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Subject[PATCH 03/16] x86, asmlinkage: Make all interrupt handlers asmlinkage / __visible
Date
From: Andi Kleen <ak@linux.intel.com>

These handlers are all referenced from assembler stubs, so need
to be visible.

The handlers without arguments become asmlinkage, the others __visible
to not force regparms(0) on x86-32.

I put it all into a single patch, please let me know if you want
it it split up.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
---
arch/x86/include/asm/hw_irq.h | 120 ++++++++++++++++++++----------------------
arch/x86/include/asm/irq.h | 2 +-
arch/x86/kernel/apic/apic.c | 12 ++---
arch/x86/kernel/irq.c | 8 +--
arch/x86/kernel/irq_work.c | 4 +-
arch/x86/kernel/smp.c | 12 ++---
6 files changed, 77 insertions(+), 81 deletions(-)

diff --git a/arch/x86/include/asm/hw_irq.h b/arch/x86/include/asm/hw_irq.h
index e4ac559..92b3bae 100644
--- a/arch/x86/include/asm/hw_irq.h
+++ b/arch/x86/include/asm/hw_irq.h
@@ -26,56 +26,56 @@
#include <asm/sections.h>

/* Interrupt handlers registered during init_IRQ */
-extern void apic_timer_interrupt(void);
-extern void x86_platform_ipi(void);
-extern void kvm_posted_intr_ipi(void);
-extern void error_interrupt(void);
-extern void irq_work_interrupt(void);
-
-extern void spurious_interrupt(void);
-extern void thermal_interrupt(void);
-extern void reschedule_interrupt(void);
-
-extern void invalidate_interrupt(void);
-extern void invalidate_interrupt0(void);
-extern void invalidate_interrupt1(void);
-extern void invalidate_interrupt2(void);
-extern void invalidate_interrupt3(void);
-extern void invalidate_interrupt4(void);
-extern void invalidate_interrupt5(void);
-extern void invalidate_interrupt6(void);
-extern void invalidate_interrupt7(void);
-extern void invalidate_interrupt8(void);
-extern void invalidate_interrupt9(void);
-extern void invalidate_interrupt10(void);
-extern void invalidate_interrupt11(void);
-extern void invalidate_interrupt12(void);
-extern void invalidate_interrupt13(void);
-extern void invalidate_interrupt14(void);
-extern void invalidate_interrupt15(void);
-extern void invalidate_interrupt16(void);
-extern void invalidate_interrupt17(void);
-extern void invalidate_interrupt18(void);
-extern void invalidate_interrupt19(void);
-extern void invalidate_interrupt20(void);
-extern void invalidate_interrupt21(void);
-extern void invalidate_interrupt22(void);
-extern void invalidate_interrupt23(void);
-extern void invalidate_interrupt24(void);
-extern void invalidate_interrupt25(void);
-extern void invalidate_interrupt26(void);
-extern void invalidate_interrupt27(void);
-extern void invalidate_interrupt28(void);
-extern void invalidate_interrupt29(void);
-extern void invalidate_interrupt30(void);
-extern void invalidate_interrupt31(void);
-
-extern void irq_move_cleanup_interrupt(void);
-extern void reboot_interrupt(void);
-extern void threshold_interrupt(void);
-
-extern void call_function_interrupt(void);
-extern void call_function_single_interrupt(void);
+extern asmlinkage void apic_timer_interrupt(void);
+extern asmlinkage void x86_platform_ipi(void);
+extern asmlinkage void kvm_posted_intr_ipi(void);
+extern asmlinkage void error_interrupt(void);
+extern asmlinkage void irq_work_interrupt(void);
+
+extern asmlinkage void spurious_interrupt(void);
+extern asmlinkage void thermal_interrupt(void);
+extern asmlinkage void reschedule_interrupt(void);
+
+extern asmlinkage void invalidate_interrupt(void);
+extern asmlinkage void invalidate_interrupt0(void);
+extern asmlinkage void invalidate_interrupt1(void);
+extern asmlinkage void invalidate_interrupt2(void);
+extern asmlinkage void invalidate_interrupt3(void);
+extern asmlinkage void invalidate_interrupt4(void);
+extern asmlinkage void invalidate_interrupt5(void);
+extern asmlinkage void invalidate_interrupt6(void);
+extern asmlinkage void invalidate_interrupt7(void);
+extern asmlinkage void invalidate_interrupt8(void);
+extern asmlinkage void invalidate_interrupt9(void);
+extern asmlinkage void invalidate_interrupt10(void);
+extern asmlinkage void invalidate_interrupt11(void);
+extern asmlinkage void invalidate_interrupt12(void);
+extern asmlinkage void invalidate_interrupt13(void);
+extern asmlinkage void invalidate_interrupt14(void);
+extern asmlinkage void invalidate_interrupt15(void);
+extern asmlinkage void invalidate_interrupt16(void);
+extern asmlinkage void invalidate_interrupt17(void);
+extern asmlinkage void invalidate_interrupt18(void);
+extern asmlinkage void invalidate_interrupt19(void);
+extern asmlinkage void invalidate_interrupt20(void);
+extern asmlinkage void invalidate_interrupt21(void);
+extern asmlinkage void invalidate_interrupt22(void);
+extern asmlinkage void invalidate_interrupt23(void);
+extern asmlinkage void invalidate_interrupt24(void);
+extern asmlinkage void invalidate_interrupt25(void);
+extern asmlinkage void invalidate_interrupt26(void);
+extern asmlinkage void invalidate_interrupt27(void);
+extern asmlinkage void invalidate_interrupt28(void);
+extern asmlinkage void invalidate_interrupt29(void);
+extern asmlinkage void invalidate_interrupt30(void);
+extern asmlinkage void invalidate_interrupt31(void);
+
+extern asmlinkage void irq_move_cleanup_interrupt(void);
+extern asmlinkage void reboot_interrupt(void);
+extern asmlinkage void threshold_interrupt(void);
+
+extern asmlinkage void call_function_interrupt(void);
+extern asmlinkage void call_function_single_interrupt(void);

