15 files changed, 47 insertions, 49 deletions

diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c
index c3f58f2f9f52..5deaab3090b4 100644
--- a/arch/powerpc/kernel/irq.c
+++ b/arch/powerpc/kernel/irq.c
@@ -187,6 +187,7 @@ void fixup_irqs(cpumask_t map)
 
 void do_IRQ(struct pt_regs *regs)
 {
+        struct pt_regs *old_regs = set_irq_regs(regs);
         unsigned int irq;
 #ifdef CONFIG_IRQSTACKS
         struct thread_info *curtp, *irqtp;
@@ -230,18 +231,19 @@ void do_IRQ(struct pt_regs *regs)
                                 handler = &__do_IRQ;
                         irqtp->task = curtp->task;
                         irqtp->flags = 0;
-                        call_handle_irq(irq, desc, regs, irqtp, handler);
+                        call_handle_irq(irq, desc, irqtp, handler);
                         irqtp->task = NULL;
                         if (irqtp->flags)
                                 set_bits(irqtp->flags, &curtp->flags);
                 } else
 #endif
-                        generic_handle_irq(irq, regs);
+                        generic_handle_irq(irq);
         } else if (irq != NO_IRQ_IGNORE)
                 /* That's not SMP safe ... but who cares ? */
                 ppc_spurious_interrupts++;
 
         irq_exit();
+        set_irq_regs(old_regs);
 
 #ifdef CONFIG_PPC_ISERIES
         if (get_lppaca()->int_dword.fields.decr_int) {
diff --git a/arch/powerpc/kernel/misc_64.S b/arch/powerpc/kernel/misc_64.S
index 41521b30c3cd..c70e20708a1f 100644
--- a/arch/powerpc/kernel/misc_64.S
+++ b/arch/powerpc/kernel/misc_64.S
@@ -52,12 +52,12 @@ _GLOBAL(call_do_softirq)
         blr
 
 _GLOBAL(call_handle_irq)
-        ld      r8,0(r7)
+        ld      r8,0(r6)
         mflr    r0
         std     r0,16(r1)
         mtctr   r8
-        stdu    r1,THREAD_SIZE-112(r6)
-        mr      r1,r6
+        stdu    r1,THREAD_SIZE-112(r5)
+        mr      r1,r5
         bctrl
         ld      r1,0(r1)
         ld      r0,16(r1)
diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c
index 6a9bc9ce54e0..35c6309bdb76 100644
--- a/arch/powerpc/kernel/smp.c
+++ b/arch/powerpc/kernel/smp.c
@@ -115,7 +115,7 @@ void __devinit smp_generic_kick_cpu(int nr)
 }
 #endif
 
-void smp_message_recv(int msg, struct pt_regs *regs)
+void smp_message_recv(int msg)
 {
         switch(msg) {
         case PPC_MSG_CALL_FUNCTION:
@@ -127,11 +127,11 @@ void smp_message_recv(int msg, struct pt_regs *regs)
                 break;
         case PPC_MSG_DEBUGGER_BREAK:
                 if (crash_ipi_function_ptr) {
-                        crash_ipi_function_ptr(regs);
+                        crash_ipi_function_ptr(get_irq_regs());
                         break;
                 }
 #ifdef CONFIG_DEBUGGER
-                debugger_ipi(regs);
+                debugger_ipi(get_irq_regs());
                 break;
 #endif /* CONFIG_DEBUGGER */
                 /* FALLTHROUGH */
diff --git a/arch/powerpc/kernel/time.c b/arch/powerpc/kernel/time.c
index 85b9244a098c..d210d0a5006b 100644
--- a/arch/powerpc/kernel/time.c
+++ b/arch/powerpc/kernel/time.c
@@ -51,6 +51,7 @@
 #include <linux/rtc.h>
 #include <linux/jiffies.h>
 #include <linux/posix-timers.h>
+#include <linux/irq.h>
 
 #include <asm/io.h>
 #include <asm/processor.h>
@@ -643,6 +644,7 @@ static void iSeries_tb_recal(void)
  */
 void timer_interrupt(struct pt_regs * regs)
 {
+        struct pt_regs *old_regs;
         int next_dec;
         int cpu = smp_processor_id();
         unsigned long ticks;
@@ -653,9 +655,10 @@ void timer_interrupt(struct pt_regs * regs)
                 do_IRQ(regs);
 #endif
 
+        old_regs = set_irq_regs(regs);
         irq_enter();
 
-        profile_tick(CPU_PROFILING, regs);
+        profile_tick(CPU_PROFILING);
         calculate_steal_time();
 
