10 files changed, 46 insertions, 48 deletions

diff --git a/arch/mips/kernel/asm-offsets.c b/arch/mips/kernel/asm-offsets.c
index ec28077d5ee2..e9ce5b3721af 100644
--- a/arch/mips/kernel/asm-offsets.c
+++ b/arch/mips/kernel/asm-offsets.c
@@ -93,11 +93,12 @@ void output_thread_info_defines(void)
         offset("#define TI_TASK            ", struct thread_info, task);
         offset("#define TI_EXEC_DOMAIN     ", struct thread_info, exec_domain);
         offset("#define TI_FLAGS           ", struct thread_info, flags);
+        offset("#define TI_TP_VALUE        ", struct thread_info, tp_value);
         offset("#define TI_CPU             ", struct thread_info, cpu);
         offset("#define TI_PRE_COUNT       ", struct thread_info, preempt_count);
         offset("#define TI_ADDR_LIMIT      ", struct thread_info, addr_limit);
         offset("#define TI_RESTART_BLOCK   ", struct thread_info, restart_block);
-        offset("#define TI_TP_VALUE        ", struct thread_info, tp_value);
+        offset("#define TI_REGS            ", struct thread_info, regs);
         constant("#define _THREAD_SIZE_ORDER ", THREAD_SIZE_ORDER);
         constant("#define _THREAD_SIZE       ", THREAD_SIZE);
         constant("#define _THREAD_MASK       ", THREAD_MASK);
diff --git a/arch/mips/kernel/entry.S b/arch/mips/kernel/entry.S
index 766655f35250..e93e43e1f42d 100644
--- a/arch/mips/kernel/entry.S
+++ b/arch/mips/kernel/entry.S
@@ -79,7 +79,6 @@ FEXPORT(syscall_exit)
 FEXPORT(restore_all)                    # restore full frame
 #ifdef CONFIG_MIPS_MT_SMTC
 /* Detect and execute deferred IPI "interrupts" */
-        move    a0,sp
         jal     deferred_smtc_ipi
 /* Re-arm any temporarily masked interrupts not explicitly "acked" */
         mfc0    v0, CP0_TCSTATUS
diff --git a/arch/mips/kernel/genex.S b/arch/mips/kernel/genex.S
index af6ef2fd8300..50ed77297728 100644
--- a/arch/mips/kernel/genex.S
+++ b/arch/mips/kernel/genex.S
@@ -131,9 +131,11 @@ NESTED(handle_int, PT_SIZE, sp)
         CLI
         TRACE_IRQS_OFF
 
-        PTR_LA  ra, ret_from_irq
-        move    a0, sp
-        j       plat_irq_dispatch
+        LONG_L  s0, TI_REGS($28)
+        LONG_S  sp, TI_REGS($28)
+        jal     plat_irq_dispatch
+        LONG_S  s0, TI_REGS($28)
+        j       ret_from_irq
         END(handle_int)
 
         __INIT
@@ -219,9 +221,12 @@ NESTED(except_vec_vi_handler, 0, sp)
 #endif /* CONFIG_MIPS_MT_SMTC */
         CLI
         TRACE_IRQS_OFF
-        move    a0, sp
+
+        LONG_L  s0, TI_REGS($28)
+        LONG_S  sp, TI_REGS($28)
+        jalr    v0
+        LONG_S  s0, TI_REGS($28)
         PTR_LA  ra, ret_from_irq
-        jr      v0
         END(except_vec_vi_handler)
 
 /*
diff --git a/arch/mips/kernel/irq-msc01.c b/arch/mips/kernel/irq-msc01.c
index 63dfeb41796b..71e8e45f3687 100644
--- a/arch/mips/kernel/irq-msc01.c
+++ b/arch/mips/kernel/irq-msc01.c
@@ -115,14 +115,14 @@ static void end_msc_irq(unsigned int irq)
 /*
  * Interrupt handler for interrupts coming from SOC-it.
  */
-void ll_msc_irq(struct pt_regs *regs)
+void ll_msc_irq(void)
 {
         unsigned int irq;
 
