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x86/entry: Remove debug IDT frobbing

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This is all unused now.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/20200529213321.245019500@infradead.org
This commit is contained in:
Peter Zijlstra
2020-05-29 23:27:37 +02:00
committed by Thomas Gleixner
parent 84b6a34915
commit f9912ada82
5 changed files with 1 additions and 108 deletions
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9
arch/x86/kernel/traps.c
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@@ -798,12 +798,6 @@ static void noinstr handle_debug(struct pt_regs *regs, unsigned long dr6,
return;
}
/*
* Let others (NMI) know that the debug stack is in use
* as we may switch to the interrupt stack.
*/
debug_stack_usage_inc();
/* It's safe to allow irq's after DR6 has been saved */
cond_local_irq_enable(regs);
@@ -831,7 +825,6 @@ static void noinstr handle_debug(struct pt_regs *regs, unsigned long dr6,
out:
cond_local_irq_disable(regs);
debug_stack_usage_dec();
instrumentation_end();
}
@@ -1077,6 +1070,4 @@ void __init trap_init(void)
cpu_init();
idt_setup_ist_traps();
idt_setup_debugidt_traps();
}