 #ifdef CONFIG_PPC_ISERIES
@@ -715,6 +718,7 @@ void timer_interrupt(struct pt_regs * regs)
 #endif
 
         irq_exit();
+        set_irq_regs(old_regs);
 }
 
 void wakeup_decrementer(void)
diff --git a/arch/powerpc/platforms/cell/interrupt.c b/arch/powerpc/platforms/cell/interrupt.c
index 8533f13a5ed1..434fb934dd20 100644
--- a/arch/powerpc/platforms/cell/interrupt.c
+++ b/arch/powerpc/platforms/cell/interrupt.c
@@ -190,11 +190,11 @@ struct irq_host *iic_get_irq_host(int node)
 EXPORT_SYMBOL_GPL(iic_get_irq_host);
 
 
-static irqreturn_t iic_ipi_action(int irq, void *dev_id, struct pt_regs *regs)
+static irqreturn_t iic_ipi_action(int irq, void *dev_id)
 {
         int ipi = (int)(long)dev_id;
 
-        smp_message_recv(ipi, regs);
+        smp_message_recv(ipi);
 
         return IRQ_HANDLED;
 }
diff --git a/arch/powerpc/platforms/cell/spider-pic.c b/arch/powerpc/platforms/cell/spider-pic.c
index b0e95d594c51..21a9ebd4978e 100644
--- a/arch/powerpc/platforms/cell/spider-pic.c
+++ b/arch/powerpc/platforms/cell/spider-pic.c
@@ -213,8 +213,7 @@ static struct irq_host_ops spider_host_ops = {
         .xlate = spider_host_xlate,
 };
 
-static void spider_irq_cascade(unsigned int irq, struct irq_desc *desc,
-                               struct pt_regs *regs)
+static void spider_irq_cascade(unsigned int irq, struct irq_desc *desc)
 {
         struct spider_pic *pic = desc->handler_data;
         unsigned int cs, virq;
@@ -225,7 +224,7 @@ static void spider_irq_cascade(unsigned int irq, struct irq_desc *desc,
         else
                 virq = irq_linear_revmap(pic->host, cs);
         if (virq != NO_IRQ)
-                generic_handle_irq(virq, regs);
+                generic_handle_irq(virq);
         desc->chip->eoi(irq);
 }
 
diff --git a/arch/powerpc/platforms/powermac/low_i2c.c b/arch/powerpc/platforms/powermac/low_i2c.c
index c2c7cf75dd5f..bfc4829162f1 100644
--- a/arch/powerpc/platforms/powermac/low_i2c.c
+++ b/arch/powerpc/platforms/powermac/low_i2c.c
@@ -342,7 +342,7 @@ static void kw_i2c_handle_interrupt(struct pmac_i2c_host_kw *host, u8 isr)
 }
 
 /* Interrupt handler */
-static irqreturn_t kw_i2c_irq(int irq, void *dev_id, struct pt_regs *regs)
+static irqreturn_t kw_i2c_irq(int irq, void *dev_id)
 {
         struct pmac_i2c_host_kw *host = dev_id;
         unsigned long flags;
diff --git a/arch/powerpc/platforms/powermac/pfunc_base.c b/arch/powerpc/platforms/powermac/pfunc_base.c
index ee3b223ab17a..5c6c15c5f9a3 100644
--- a/arch/powerpc/platforms/powermac/pfunc_base.c
+++ b/arch/powerpc/platforms/powermac/pfunc_base.c
@@ -15,7 +15,7 @@
 #define DBG(fmt...)
 #endif
 
-static irqreturn_t macio_gpio_irq(int irq, void *data, struct pt_regs *regs)
+static irqreturn_t macio_gpio_irq(int irq, void *data)
 {
         pmf_do_irq(data);
 
diff --git a/arch/powerpc/platforms/powermac/pic.c b/arch/powerpc/platforms/powermac/pic.c
index 39f7ddb554ea..e93a115961aa 100644
--- a/arch/powerpc/platforms/powermac/pic.c
+++ b/arch/powerpc/platforms/powermac/pic.c
@@ -440,14 +440,13 @@ static void __init pmac_pic_probe_oldstyle(void)
 }
 #endif /* CONFIG_PPC32 */
 
-static void pmac_u3_cascade(unsigned int irq, struct irq_desc *desc,
-                            struct pt_regs *regs)
+static void pmac_u3_cascade(unsigned int irq, struct irq_desc *desc)
 {
         struct mpic *mpic = desc->handler_data;
 
