[MIPS] Rewrite spurious_interrupt from assembler to C.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

18 files changed, 40 insertions, 44 deletions

diff --git a/arch/mips/au1000/common/int-handler.S b/arch/mips/au1000/common/int-handler.S
index 1c4ca883321e..65baa8a8c522 100644
--- a/arch/mips/au1000/common/int-handler.S
+++ b/arch/mips/au1000/common/int-handler.S
@@ -64,5 +64,6 @@ NESTED(au1000_IRQ, PT_SIZE, sp)
 
 5:
         move    a0, sp
-        j       spurious_interrupt
+        jal     spurious_interrupt
+        j       ret_from_irq
 END(au1000_IRQ)
diff --git a/arch/mips/ddb5xxx/ddb5476/int-handler.S b/arch/mips/ddb5xxx/ddb5476/int-handler.S
index 12c292e189ba..0c2bdae96bb1 100644
--- a/arch/mips/ddb5xxx/ddb5476/int-handler.S
+++ b/arch/mips/ddb5xxx/ddb5476/int-handler.S
@@ -54,7 +54,8 @@
         .set    reorder
 
         /* wrong alarm or masked ... */
-        // j    spurious_interrupt
+        // jal  spurious_interrupt
+        // j    ret_from_irq
         move    a0, sp
         jal     vrc5476_irq_dispatch
         j       ret_from_irq
diff --git a/arch/mips/ddb5xxx/ddb5476/vrc5476_irq.c b/arch/mips/ddb5xxx/ddb5476/vrc5476_irq.c
index f66fe5b58636..581eabad5f82 100644
--- a/arch/mips/ddb5xxx/ddb5476/vrc5476_irq.c
+++ b/arch/mips/ddb5xxx/ddb5476/vrc5476_irq.c
@@ -80,8 +80,6 @@ vrc5476_irq_init(u32 base)
 asmlinkage void
 vrc5476_irq_dispatch(struct pt_regs *regs)
 {
-        extern void spurious_interrupt(void);
-
         u32 mask;
         int nile4_irq;
 
@@ -107,5 +105,5 @@ vrc5476_irq_dispatch(struct pt_regs *regs)
                         return;
                 }
         }
-        spurious_interrupt();
+        spurious_interrupt(regs);
 }
diff --git a/arch/mips/ddb5xxx/ddb5477/int-handler.S b/arch/mips/ddb5xxx/ddb5477/int-handler.S
index a2502a14400e..9884874dbeb5 100644
--- a/arch/mips/ddb5xxx/ddb5477/int-handler.S
+++ b/arch/mips/ddb5xxx/ddb5477/int-handler.S
@@ -44,8 +44,8 @@
         .set    reorder
 
         /* wrong alarm or masked ... */
-        j       spurious_interrupt
-        nop
+        jal     spurious_interrupt
+        j       ret_from_irq
         END(ddb5477_handle_int)
 
         .align  5
diff --git a/arch/mips/dec/int-handler.S b/arch/mips/dec/int-handler.S
index 41fa372007bf..5bafd585ac3e 100644
--- a/arch/mips/dec/int-handler.S
+++ b/arch/mips/dec/int-handler.S
@@ -282,7 +282,9 @@ fpu:
 #endif
 
 spurious:
-                j       spurious_interrupt
+                jal     spurious_interrupt
+                 nop
+                j       ret_from_irq
                  nop
                 END(decstation_handle_int)
 
diff --git a/arch/mips/galileo-boards/ev96100/int-handler.S b/arch/mips/galileo-boards/ev96100/int-handler.S
index ff4d10a38859..0edf1fec2905 100644
--- a/arch/mips/galileo-boards/ev96100/int-handler.S
+++ b/arch/mips/galileo-boards/ev96100/int-handler.S
@@ -29,5 +29,6 @@ NESTED(ev96100IRQ, PT_SIZE, sp)
         jal     ev96100_cpu_irq
         j       ret_from_irq
 