         /* read the interrupt vector register */
         MSCIC_READ(MSC01_IC_VEC, irq);
         if (irq < 64)
-                do_IRQ(irq + irq_base, regs);
+                do_IRQ(irq + irq_base);
         else {
                 /* Ignore spurious interrupt */
         }
diff --git a/arch/mips/kernel/irq-mv6434x.c b/arch/mips/kernel/irq-mv6434x.c
index b117e64da64d..39c94fd8d8ba 100644
--- a/arch/mips/kernel/irq-mv6434x.c
+++ b/arch/mips/kernel/irq-mv6434x.c
@@ -113,7 +113,7 @@ static void end_mv64340_irq(unsigned int irq)
  * Interrupt handler for interrupts coming from the Marvell chip.
  * It could be built in ethernet ports etc...
  */
-void ll_mv64340_irq(struct pt_regs *regs)
+void ll_mv64340_irq(void)
 {
         unsigned int irq_src_low, irq_src_high;
         unsigned int irq_mask_low, irq_mask_high;
@@ -129,9 +129,9 @@ void ll_mv64340_irq(struct pt_regs *regs)
         irq_src_high &= irq_mask_high;
 
         if (irq_src_low)
-                do_IRQ(ls1bit32(irq_src_low) + irq_base, regs);
+                do_IRQ(ls1bit32(irq_src_low) + irq_base);
         else
-                do_IRQ(ls1bit32(irq_src_high) + irq_base + 32, regs);
+                do_IRQ(ls1bit32(irq_src_high) + irq_base + 32);
 }
 
 #define shutdown_mv64340_irq    disable_mv64340_irq
diff --git a/arch/mips/kernel/irq.c b/arch/mips/kernel/irq.c
index a00b0e7ab9b1..dd24434392b6 100644
--- a/arch/mips/kernel/irq.c
+++ b/arch/mips/kernel/irq.c
@@ -53,9 +53,8 @@ unsigned long irq_hwmask[NR_IRQS];
  * SMP cross-CPU interrupts have their own specific
  * handlers).
  */
-asmlinkage unsigned int do_IRQ(unsigned int irq, struct pt_regs *regs)
+asmlinkage unsigned int do_IRQ(unsigned int irq)
 {
-        struct pt_regs *old_regs = set_irq_regs(regs);
         irq_enter();
 
         __DO_IRQ_SMTC_HOOK();
@@ -63,7 +62,6 @@ asmlinkage unsigned int do_IRQ(unsigned int irq, struct pt_regs *regs)
 
         irq_exit();
 
-        set_irq_regs(old_regs);
         return 1;
 }
 
@@ -112,7 +110,7 @@ skip:
         return 0;
 }
 
-asmlinkage void spurious_interrupt(struct pt_regs *regs)
+asmlinkage void spurious_interrupt(void)
 {
         atomic_inc(&irq_err_count);
 }
diff --git a/arch/mips/kernel/rtlx.c b/arch/mips/kernel/rtlx.c
index cdab1b2cd134..8c8c8324f775 100644
--- a/arch/mips/kernel/rtlx.c
+++ b/arch/mips/kernel/rtlx.c
@@ -61,16 +61,16 @@ static int sp_stopping = 0;
 
 extern void *vpe_get_shared(int index);
 
-static void rtlx_dispatch(struct pt_regs *regs)
+static void rtlx_dispatch(void)
 {
-        do_IRQ(MIPSCPU_INT_BASE + MIPS_CPU_RTLX_IRQ, regs);
+        do_IRQ(MIPSCPU_INT_BASE + MIPS_CPU_RTLX_IRQ);
 }
 
 
 /* Interrupt handler may be called before rtlx_init has otherwise had
    a chance to run.
 */
-static irqreturn_t rtlx_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+static irqreturn_t rtlx_interrupt(int irq, void *dev_id)
 {
         int i;
 
diff --git a/arch/mips/kernel/smp-mt.c b/arch/mips/kernel/smp-mt.c
index 766253c44f3f..3b5f3b632622 100644
--- a/arch/mips/kernel/smp-mt.c
+++ b/arch/mips/kernel/smp-mt.c
@@ -106,22 +106,22 @@ void __init sanitize_tlb_entries(void)
         clear_c0_mvpcontrol(MVPCONTROL_VPC);
 }
 
