Commit 915f34e2 authored by Andi Kleen's avatar Andi Kleen Committed by Linus Torvalds
Browse files

[PATCH] x86_64: Remove useless KDB vector



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: default avatarAndi Kleen <ak@suse.de>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent e080e9d6
......@@ -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
......
......@@ -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
/*
......
......@@ -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
......
......@@ -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.
*/
......
......@@ -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 */
......
......@@ -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;
}
......
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