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[MIPS] IRQ cleanups

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This is a big irq cleanup patch.

* Use set_irq_chip() to register irq_chip.
* Initialize .mask, .unmask, .mask_ack field.  Functions for these
  method are already exist in most case.
* Do not initialize .startup, .shutdown, .enable, .disable fields if
  default routines provided by irq_chip_set_defaults() were suitable.
* Remove redundant irq_desc initializations.
* Remove unnecessary local_irq_save/local_irq_restore, spin_lock.

With this cleanup, it would be easy to switch to slightly lightwait
irq flow handlers (handle_level_irq(), etc.) instead of __do_IRQ().

Though whole this patch is quite large, changes in each irq_chip are
not quite simple.  Please review and test on your platform.  Thanks.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Atsushi Nemoto
2006-11-02 02:08:36 +09:00
committed by Ralf Baechle
parent c87b6ebaea
commit 1603b5aca4
37 changed files with 290 additions and 1655 deletions
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13
arch/mips/kernel/irq.c
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@@ -172,19 +172,6 @@ __setup("nokgdb", nokgdb);
void __init init_IRQ(void)
{
int i;
for (i = 0; i < NR_IRQS; i++) {
irq_desc[i].status = IRQ_DISABLED;
irq_desc[i].action = NULL;
irq_desc[i].depth = 1;
irq_desc[i].chip = &no_irq_chip;
spin_lock_init(&irq_desc[i].lock);
#ifdef CONFIG_MIPS_MT_SMTC
irq_hwmask[i] = 0;
#endif /* CONFIG_MIPS_MT_SMTC */
}
arch_init_irq();
#ifdef CONFIG_KGDB