[PATCH] sparc32 pt_regs fixes

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

9 files changed, 43 insertions, 22 deletions

diff --git a/arch/sparc/kernel/irq.c b/arch/sparc/kernel/irq.c
index 72f0201051a0..ae4dfc89ca52 100644
--- a/arch/sparc/kernel/irq.c
+++ b/arch/sparc/kernel/irq.c
@@ -46,6 +46,7 @@
 #include <asm/pgtable.h>
 #include <asm/pcic.h>
 #include <asm/cacheflush.h>
+#include <asm/irq_regs.h>
 
 #ifdef CONFIG_SMP
 #define SMP_NOP2 "nop; nop;\n\t"
@@ -133,8 +134,8 @@ static void irq_panic(void)
     prom_halt();
 }
 
-void (*sparc_init_timers)(irqreturn_t (*)(int, void *,struct pt_regs *)) =
-    (void (*)(irqreturn_t (*)(int, void *,struct pt_regs *))) irq_panic;
+void (*sparc_init_timers)(irqreturn_t (*)(int, void *)) =
+    (void (*)(irqreturn_t (*)(int, void *))) irq_panic;
 
 /*
  * Dave Redman (djhr@tadpole.co.uk)
@@ -319,12 +320,14 @@ void unexpected_irq(int irq, void *dev_id, struct pt_regs * regs)
 
 void handler_irq(int irq, struct pt_regs * regs)
 {
+        struct pt_regs *old_regs;
         struct irqaction * action;
         int cpu = smp_processor_id();
 #ifdef CONFIG_SMP
         extern void smp4m_irq_rotate(int cpu);
 #endif
 
+        old_regs = set_irq_regs(regs);
         irq_enter();
         disable_pil_irq(irq);
 #ifdef CONFIG_SMP
@@ -338,27 +341,31 @@ void handler_irq(int irq, struct pt_regs * regs)
         do {
                 if (!action || !action->handler)
                         unexpected_irq(irq, NULL, regs);
-                action->handler(irq, action->dev_id, regs);
+                action->handler(irq, action->dev_id);
                 action = action->next;
         } while (action);
         sparc_irq[irq].flags &= ~SPARC_IRQ_INPROGRESS;
         enable_pil_irq(irq);
         irq_exit();
+        set_irq_regs(old_regs);
 }
 
 #ifdef CONFIG_BLK_DEV_FD
-extern void floppy_interrupt(int irq, void *dev_id, struct pt_regs *regs);
+extern void floppy_interrupt(int irq, void *dev_id)
 
 void sparc_floppy_irq(int irq, void *dev_id, struct pt_regs *regs)
 {
+        struct pt_regs *old_regs;
         int cpu = smp_processor_id();
 
+        old_regs = set_irq_regs(regs);
         disable_pil_irq(irq);
         irq_enter();
         kstat_cpu(cpu).irqs[irq]++;
-        floppy_interrupt(irq, dev_id, regs);
+        floppy_interrupt(irq, dev_id);
         irq_exit();
         enable_pil_irq(irq);
+        set_irq_regs(old_regs);
         // XXX Eek, it's totally changed with preempt_count() and such
         // if (softirq_pending(cpu))
         //      do_softirq();
@@ -369,7 +376,7 @@ void sparc_floppy_irq(int irq, void *dev_id, struct pt_regs *regs)
  * thus no sharing possible.
  */
 int request_fast_irq(unsigned int irq,
-                     irqreturn_t (*handler)(int, void *, struct pt_regs *),
+                     irqreturn_t (*handler)(int, void *),
                      unsigned long irqflags, const char *devname)
 {
         struct irqaction *action;
@@ -468,7 +475,7 @@ out:
 }
 
 int request_irq(unsigned int irq,
-                irqreturn_t (*handler)(int, void *, struct pt_regs *),
+                irqreturn_t (*handler)(int, void *),
                 unsigned long irqflags, const char * devname, void *dev_id)
 {
         struct irqaction * action, **actionp;
@@ -478,7 +485,7 @@ int request_irq(unsigned int irq,
         
