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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
#endif
ENTRY(call_debug)
zeroentry do_call_debug
ENTRY(call_softirq)
CFI_STARTPROC
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;
if (i >= NR_IRQS)
break;
if (vector != IA32_SYSCALL_VECTOR && vector != KDB_VECTOR) {
if (vector != IA32_SYSCALL_VECTOR)
set_intr_gate(vector, interrupt[i]);
}
}
#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);
}
void smp_kdb_stop(void)
{
send_IPI_allbutself(KDB_VECTOR);
}
/*
* this function sends a 'reschedule' IPI to another CPU.
* it goes straight through and wastes no time serializing

7
arch/x86_64/kernel/traps.c
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@ -910,11 +910,6 @@ asmlinkage void math_state_restore(void)
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)
{
set_intr_gate(0,&divide_error);
@ -944,8 +939,6 @@ void __init trap_init(void)
set_system_gate(IA32_SYSCALL_VECTOR, ia32_syscall);
#endif
set_intr_gate(KDB_VECTOR, call_debug);
/*
* Should be a barrier for any external CPU state.
*/

3
include/asm-x86_64/hw_irq.h
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@ -51,7 +51,8 @@ struct hw_interrupt_type;
#define ERROR_APIC_VECTOR 0xfe
#define RESCHEDULE_VECTOR 0xfd
#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 THRESHOLD_APIC_VECTOR 0xf9
/* 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;
break;
case NMI_VECTOR:
/*
* Setup KDB IPI to be delivered as an NMI
*/
case KDB_VECTOR:
icr |= APIC_DM_NMI;
break;
}