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authorAndi Kleen <ak@suse.de>2006-01-11 22:45:54 +0100
committerLinus Torvalds <torvalds@g5.osdl.org>2006-01-11 19:05:00 -0800
commit915f34e20c20ee383832bce0a4bc962d0c86be8d (patch)
tree2e1914cc129361d15e0ad8d888913a0623aef80b
parente080e9d66fd276ed34bc2834eedc134189b87fc9 (diff)
[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: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--arch/x86_64/kernel/entry.S3
-rw-r--r--arch/x86_64/kernel/i8259.c3
-rw-r--r--arch/x86_64/kernel/smp.c5
-rw-r--r--arch/x86_64/kernel/traps.c7
-rw-r--r--include/asm-x86_64/hw_irq.h3
-rw-r--r--include/asm-x86_64/ipi.h4
6 files changed, 3 insertions, 22 deletions
diff --git a/arch/x86_64/kernel/entry.S b/arch/x86_64/kernel/entry.S
index 300555bc56b..632fc0f59fc 100644
--- a/arch/x86_64/kernel/entry.S
+++ b/arch/x86_64/kernel/entry.S
@@ -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
diff --git a/arch/x86_64/kernel/i8259.c b/arch/x86_64/kernel/i8259.c
index 6e5101ad3d1..b61965f0fb3 100644
--- a/arch/x86_64/kernel/i8259.c
+++ b/arch/x86_64/kernel/i8259.c
@@ -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
/*
diff --git a/arch/x86_64/kernel/smp.c b/arch/x86_64/kernel/smp.c
index 6a666d248c1..19ef012b1f1 100644
--- a/arch/x86_64/kernel/smp.c
+++ b/arch/x86_64/kernel/smp.c
@@ -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
diff --git a/arch/x86_64/kernel/traps.c b/arch/x86_64/kernel/traps.c
index 0827b141c05..5dee23ba074 100644
--- a/arch/x86_64/kernel/traps.c
+++ b/arch/x86_64/kernel/traps.c
@@ -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.
*/
diff --git a/include/asm-x86_64/hw_irq.h b/include/asm-x86_64/hw_irq.h
index b248930767e..0df1715dee7 100644
--- a/include/asm-x86_64/hw_irq.h
+++ b/include/asm-x86_64/hw_irq.h
@@ -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 */
diff --git a/include/asm-x86_64/ipi.h b/include/asm-x86_64/ipi.h
index 022e9d340ad..2a5c162b7d9 100644
--- a/include/asm-x86_64/ipi.h
+++ b/include/asm-x86_64/ipi.h
@@ -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;
}