-3:      j       spurious_interrupt
+3:      jal     spurious_interrupt
+        j       ret_from_irq
         END(ev96100IRQ)
diff --git a/arch/mips/gt64120/ev64120/int-handler.S b/arch/mips/gt64120/ev64120/int-handler.S
index 752435faf2de..9dda5b449522 100644
--- a/arch/mips/gt64120/ev64120/int-handler.S
+++ b/arch/mips/gt64120/ev64120/int-handler.S
@@ -39,8 +39,9 @@
                 nop
 
     /* wrong alarm or masked ... */
-                j       spurious_interrupt
+                jal     spurious_interrupt
                 nop
+                j       ret_from_irq
                 END(galileo_handle_int)
 
 
diff --git a/arch/mips/jazz/int-handler.S b/arch/mips/jazz/int-handler.S
index dc752c67b528..e35f5fcd3f90 100644
--- a/arch/mips/jazz/int-handler.S
+++ b/arch/mips/jazz/int-handler.S
@@ -263,7 +263,8 @@ loc_call:	/*
 /*
  * "Jump extender" to reach spurious_interrupt
  */
-3:              j       spurious_interrupt
+3:              jal     spurious_interrupt
+                j       ret_from_irq
 
 /*
  * Vectors for interrupts generated by local devices
diff --git a/arch/mips/kernel/entry.S b/arch/mips/kernel/entry.S
index 83c87fe4ee4f..371571f4f280 100644
--- a/arch/mips/kernel/entry.S
+++ b/arch/mips/kernel/entry.S
@@ -119,29 +119,3 @@ syscall_exit_work:
         li      a1, 1
         jal     do_syscall_trace
         b       resume_userspace
-
-/*
- * Common spurious interrupt handler.
- */
-LEAF(spurious_interrupt)
-        /*
-         * Someone tried to fool us by sending an interrupt but we
-         * couldn't find a cause for it.
-         */
-        PTR_LA  t1, irq_err_count
-#ifdef CONFIG_SMP
-1:      ll      t0, (t1)
-        addiu   t0, 1
-        sc      t0, (t1)
-#if R10000_LLSC_WAR
-        beqzl   t0, 1b
-#else
-        beqz    t0, 1b
-#endif
-#else
-        lw      t0, (t1)
-        addiu   t0, 1
-        sw      t0, (t1)
-#endif
-        j       ret_from_irq
-        END(spurious_interrupt)
diff --git a/arch/mips/kernel/irq.c b/arch/mips/kernel/irq.c
index 3dd76b3d2967..e0efc4f2f93e 100644
--- a/arch/mips/kernel/irq.c
+++ b/arch/mips/kernel/irq.c
@@ -101,6 +101,11 @@ skip:
         return 0;
 }
 
+asmlinkage void spurious_interrupt(struct pt_regs *regs)
+{
+        atomic_inc(&irq_err_count);
+}
+
 #ifdef CONFIG_KGDB
 extern void breakpoint(void);
 extern void set_debug_traps(void);
diff --git a/arch/mips/mips-boards/generic/mipsIRQ.S b/arch/mips/mips-boards/generic/mipsIRQ.S
index ddd5c73a2971..973e10aaacd5 100644
--- a/arch/mips/mips-boards/generic/mipsIRQ.S
+++ b/arch/mips/mips-boards/generic/mipsIRQ.S
@@ -150,6 +150,8 @@
 
 
 spurious:
-        j       spurious_interrupt
+        jal     spurious_interrupt
+         nop
+        j       ret_from_irq
          nop
         END(mipsIRQ)
diff --git a/arch/mips/mips-boards/sim/sim_irq.S b/arch/mips/mips-boards/sim/sim_irq.S
index da52297a2216..d16cf3822076 100644
--- a/arch/mips/mips-boards/sim/sim_irq.S
+++ b/arch/mips/mips-boards/sim/sim_irq.S
@@ -94,6 +94,8 @@
 