#ifdef CONFIG_TRACING
/* Interrupt handlers registered during init_IRQ */
@@ -172,22 +172,18 @@ extern atomic_t irq_mis_count;
extern void eisa_set_level_irq(unsigned int irq);

/* SMP */
-extern void smp_apic_timer_interrupt(struct pt_regs *);
-extern void smp_spurious_interrupt(struct pt_regs *);
-extern void smp_x86_platform_ipi(struct pt_regs *);
-extern void smp_error_interrupt(struct pt_regs *);
+extern __visible void smp_apic_timer_interrupt(struct pt_regs *);
+extern __visible void smp_spurious_interrupt(struct pt_regs *);
+extern __visible void smp_x86_platform_ipi(struct pt_regs *);
+extern __visible void smp_error_interrupt(struct pt_regs *);
#ifdef CONFIG_X86_IO_APIC
extern asmlinkage void smp_irq_move_cleanup_interrupt(void);
#endif
#ifdef CONFIG_SMP
-extern void smp_reschedule_interrupt(struct pt_regs *);
-extern void smp_call_function_interrupt(struct pt_regs *);
-extern void smp_call_function_single_interrupt(struct pt_regs *);
-#ifdef CONFIG_X86_32
-extern void smp_invalidate_interrupt(struct pt_regs *);
-#else
-extern asmlinkage void smp_invalidate_interrupt(struct pt_regs *);
-#endif
+extern __visible void smp_reschedule_interrupt(struct pt_regs *);
+extern __visible void smp_call_function_interrupt(struct pt_regs *);
+extern __visible void smp_call_function_single_interrupt(struct pt_regs *);
+extern __visible void smp_invalidate_interrupt(struct pt_regs *);
#endif