         if (sparc_cpu_model == sun4d) {
                 extern int sun4d_request_irq(unsigned int, 
-                                             irqreturn_t (*)(int, void *, struct pt_regs *),
+                                             irqreturn_t (*)(int, void *),
                                              unsigned long, const char *, void *);
                 return sun4d_request_irq(irq, handler, irqflags, devname, dev_id);
         }
diff --git a/arch/sparc/kernel/pcic.c b/arch/sparc/kernel/pcic.c
index edb6cc665f56..b4e50ae323bf 100644
--- a/arch/sparc/kernel/pcic.c
+++ b/arch/sparc/kernel/pcic.c
@@ -708,13 +708,13 @@ static void pcic_clear_clock_irq(void)
         pcic_timer_dummy = readl(pcic0.pcic_regs+PCI_SYS_LIMIT);
 }
 
-static irqreturn_t pcic_timer_handler (int irq, void *h, struct pt_regs *regs)
+static irqreturn_t pcic_timer_handler (int irq, void *h)
 {
         write_seqlock(&xtime_lock);     /* Dummy, to show that we remember */
         pcic_clear_clock_irq();
         do_timer(1);
 #ifndef CONFIG_SMP
-        update_process_times(user_mode(regs));
+        update_process_times(user_mode(get_irq_regs()));
 #endif
         write_sequnlock(&xtime_lock);
         return IRQ_HANDLED;
diff --git a/arch/sparc/kernel/sun4c_irq.c b/arch/sparc/kernel/sun4c_irq.c
index 4be2c86ea540..2eaa0d085e19 100644
--- a/arch/sparc/kernel/sun4c_irq.c
+++ b/arch/sparc/kernel/sun4c_irq.c
@@ -154,7 +154,7 @@ static void sun4c_load_profile_irq(int cpu, unsigned int limit)
         /* Errm.. not sure how to do this.. */
 }
 
-static void __init sun4c_init_timers(irqreturn_t (*counter_fn)(int, void *, struct pt_regs *))
+static void __init sun4c_init_timers(irqreturn_t (*counter_fn)(int, void *))
 {
         int irq;
 
diff --git a/arch/sparc/kernel/sun4d_irq.c b/arch/sparc/kernel/sun4d_irq.c
index 74eed9775ac0..836d1562787a 100644
--- a/arch/sparc/kernel/sun4d_irq.c
+++ b/arch/sparc/kernel/sun4d_irq.c
@@ -38,6 +38,7 @@
 #include <asm/sbus.h>
 #include <asm/sbi.h>
 #include <asm/cacheflush.h>
+#include <asm/irq_regs.h>
 
 /* If you trust current SCSI layer to handle different SCSI IRQs, enable this. I don't trust it... -jj */
 /* #define DISTRIBUTE_IRQS */
@@ -198,6 +199,7 @@ extern void unexpected_irq(int, void *, struct pt_regs *);
 
 void sun4d_handler_irq(int irq, struct pt_regs * regs)
 {
+        struct pt_regs *old_regs;
         struct irqaction * action;
         int cpu = smp_processor_id();
         /* SBUS IRQ level (1 - 7) */
@@ -208,6 +210,7 @@ void sun4d_handler_irq(int irq, struct pt_regs * regs)
         
         cc_set_iclr(1 << irq);
         