-        unsigned int cascade_irq = mpic_get_one_irq(mpic, regs);
+        unsigned int cascade_irq = mpic_get_one_irq(mpic, get_irq_regs());
         if (cascade_irq != NO_IRQ)
-                generic_handle_irq(cascade_irq, regs);
+                generic_handle_irq(cascade_irq);
         desc->chip->eoi(irq);
 }
 
diff --git a/arch/powerpc/platforms/pseries/ras.c b/arch/powerpc/platforms/pseries/ras.c
index 311ed1993fc0..b1d3d161249e 100644
--- a/arch/powerpc/platforms/pseries/ras.c
+++ b/arch/powerpc/platforms/pseries/ras.c
@@ -65,16 +65,14 @@ static int ras_check_exception_token;
 #define EPOW_SENSOR_INDEX       0
 #define RAS_VECTOR_OFFSET       0x500
 
-static irqreturn_t ras_epow_interrupt(int irq, void *dev_id,
-                                        struct pt_regs * regs);
-static irqreturn_t ras_error_interrupt(int irq, void *dev_id,
-                                        struct pt_regs * regs);
+static irqreturn_t ras_epow_interrupt(int irq, void *dev_id);
+static irqreturn_t ras_error_interrupt(int irq, void *dev_id);
 
 /* #define DEBUG */
 
 
 static void request_ras_irqs(struct device_node *np,
-                        irqreturn_t (*handler)(int, void *, struct pt_regs *),
+                        irq_handler_t handler,
                         const char *name)
 {
         int i, index, count = 0;
@@ -166,8 +164,7 @@ __initcall(init_ras_IRQ);
  * to examine the type of power failure and take appropriate action where
  * the time horizon permits something useful to be done.
  */
-static irqreturn_t
-ras_epow_interrupt(int irq, void *dev_id, struct pt_regs * regs)
+static irqreturn_t ras_epow_interrupt(int irq, void *dev_id)
 {
         int status = 0xdeadbeef;
         int state = 0;
@@ -210,8 +207,7 @@ ras_epow_interrupt(int irq, void *dev_id, struct pt_regs * regs)
  * For nonrecoverable errors, an error is logged and we stop all processing
  * as quickly as possible in order to prevent propagation of the failure.
  */
-static irqreturn_t
-ras_error_interrupt(int irq, void *dev_id, struct pt_regs * regs)
+static irqreturn_t ras_error_interrupt(int irq, void *dev_id)
 {
         struct rtas_error_log *rtas_elog;
         int status = 0xdeadbeef;
diff --git a/arch/powerpc/platforms/pseries/setup.c b/arch/powerpc/platforms/pseries/setup.c
index f82b13e531a3..ad9aec2c6fee 100644
--- a/arch/powerpc/platforms/pseries/setup.c
+++ b/arch/powerpc/platforms/pseries/setup.c
@@ -121,12 +121,11 @@ static void __init fwnmi_init(void)
                 fwnmi_active = 1;
 }
 
-void pseries_8259_cascade(unsigned int irq, struct irq_desc *desc,
-                          struct pt_regs *regs)
+void pseries_8259_cascade(unsigned int irq, struct irq_desc *desc)
 {
-        unsigned int cascade_irq = i8259_irq(regs);
+        unsigned int cascade_irq = i8259_irq(get_irq_regs());
         if (cascade_irq != NO_IRQ)
-                generic_handle_irq(cascade_irq, regs);
+                generic_handle_irq(cascade_irq);
         desc->chip->eoi(irq);
 }
 
diff --git a/arch/powerpc/platforms/pseries/xics.c b/arch/powerpc/platforms/pseries/xics.c
index 253972e5479f..f6bd2f285153 100644
--- a/arch/powerpc/platforms/pseries/xics.c
+++ b/arch/powerpc/platforms/pseries/xics.c
@@ -324,7 +324,7 @@ static unsigned int xics_get_irq_lpar(struct pt_regs *regs)
 
 #ifdef CONFIG_SMP
 
-static irqreturn_t xics_ipi_dispatch(int cpu, struct pt_regs *regs)
+static irqreturn_t xics_ipi_dispatch(int cpu)
 {
         WARN_ON(cpu_is_offline(cpu));
 