extern void (*__initconst interrupt[NR_VECTORS-FIRST_EXTERNAL_VECTOR])(void);
diff --git a/arch/x86/include/asm/irq.h b/arch/x86/include/asm/irq.h
index 57873be..0ea10f27 100644
--- a/arch/x86/include/asm/irq.h
+++ b/arch/x86/include/asm/irq.h
@@ -33,7 +33,7 @@ extern void (*x86_platform_ipi_callback)(void);
extern void native_init_IRQ(void);
extern bool handle_irq(unsigned irq, struct pt_regs *regs);

-extern unsigned int do_IRQ(struct pt_regs *regs);
+extern __visible unsigned int do_IRQ(struct pt_regs *regs);

/* Interrupt vector management */
extern DECLARE_BITMAP(used_vectors, NR_VECTORS);
diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c
index eca89c5..a7eb82d 100644
--- a/arch/x86/kernel/apic/apic.c
+++ b/arch/x86/kernel/apic/apic.c
@@ -913,7 +913,7 @@ static void local_apic_timer_interrupt(void)
* [ 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 __irq_entry smp_apic_timer_interrupt(struct pt_regs *regs)
+__visible void __irq_entry smp_apic_timer_interrupt(struct pt_regs *regs)
{
struct pt_regs *old_regs = set_irq_regs(regs);

@@ -932,7 +932,7 @@ void __irq_entry smp_apic_timer_interrupt(struct pt_regs *regs)
set_irq_regs(old_regs);
}

-void __irq_entry smp_trace_apic_timer_interrupt(struct pt_regs *regs)
+__visible void __irq_entry smp_trace_apic_timer_interrupt(struct pt_regs *regs)
{
struct pt_regs *old_regs = set_irq_regs(regs);

@@ -1946,14 +1946,14 @@ static inline void __smp_spurious_interrupt(void)
"should never happen.\n", smp_processor_id());
}

-void smp_spurious_interrupt(struct pt_regs *regs)
+__visible void smp_spurious_interrupt(struct pt_regs *regs)
{
entering_irq();
__smp_spurious_interrupt();
exiting_irq();
}

-void smp_trace_spurious_interrupt(struct pt_regs *regs)
+__visible void smp_trace_spurious_interrupt(struct pt_regs *regs)
{
entering_irq();
trace_spurious_apic_entry(SPURIOUS_APIC_VECTOR);
@@ -2002,14 +2002,14 @@ static inline void __smp_error_interrupt(struct pt_regs *regs)

}

-void smp_error_interrupt(struct pt_regs *regs)
+__visible void smp_error_interrupt(struct pt_regs *regs)
{
entering_irq();
__smp_error_interrupt(regs);
exiting_irq();
}

-void smp_trace_error_interrupt(struct pt_regs *regs)
+__visible void smp_trace_error_interrupt(struct pt_regs *regs)
{
entering_irq();
trace_error_apic_entry(ERROR_APIC_VECTOR);
diff --git a/arch/x86/kernel/irq.c b/arch/x86/kernel/irq.c
index 3a8185c..22d0687 100644
--- a/arch/x86/kernel/irq.c
+++ b/arch/x86/kernel/irq.c
@@ -177,7 +177,7 @@ u64 arch_irq_stat(void)
* SMP cross-CPU interrupts have their own specific
* handlers).
*/
-unsigned int __irq_entry do_IRQ(struct pt_regs *regs)
+__visible unsigned int __irq_entry do_IRQ(struct pt_regs *regs)
{
struct pt_regs *old_regs = set_irq_regs(regs);

@@ -215,7 +215,7 @@ void __smp_x86_platform_ipi(void)
x86_platform_ipi_callback();
}

-void smp_x86_platform_ipi(struct pt_regs *regs)
+__visible void smp_x86_platform_ipi(struct pt_regs *regs)
{
struct pt_regs *old_regs = set_irq_regs(regs);