 
 spurious:
-        j       spurious_interrupt
+        jal     spurious_interrupt
+         nop
+        j       ret_from_irq
          nop
         END(simIRQ)
diff --git a/arch/mips/momentum/ocelot_3/int-handler.S b/arch/mips/momentum/ocelot_3/int-handler.S
index 4522f09ed769..b1207262984a 100644
--- a/arch/mips/momentum/ocelot_3/int-handler.S
+++ b/arch/mips/momentum/ocelot_3/int-handler.S
@@ -78,8 +78,10 @@
                 .set    reorder
 
                 /* wrong alarm or masked ... */
-                j       spurious_interrupt
+                jal     spurious_interrupt
                 nop
+                j       ret_from_irq
+                 nop
                 END(ocelot3_handle_int)
 
                 .align  5
diff --git a/arch/mips/momentum/ocelot_c/int-handler.S b/arch/mips/momentum/ocelot_c/int-handler.S
index 52349d9bf1be..f77834193c3c 100644
--- a/arch/mips/momentum/ocelot_c/int-handler.S
+++ b/arch/mips/momentum/ocelot_c/int-handler.S
@@ -52,8 +52,9 @@
                 .set    reorder
 
                 /* wrong alarm or masked ... */
-                j       spurious_interrupt
+                jal     spurious_interrupt
                 nop
+                j       ret_from_irq
                 END(ocelot_handle_int)
 
                 .align  5
diff --git a/arch/mips/philips/pnx8550/common/mipsIRQ.S b/arch/mips/philips/pnx8550/common/mipsIRQ.S
index 338bffda3fab..e049a719f83d 100644
--- a/arch/mips/philips/pnx8550/common/mipsIRQ.S
+++ b/arch/mips/philips/pnx8550/common/mipsIRQ.S
@@ -46,8 +46,9 @@
 
                 /* wrong alarm or masked ... */
 
-                j       spurious_interrupt
+                jal     spurious_interrupt
                 nop
+                j       ret_from_irq
                 END(cp0_irqdispatch)
 
                 .align  5
diff --git a/arch/mips/tx4927/common/tx4927_irq_handler.S b/arch/mips/tx4927/common/tx4927_irq_handler.S
index dd3ceda9d712..0b2ea02574f2 100644
--- a/arch/mips/tx4927/common/tx4927_irq_handler.S
+++ b/arch/mips/tx4927/common/tx4927_irq_handler.S
@@ -63,8 +63,9 @@
                 .set    reorder
 
                 /* wrong alarm or masked ... */
-                j       spurious_interrupt
+                jal     spurious_interrupt
                 nop
+                j       ret_from_irq
                 END(tx4927_irq_handler)
 
                 .align  5
diff --git a/arch/mips/vr41xx/common/int-handler.S b/arch/mips/vr41xx/common/int-handler.S
index 2b6043f16d09..e8652348fef1 100644
--- a/arch/mips/vr41xx/common/int-handler.S
+++ b/arch/mips/vr41xx/common/int-handler.S
@@ -98,8 +98,10 @@
                 bnez    t1, handle_irq
                 li      a0, 1
 
-                j       spurious_interrupt
+                jal     spurious_interrupt
                 nop
+                j       ret_from_irq
+                 nop
 
 handle_int:
                 jal     irq_dispatch
diff --git a/include/asm-mips/irq.h b/include/asm-mips/irq.h
index 8a342ccb34a8..d7aecca3b95f 100644
--- a/include/asm-mips/irq.h
+++ b/include/asm-mips/irq.h
@@ -46,5 +46,6 @@ do {									\
 #endif
 
 extern void arch_init_irq(void);
+extern void spurious_interrupt(struct pt_regs *regs);
 
 #endif /* _ASM_IRQ_H */