@@ -332,47 +332,47 @@ static irqreturn_t xics_ipi_dispatch(int cpu, struct pt_regs *regs)
                 if (test_and_clear_bit(PPC_MSG_CALL_FUNCTION,
                                        &xics_ipi_message[cpu].value)) {
                         mb();
-                        smp_message_recv(PPC_MSG_CALL_FUNCTION, regs);
+                        smp_message_recv(PPC_MSG_CALL_FUNCTION);
                 }
                 if (test_and_clear_bit(PPC_MSG_RESCHEDULE,
                                        &xics_ipi_message[cpu].value)) {
                         mb();
-                        smp_message_recv(PPC_MSG_RESCHEDULE, regs);
+                        smp_message_recv(PPC_MSG_RESCHEDULE);
                 }
 #if 0
                 if (test_and_clear_bit(PPC_MSG_MIGRATE_TASK,
                                        &xics_ipi_message[cpu].value)) {
                         mb();
-                        smp_message_recv(PPC_MSG_MIGRATE_TASK, regs);
+                        smp_message_recv(PPC_MSG_MIGRATE_TASK);
                 }
 #endif
 #if defined(CONFIG_DEBUGGER) || defined(CONFIG_KEXEC)
                 if (test_and_clear_bit(PPC_MSG_DEBUGGER_BREAK,
                                        &xics_ipi_message[cpu].value)) {
                         mb();
-                        smp_message_recv(PPC_MSG_DEBUGGER_BREAK, regs);
+                        smp_message_recv(PPC_MSG_DEBUGGER_BREAK);
                 }
 #endif
         }
         return IRQ_HANDLED;
 }
 
-static irqreturn_t xics_ipi_action_direct(int irq, void *dev_id, struct pt_regs *regs)
+static irqreturn_t xics_ipi_action_direct(int irq, void *dev_id)
 {
         int cpu = smp_processor_id();
 
         direct_qirr_info(cpu, 0xff);
 
-        return xics_ipi_dispatch(cpu, regs);
+        return xics_ipi_dispatch(cpu);
 }
 
-static irqreturn_t xics_ipi_action_lpar(int irq, void *dev_id, struct pt_regs *regs)
+static irqreturn_t xics_ipi_action_lpar(int irq, void *dev_id)
 {
         int cpu = smp_processor_id();
 
         lpar_qirr_info(cpu, 0xff);
 
-        return xics_ipi_dispatch(cpu, regs);
+        return xics_ipi_dispatch(cpu);
 }
 
 void xics_cause_IPI(int cpu)
diff --git a/arch/powerpc/platforms/pseries/xics.h b/arch/powerpc/platforms/pseries/xics.h
index 6ee1055b0ffb..db0ec3ba3ae2 100644
--- a/arch/powerpc/platforms/pseries/xics.h
+++ b/arch/powerpc/platforms/pseries/xics.h
@@ -31,7 +31,6 @@ struct xics_ipi_struct {
 extern struct xics_ipi_struct xics_ipi_message[NR_CPUS] __cacheline_aligned;
 
 struct irq_desc;
-extern void pseries_8259_cascade(unsigned int irq, struct irq_desc *desc,
-                                 struct pt_regs *regs);
+extern void pseries_8259_cascade(unsigned int irq, struct irq_desc *desc);
 
 #endif /* _POWERPC_KERNEL_XICS_H */
diff --git a/arch/powerpc/sysdev/mpic.c b/arch/powerpc/sysdev/mpic.c
index 3ee03a9a98fa..195215560fd7 100644
--- a/arch/powerpc/sysdev/mpic.c
+++ b/arch/powerpc/sysdev/mpic.c
@@ -489,9 +489,9 @@ static inline void mpic_eoi(struct mpic *mpic)
 }
 
 #ifdef CONFIG_SMP
-static irqreturn_t mpic_ipi_action(int irq, void *dev_id, struct pt_regs *regs)
+static irqreturn_t mpic_ipi_action(int irq, void *dev_id)
 {
-        smp_message_recv(mpic_irq_to_hw(irq) - MPIC_VEC_IPI_0, regs);
+        smp_message_recv(mpic_irq_to_hw(irq) - MPIC_VEC_IPI_0);
         return IRQ_HANDLED;
 }
 #endif /* CONFIG_SMP */
diff --git a/arch/powerpc/xmon/xmon.c b/arch/powerpc/xmon/xmon.c
index 708236f34746..5a854f36383c 100644
--- a/arch/powerpc/xmon/xmon.c
+++ b/arch/powerpc/xmon/xmon.c
@@ -21,6 +21,7 @@
 #include <linux/module.h>
 #include <linux/sysrq.h>
 #include <linux/interrupt.h>
+#include <linux/irq.h>
 
 #include <asm/ptrace.h>
 #include <asm/string.h>
@@ -2577,12 +2578,11 @@ void xmon_init(int enable)
 }
 
 #ifdef CONFIG_MAGIC_SYSRQ
-static void sysrq_handle_xmon(int key, struct pt_regs *pt_regs,
-                              struct tty_struct *tty) 
+static void sysrq_handle_xmon(int key, struct tty_struct *tty) 
 {
         /* ensure xmon is enabled */
         xmon_init(1);
-        debugger(pt_regs);
+        debugger(get_irq_regs());
 }
 
 static struct sysrq_key_op sysrq_xmon_op =