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[PATCH] x86_64: Remove useless KDB vector

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It was set as an NMI, but the NMI bit always forces an interrupt
to end up at vector 2. So it was never used. Remove.

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Andi Kleen 2006-01-11 22:45:54 +01:00 committed by Linus Torvalds
parent e080e9d66f
commit 915f34e20c
6 changed files with 3 additions and 22 deletions
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3
arch/x86_64/kernel/entry.S
View file

@ -1040,9 +1040,6 @@ ENTRY(machine_check)
CFI_ENDPROC CFI_ENDPROC
#endif #endif
ENTRY(call_debug)
zeroentry do_call_debug
ENTRY(call_softirq) ENTRY(call_softirq)
CFI_STARTPROC CFI_STARTPROC
movq %gs:pda_irqstackptr,%rax movq %gs:pda_irqstackptr,%rax

3
arch/x86_64/kernel/i8259.c
View file

@ -549,10 +549,9 @@ void __init init_IRQ(void)
int vector = FIRST_EXTERNAL_VECTOR + i; int vector = FIRST_EXTERNAL_VECTOR + i;
if (i >= NR_IRQS) if (i >= NR_IRQS)
break; break;
if (vector != IA32_SYSCALL_VECTOR && vector != KDB_VECTOR) { if (vector != IA32_SYSCALL_VECTOR)
set_intr_gate(vector, interrupt[i]); set_intr_gate(vector, interrupt[i]);
} }
}
#ifdef CONFIG_SMP #ifdef CONFIG_SMP
/* /*

5
arch/x86_64/kernel/smp.c
View file

@ -281,11 +281,6 @@ void flush_tlb_all(void)
on_each_cpu(do_flush_tlb_all, NULL, 1, 1); on_each_cpu(do_flush_tlb_all, NULL, 1, 1);
} }
void smp_kdb_stop(void)
{
send_IPI_allbutself(KDB_VECTOR);
}
/* /*
* this function sends a 'reschedule' IPI to another CPU. * this function sends a 'reschedule' IPI to another CPU.
* it goes straight through and wastes no time serializing * it goes straight through and wastes no time serializing

7
arch/x86_64/kernel/traps.c
View file

@ -910,11 +910,6 @@ asmlinkage void math_state_restore(void)
me->thread_info->status |= TS_USEDFPU; me->thread_info->status |= TS_USEDFPU;
} }
void do_call_debug(struct pt_regs *regs)
{
notify_die(DIE_CALL, "debug call", regs, 0, 255, SIGINT);
}
void __init trap_init(void) void __init trap_init(void)
{ {
set_intr_gate(0,&divide_error); set_intr_gate(0,&divide_error);
@ -944,8 +939,6 @@ void __init trap_init(void)
set_system_gate(IA32_SYSCALL_VECTOR, ia32_syscall); set_system_gate(IA32_SYSCALL_VECTOR, ia32_syscall);
#endif #endif
set_intr_gate(KDB_VECTOR, call_debug);
/* /*
* Should be a barrier for any external CPU state. * Should be a barrier for any external CPU state.
*/ */

3
include/asm-x86_64/hw_irq.h
View file

@ -51,7 +51,8 @@ struct hw_interrupt_type;
#define ERROR_APIC_VECTOR 0xfe #define ERROR_APIC_VECTOR 0xfe
#define RESCHEDULE_VECTOR 0xfd #define RESCHEDULE_VECTOR 0xfd
#define CALL_FUNCTION_VECTOR 0xfc #define CALL_FUNCTION_VECTOR 0xfc
#define KDB_VECTOR 0xfb /* reserved for KDB */ /* fb free - please don't readd KDB here because it's useless
(hint - think what a NMI bit does to a vector) */
#define THERMAL_APIC_VECTOR 0xfa #define THERMAL_APIC_VECTOR 0xfa
#define THRESHOLD_APIC_VECTOR 0xf9 #define THRESHOLD_APIC_VECTOR 0xf9
/* f8 free */ /* f8 free */

4
include/asm-x86_64/ipi.h
View file

@ -38,10 +38,6 @@ static inline unsigned int __prepare_ICR (unsigned int shortcut, int vector, uns
icr |= APIC_DM_FIXED | vector; icr |= APIC_DM_FIXED | vector;
break; break;
case NMI_VECTOR: case NMI_VECTOR:
/*
* Setup KDB IPI to be delivered as an NMI
*/
case KDB_VECTOR:
icr |= APIC_DM_NMI; icr |= APIC_DM_NMI;
break; break;
} }