-static void ipi_resched_dispatch (struct pt_regs *regs)
+static void ipi_resched_dispatch(void)
 {
-        do_IRQ(MIPSCPU_INT_BASE + MIPS_CPU_IPI_RESCHED_IRQ, regs);
+        do_IRQ(MIPSCPU_INT_BASE + MIPS_CPU_IPI_RESCHED_IRQ);
 }
 
-static void ipi_call_dispatch (struct pt_regs *regs)
+static void ipi_call_dispatch(void)
 {
-        do_IRQ(MIPSCPU_INT_BASE + MIPS_CPU_IPI_CALL_IRQ, regs);
+        do_IRQ(MIPSCPU_INT_BASE + MIPS_CPU_IPI_CALL_IRQ);
 }
 
-irqreturn_t ipi_resched_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+static irqreturn_t ipi_resched_interrupt(int irq, void *dev_id)
 {
         return IRQ_HANDLED;
 }
 
-irqreturn_t ipi_call_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+static irqreturn_t ipi_call_interrupt(int irq, void *dev_id)
 {
         smp_call_function_interrupt();
 
@@ -250,8 +250,8 @@ void __init plat_prepare_cpus(unsigned int max_cpus)
 {
         /* set up ipi interrupts */
         if (cpu_has_vint) {
-                set_vi_handler (MIPS_CPU_IPI_RESCHED_IRQ, ipi_resched_dispatch);
-                set_vi_handler (MIPS_CPU_IPI_CALL_IRQ, ipi_call_dispatch);
+                set_vi_handler(MIPS_CPU_IPI_RESCHED_IRQ, ipi_resched_dispatch);
+                set_vi_handler(MIPS_CPU_IPI_CALL_IRQ, ipi_call_dispatch);
         }
 
         cpu_ipi_resched_irq = MIPSCPU_INT_BASE + MIPS_CPU_IPI_RESCHED_IRQ;
diff --git a/arch/mips/kernel/smtc.c b/arch/mips/kernel/smtc.c
index 604bcc5cb7c8..cc1f7474f7d7 100644
--- a/arch/mips/kernel/smtc.c
+++ b/arch/mips/kernel/smtc.c
@@ -82,7 +82,7 @@ struct smtc_ipi_q freeIPIq;
 
 /* Forward declarations */
 
-void ipi_decode(struct pt_regs *, struct smtc_ipi *);
+void ipi_decode(struct smtc_ipi *);
 void post_direct_ipi(int cpu, struct smtc_ipi *pipi);
 void setup_cross_vpe_interrupts(void);
 void init_smtc_stats(void);
@@ -820,19 +820,19 @@ void post_direct_ipi(int cpu, struct smtc_ipi *pipi)
         write_tc_c0_tcrestart(__smtc_ipi_vector);
 }
 
-void ipi_resched_interrupt(struct pt_regs *regs)
+static void ipi_resched_interrupt(void)
 {
         /* Return from interrupt should be enough to cause scheduler check */
 }
 
 
-void ipi_call_interrupt(struct pt_regs *regs)
+static void ipi_call_interrupt(void)
 {
         /* Invoke generic function invocation code in smp.c */
         smp_call_function_interrupt();
 }
 
-void ipi_decode(struct pt_regs *regs, struct smtc_ipi *pipi)
+void ipi_decode(struct smtc_ipi *pipi)
 {
         void *arg_copy = pipi->arg;
         int type_copy = pipi->type;
@@ -846,15 +846,15 @@ void ipi_decode(struct pt_regs *regs, struct smtc_ipi *pipi)
 #ifdef SMTC_IDLE_HOOK_DEBUG
                 clock_hang_reported[dest_copy] = 0;
 #endif /* SMTC_IDLE_HOOK_DEBUG */
-                local_timer_interrupt(0, NULL, regs);
+                local_timer_interrupt(0, NULL);
                 break;
         case LINUX_SMP_IPI:
                 switch ((int)arg_copy) {
                 case SMP_RESCHEDULE_YOURSELF:
-                        ipi_resched_interrupt(regs);
+                        ipi_resched_interrupt();
                         break;
                 case SMP_CALL_FUNCTION:
-                        ipi_call_interrupt(regs);
+                        ipi_call_interrupt();
                         break;
                 default:
                         printk("Impossible SMTC IPI Argument 0x%x\n",
@@ -868,7 +868,7 @@ void ipi_decode(struct pt_regs *regs, struct smtc_ipi *pipi)
         }
 }
 
