long' return path, and there every subsystem
          * grabs the appropriate locks (kernel lock/ irq lock).
@@ -913,7 +913,7 @@ void smp_local_timer_interrupt(struct pt_regs *regs)
  * [ if a single-CPU system runs an SMP kernel then we call the local
  *   interrupt as well. Thus we cannot inline the local irq ... ]
  */
-void smp_apic_timer_interrupt(struct pt_regs *regs)
+void smp_apic_timer_interrupt(void)
 {
         /*
          * the NMI deadlock-detector uses this.
@@ -932,7 +932,7 @@ void smp_apic_timer_interrupt(struct pt_regs *regs)
          */
         exit_idle();
         irq_enter();
-        smp_local_timer_interrupt(regs);
+        smp_local_timer_interrupt();
         irq_exit();
 }
 
diff --git a/arch/x86_64/kernel/irq.c b/arch/x86_64/kernel/irq.c
index 506f27c85ca5..b8a407fcd5d5 100644
--- a/arch/x86_64/kernel/irq.c
+++ b/arch/x86_64/kernel/irq.c
@@ -103,7 +103,9 @@ skip:
  * handlers).
  */
 asmlinkage unsigned int do_IRQ(struct pt_regs *regs)
-{       
+{
+        struct pt_regs *old_regs = set_irq_regs(regs);
+
         /* high bit used in ret_from_ code  */
         unsigned vector = ~regs->orig_rax;
         unsigned irq;
@@ -121,9 +123,10 @@ asmlinkage unsigned int do_IRQ(struct pt_regs *regs)
 #ifdef CONFIG_DEBUG_STACKOVERFLOW
         stack_overflow_check(regs);
 #endif
-        generic_handle_irq(irq, regs);
+        generic_handle_irq(irq);
         irq_exit();
 
+        set_irq_regs(old_regs);
         return 1;
 }
 
diff --git a/arch/x86_64/kernel/time.c b/arch/x86_64/kernel/time.c
index 557e92af7bea..1ba5a442ac32 100644
--- a/arch/x86_64/kernel/time.c
+++ b/arch/x86_64/kernel/time.c
@@ -302,20 +302,20 @@ unsigned long long monotonic_clock(void)
 }
 EXPORT_SYMBOL(monotonic_clock);
 
-static noinline void handle_lost_ticks(int lost, struct pt_regs *regs)
+static noinline void handle_lost_ticks(int lost)
 {
         static long lost_count;
         static int warned;
         if (report_lost_ticks) {
                 printk(KERN_WARNING "time.c: Lost %d timer tick(s)! ", lost);
-                print_symbol("rip %s)\n", regs->rip);
+                print_symbol("rip %s)\n", get_irq_regs()->rip);
         }
 
         if (lost_count == 1000 && !warned) {
                 printk(KERN_WARNING "warning: many lost ticks.\n"
                        KERN_WARNING "Your time source seems to be instable or "
                                 "some driver is hogging interupts\n");
-                print_symbol("rip %s\n", regs->rip);
+                print_symbol("rip %s\n", get_irq_regs()->rip);
                 if (vxtime.mode == VXTIME_TSC && vxtime.hpet_address) {
                         printk(KERN_WARNING "Falling back to HPET\n");
                         if (hpet_use_timer)
@@ -339,7 +339,7 @@ static noinline void handle_lost_ticks(int lost, struct pt_regs *regs)
 #endif
 }
 
-void main_timer_handler(struct pt_regs *regs)
+void main_timer_handler(void)
 {
         static unsigned long rtc_update = 0;
         unsigned long tsc;
@@ -411,7 +411,7 @@ void main_timer_handler(struct pt_regs *regs)
         }
 
         if (lost > 0)
-                handle_lost_ticks(lost, regs);
+                handle_lost_ticks(lost);
         else
                 lost = 0;
 
@@ -421,7 +421,7 @@ void main_timer_handler(struct pt_regs *regs)
 
         do_timer(lost + 1);
 #ifndef CONFIG_SMP
-        update_process_times(user_mode(regs));
+        update_process_times(user_mode(get_irq_regs()));
 #endif
 
 /*
@@ -431,7 +431,7 @@ void main_timer_handler(struct pt_regs *regs)
  */
 
         if (!using_apic_timer)
-                smp_local_timer_interrupt(regs);
+                smp_local_timer_interrupt();
 
 /*
  * If we have an externally synchronized Linux clock, then update CMOS clock
@@ -450,11 +450,11 @@ void main_timer_handler(struct pt_regs *regs)
         write_sequnlock(&xtime_lock);
 }
 
-static irqreturn_t timer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+static irqreturn_t timer_interrupt(int irq, void *dev_id)
 {
         if (apic_runs_main_timer > 1)
                 return IRQ_HANDLED;
-        main_timer_handler(regs);
+        main_timer_handler();
         if (using_apic_timer)
                 smp_send_timer_broadcast_ipi();
         return IRQ_HANDLED;
@@ -1337,7 +1337,7 @@ irqreturn_t hpet_rtc_interrupt(int irq, void *dev_id, struct pt_regs *regs)
         }
         if (call_rtc_interrupt) {
                 rtc_int_flag |= (RTC_IRQF | (RTC_NUM_INTS << 8));
-                rtc_interrupt(rtc_int_flag, dev_id, regs);
+                rtc_interrupt(rtc_int_flag, dev_id);
         }
         return IRQ_HANDLED;
 }