@@ -229,7 +229,7 @@ void smp_x86_platform_ipi(struct pt_regs *regs)
/*
* Handler for POSTED_INTERRUPT_VECTOR.
*/
-void smp_kvm_posted_intr_ipi(struct pt_regs *regs)
+__visible void smp_kvm_posted_intr_ipi(struct pt_regs *regs)
{
struct pt_regs *old_regs = set_irq_regs(regs);

@@ -247,7 +247,7 @@ void smp_kvm_posted_intr_ipi(struct pt_regs *regs)
}
#endif

-void smp_trace_x86_platform_ipi(struct pt_regs *regs)
+__visible void smp_trace_x86_platform_ipi(struct pt_regs *regs)
{
struct pt_regs *old_regs = set_irq_regs(regs);

diff --git a/arch/x86/kernel/irq_work.c b/arch/x86/kernel/irq_work.c
index 636a55e..1de84e3 100644
--- a/arch/x86/kernel/irq_work.c
+++ b/arch/x86/kernel/irq_work.c
@@ -22,14 +22,14 @@ static inline void __smp_irq_work_interrupt(void)
irq_work_run();
}

-void smp_irq_work_interrupt(struct pt_regs *regs)
+__visible void smp_irq_work_interrupt(struct pt_regs *regs)
{
irq_work_entering_irq();
__smp_irq_work_interrupt();
exiting_irq();
}

-void smp_trace_irq_work_interrupt(struct pt_regs *regs)
+__visible void smp_trace_irq_work_interrupt(struct pt_regs *regs)
{
irq_work_entering_irq();
trace_irq_work_entry(IRQ_WORK_VECTOR);
diff --git a/arch/x86/kernel/smp.c b/arch/x86/kernel/smp.c
index cdaa347..7c3a5a6 100644
--- a/arch/x86/kernel/smp.c
+++ b/arch/x86/kernel/smp.c
@@ -256,7 +256,7 @@ static inline void __smp_reschedule_interrupt(void)
scheduler_ipi();
}

-void smp_reschedule_interrupt(struct pt_regs *regs)
+__visible void smp_reschedule_interrupt(struct pt_regs *regs)
{
ack_APIC_irq();
__smp_reschedule_interrupt();
@@ -271,7 +271,7 @@ static inline void smp_entering_irq(void)
irq_enter();
}

-void smp_trace_reschedule_interrupt(struct pt_regs *regs)
+__visible void smp_trace_reschedule_interrupt(struct pt_regs *regs)
{
/*
* Need to call irq_enter() before calling the trace point.
@@ -295,14 +295,14 @@ static inline void __smp_call_function_interrupt(void)
inc_irq_stat(irq_call_count);
}

-void smp_call_function_interrupt(struct pt_regs *regs)
+__visible void smp_call_function_interrupt(struct pt_regs *regs)
{
smp_entering_irq();
__smp_call_function_interrupt();
exiting_irq();
}

-void smp_trace_call_function_interrupt(struct pt_regs *regs)
+__visible void smp_trace_call_function_interrupt(struct pt_regs *regs)
{
smp_entering_irq();
trace_call_function_entry(CALL_FUNCTION_VECTOR);
@@ -317,14 +317,14 @@ static inline void __smp_call_function_single_interrupt(void)
inc_irq_stat(irq_call_count);
}

-void smp_call_function_single_interrupt(struct pt_regs *regs)
+__visible void smp_call_function_single_interrupt(struct pt_regs *regs)
{
smp_entering_irq();
__smp_call_function_single_interrupt();
exiting_irq();
}

-void smp_trace_call_function_single_interrupt(struct pt_regs *regs)
+__visible void smp_trace_call_function_single_interrupt(struct pt_regs *regs)
{
smp_entering_irq();
trace_call_function_single_entry(CALL_FUNCTION_SINGLE_VECTOR);
--
1.8.3.1


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