-void deferred_smtc_ipi(struct pt_regs *regs)
+void deferred_smtc_ipi(void)
 {
         struct smtc_ipi *pipi;
         unsigned long flags;
@@ -883,7 +883,7 @@ void deferred_smtc_ipi(struct pt_regs *regs)
                 while((pipi = smtc_ipi_dq(&IPIQ[q])) != NULL) {
                         /* ipi_decode() should be called with interrupts off */
                         local_irq_save(flags);
-                        ipi_decode(regs, pipi);
+                        ipi_decode(pipi);
                         local_irq_restore(flags);
                 }
         }
@@ -917,7 +917,7 @@ void smtc_timer_broadcast(int vpe)
 
 static int cpu_ipi_irq = MIPSCPU_INT_BASE + MIPS_CPU_IPI_IRQ;
 
-static irqreturn_t ipi_interrupt(int irq, void *dev_idm, struct pt_regs *regs)
+static irqreturn_t ipi_interrupt(int irq, void *dev_idm)
 {
         int my_vpe = cpu_data[smp_processor_id()].vpe_id;
         int my_tc = cpu_data[smp_processor_id()].tc_id;
@@ -978,7 +978,7 @@ static irqreturn_t ipi_interrupt(int irq, void *dev_idm, struct pt_regs *regs)
                                  * with interrupts off
                                  */
                                 local_irq_save(flags);
-                                ipi_decode(regs, pipi);
+                                ipi_decode(pipi);
                                 local_irq_restore(flags);
                         }
                 }
@@ -987,9 +987,9 @@ static irqreturn_t ipi_interrupt(int irq, void *dev_idm, struct pt_regs *regs)
         return IRQ_HANDLED;
 }
 
-static void ipi_irq_dispatch(struct pt_regs *regs)
+static void ipi_irq_dispatch(void)
 {
-        do_IRQ(cpu_ipi_irq, regs);
+        do_IRQ(cpu_ipi_irq);
 }
 
 static struct irqaction irq_ipi;
diff --git a/arch/mips/kernel/time.c b/arch/mips/kernel/time.c
index d349eb9e4ffb..debe86c2f691 100644
--- a/arch/mips/kernel/time.c
+++ b/arch/mips/kernel/time.c
@@ -324,8 +324,7 @@ static long last_rtc_update;
  */
 void local_timer_interrupt(int irq, void *dev_id)
 {
-        if (current->pid)
-                profile_tick(CPU_PROFILING);
+        profile_tick(CPU_PROFILING);
         update_process_times(user_mode(get_irq_regs()));
 }
 
@@ -434,9 +433,8 @@ int (*perf_irq)(void) = null_perf_irq;
 EXPORT_SYMBOL(null_perf_irq);
 EXPORT_SYMBOL(perf_irq);
 
-asmlinkage void ll_timer_interrupt(int irq, struct pt_regs *regs)
+asmlinkage void ll_timer_interrupt(int irq)
 {
-        struct pt_regs *old_regs = set_irq_regs(regs);
         int r2 = cpu_has_mips_r2;
 
         irq_enter();
@@ -458,12 +456,10 @@ asmlinkage void ll_timer_interrupt(int irq, struct pt_regs *regs)
 
 out:
         irq_exit();
-        set_irq_regs(old_regs);
 }
 
-asmlinkage void ll_local_timer_interrupt(int irq, struct pt_regs *regs)
+asmlinkage void ll_local_timer_interrupt(int irq)
 {
-        struct pt_regs *old_regs = set_irq_regs(regs);
         irq_enter();
         if (smp_processor_id() != 0)
                 kstat_this_cpu.irqs[irq]++;
@@ -472,7 +468,6 @@ asmlinkage void ll_local_timer_interrupt(int irq, struct pt_regs *regs)
         local_timer_interrupt(irq, NULL);
 
         irq_exit();
-        set_irq_regs(old_regs);
 }
 
 /*