+        old_regs = set_irq_regs(regs);
         irq_enter();
         kstat_cpu(cpu).irqs[irq]++;
         if (!sbusl) {
@@ -215,7 +218,7 @@ void sun4d_handler_irq(int irq, struct pt_regs * regs)
                 if (!action)
                         unexpected_irq(irq, NULL, regs);
                 do {
-                        action->handler(irq, action->dev_id, regs);
+                        action->handler(irq, action->dev_id);
                         action = action->next;
                 } while (action);
         } else {
@@ -242,7 +245,7 @@ void sun4d_handler_irq(int irq, struct pt_regs * regs)
                                                 if (!action)
                                                         unexpected_irq(irq, NULL, regs);
                                                 do {
-                                                        action->handler(irq, action->dev_id, regs);
+                                                        action->handler(irq, action->dev_id);
                                                         action = action->next;
                                                 } while (action);
                                                 release_sbi(SBI2DEVID(sbino), slot);
@@ -250,6 +253,7 @@ void sun4d_handler_irq(int irq, struct pt_regs * regs)
                         }
         }
         irq_exit();
+        set_irq_regs(old_regs);
 }
 
 unsigned int sun4d_build_irq(struct sbus_dev *sdev, int irq)
@@ -272,7 +276,7 @@ unsigned int sun4d_sbint_to_irq(struct sbus_dev *sdev, unsigned int sbint)
 }
 
 int sun4d_request_irq(unsigned int irq,
-                irqreturn_t (*handler)(int, void *, struct pt_regs *),
+                irqreturn_t (*handler)(int, void *),
                 unsigned long irqflags, const char * devname, void *dev_id)
 {
         struct irqaction *action, *tmp = NULL, **actionp;
@@ -466,7 +470,7 @@ static void sun4d_load_profile_irq(int cpu, unsigned int limit)
         bw_set_prof_limit(cpu, limit);
 }
 
-static void __init sun4d_init_timers(irqreturn_t (*counter_fn)(int, void *, struct pt_regs *))
+static void __init sun4d_init_timers(irqreturn_t (*counter_fn)(int, void *))
 {
         int irq;
         int cpu;
diff --git a/arch/sparc/kernel/sun4d_smp.c b/arch/sparc/kernel/sun4d_smp.c
index 3ff4edd32815..c80ea61e8ba0 100644
--- a/arch/sparc/kernel/sun4d_smp.c
+++ b/arch/sparc/kernel/sun4d_smp.c
@@ -23,6 +23,7 @@
 
 #include <asm/ptrace.h>
 #include <asm/atomic.h>
+#include <asm/irq_regs.h>
 
 #include <asm/delay.h>
 #include <asm/irq.h>
@@ -369,10 +370,12 @@ void smp4d_message_pass(int target, int msg, unsigned long data, int wait)
 
 void smp4d_percpu_timer_interrupt(struct pt_regs *regs)
 {
+        struct pt_regs *old_regs;
         int cpu = hard_smp4d_processor_id();
         static int cpu_tick[NR_CPUS];
         static char led_mask[] = { 0xe, 0xd, 0xb, 0x7, 0xb, 0xd };
 
+        old_regs = set_irq_regs(regs);
         bw_get_prof_limit(cpu); 
         bw_clear_intr_mask(0, 1);       /* INTR_TABLE[0] & 1 is Profile IRQ */
 
@@ -384,7 +387,7 @@ void smp4d_percpu_timer_interrupt(struct pt_regs *regs)
                 show_leds(cpu);
         }
 
-        profile_tick(CPU_PROFILING, regs);
+        profile_tick(CPU_PROFILING);
 
         if(!--prof_counter(cpu)) {
                 int user = user_mode(regs);
@@ -395,6 +398,7 @@ void smp4d_percpu_timer_interrupt(struct pt_regs *regs)
 
                 prof_counter(cpu) = prof_multiplier(cpu);
         }
+        set_irq_regs(old_regs);
 }
 
 extern unsigned int lvl14_resolution;
diff --git a/arch/sparc/kernel/sun4m_irq.c b/arch/sparc/kernel/sun4m_irq.c
index 7cefa301efea..28bcf8e2c5b3 100644
--- a/arch/sparc/kernel/sun4m_irq.c
+++ b/arch/sparc/kernel/sun4m_irq.c
@@ -228,7 +228,7 @@ static void sun4m_load_profile_irq(int cpu, unsigned int limit)
         sun4m_timers->cpu_timers[cpu].l14_timer_limit = limit;
 }
 
