From 6bedb2ccb02dcc70ffc8eb76df71c746378190ad Mon Sep 17 00:00:00 2001 From: Oleg Nesterov Date: Thu, 7 Dec 2006 02:14:19 +0100 Subject: [PATCH] [PATCH] x86-64: don't use set_irq_regs() 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 Signed-off-by: Andi Kleen Acked-by: Ingo Molnar Cc: Andi Kleen Acked-By: David Howells Signed-off-by: Andrew Morton --- arch/i386/kernel/smp.c | 6 ------ 1 file changed, 6 deletions(-) diff --git a/arch/i386/kernel/smp.c b/arch/i386/kernel/smp.c index 31e5c6573aae..1b080ab8a49f 100644 --- a/arch/i386/kernel/smp.c +++ b/arch/i386/kernel/smp.c @@ -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); } /* -- 2.20.1