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[PATCH] x86-64: don't use set_irq_regs()

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We don't need to setup _irq_regs in smp_xxx_interrupt (except apic timer).
These handlers run with irqs disabled and do not call functions which need
"struct pt_regs".

Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Signed-off-by: Andi Kleen <ak@suse.de>
Acked-by: Ingo Molnar <mingo@elte.hu>
Cc: Andi Kleen <ak@suse.de>
Acked-By: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
This commit is contained in:
Oleg Nesterov 2006-12-07 02:14:19 +01:00 committed by Andi Kleen
parent ad892f5e0d
commit 6bedb2ccb0
1 changed files with 0 additions and 6 deletions
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6
arch/i386/kernel/smp.c
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@ -321,7 +321,6 @@ static inline void leave_mm (unsigned long cpu)
fastcall void smp_invalidate_interrupt(struct pt_regs *regs)
{
struct pt_regs *old_regs = set_irq_regs(regs);
unsigned long cpu;
cpu = get_cpu();
@ -352,7 +351,6 @@ fastcall void smp_invalidate_interrupt(struct pt_regs *regs)
smp_mb__after_clear_bit();
out:
put_cpu_no_resched();
set_irq_regs(old_regs);
}
static void flush_tlb_others(cpumask_t cpumask, struct mm_struct *mm,
@ -607,14 +605,11 @@ void smp_send_stop(void)
*/
fastcall void smp_reschedule_interrupt(struct pt_regs *regs)
{
struct pt_regs *old_regs = set_irq_regs(regs);
ack_APIC_irq();
set_irq_regs(old_regs);
}
fastcall void smp_call_function_interrupt(struct pt_regs *regs)
{
struct pt_regs *old_regs = set_irq_regs(regs);
void (*func) (void *info) = call_data->func;
void *info = call_data->info;
int wait = call_data->wait;
@ -637,7 +632,6 @@ fastcall void smp_call_function_interrupt(struct pt_regs *regs)
mb();
atomic_inc(&call_data->finished);
}
set_irq_regs(old_regs);
}
/*