-static void __init sun4m_init_timers(irqreturn_t (*counter_fn)(int, void *, struct pt_regs *))
+static void __init sun4m_init_timers(irqreturn_t (*counter_fn)(int, void *))
 {
         int reg_count, irq, cpu;
         struct linux_prom_registers cnt_regs[PROMREG_MAX];
diff --git a/arch/sparc/kernel/sun4m_smp.c b/arch/sparc/kernel/sun4m_smp.c
index 7d4a649138f6..e2d9c018bd56 100644
--- a/arch/sparc/kernel/sun4m_smp.c
+++ b/arch/sparc/kernel/sun4m_smp.c
@@ -19,6 +19,7 @@
 #include <linux/profile.h>
 #include <asm/cacheflush.h>
 #include <asm/tlbflush.h>
+#include <asm/irq_regs.h>
 
 #include <asm/ptrace.h>
 #include <asm/atomic.h>
@@ -353,11 +354,14 @@ void smp4m_cross_call_irq(void)
 
 void smp4m_percpu_timer_interrupt(struct pt_regs *regs)
 {
+        struct pt_regs *old_regs;
         int cpu = smp_processor_id();
 
+        old_regs = set_irq_regs(regs);
+
         clear_profile_irq(cpu);
 
-        profile_tick(CPU_PROFILING, regs);
+        profile_tick(CPU_PROFILING);
 
         if(!--prof_counter(cpu)) {
                 int user = user_mode(regs);
@@ -368,6 +372,7 @@ void smp4m_percpu_timer_interrupt(struct pt_regs *regs)
 
                 prof_counter(cpu) = prof_multiplier(cpu);
         }
+        set_irq_regs(old_regs);
 }
 
 extern unsigned int lvl14_resolution;
diff --git a/arch/sparc/kernel/tick14.c b/arch/sparc/kernel/tick14.c
index d3b4daac705f..7107d2f0625d 100644
--- a/arch/sparc/kernel/tick14.c
+++ b/arch/sparc/kernel/tick14.c
@@ -55,7 +55,7 @@ void install_obp_ticker(void)
         linux_lvl14[3] =  obp_lvl14[3]; 
 }
 
-void claim_ticker14(irqreturn_t (*handler)(int, void *, struct pt_regs *),
+void claim_ticker14(irqreturn_t (*handler)(int, void *),
                     int irq_nr, unsigned int timeout )
 {
         int cpu = smp_processor_id();
diff --git a/arch/sparc/kernel/time.c b/arch/sparc/kernel/time.c
index e10dc831944d..7dcd1a16c6e4 100644
--- a/arch/sparc/kernel/time.c
+++ b/arch/sparc/kernel/time.c
@@ -42,6 +42,7 @@
 #include <asm/page.h>
 #include <asm/pcic.h>
 #include <asm/of_device.h>
+#include <asm/irq_regs.h>
 
 DEFINE_SPINLOCK(rtc_lock);
 enum sparc_clock_type sp_clock_typ;
@@ -104,13 +105,13 @@ __volatile__ unsigned int *master_l10_limit;
 
 #define TICK_SIZE (tick_nsec / 1000)
 
-irqreturn_t timer_interrupt(int irq, void *dev_id, struct pt_regs * regs)
+irqreturn_t timer_interrupt(int irq, void *dev_id)
 {
         /* last time the cmos clock got updated */
         static long last_rtc_update;
 
 #ifndef CONFIG_SMP
-        profile_tick(CPU_PROFILING, regs);
+        profile_tick(CPU_PROFILING);
 #endif
 
         /* Protect counter clear so that do_gettimeoffset works */
@@ -128,7 +129,7 @@ irqreturn_t timer_interrupt(int irq, void *dev_id, struct pt_regs * regs)
 
         do_timer(1);
 #ifndef CONFIG_SMP
-        update_process_times(user_mode(regs));
+        update_process_times(user_mode(get_irq_regs()));
 #endif