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generic: sparse irqs: use irq_desc() together with dyn_array, instead of irq_desc[]

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add CONFIG_HAVE_SPARSE_IRQ to for use condensed array.
Get rid of irq_desc[] array assumptions.

Preallocate 32 irq_desc, and irq_desc() will try to get more.

( No change in functionality is expected anywhere, except the odd build
  failure where we missed a code site or where a crossing commit itroduces
  new irq_desc[] usage. )

v2: according to Eric, change get_irq_desc() to irq_desc()

Signed-off-by: Yinghai Lu <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
This commit is contained in:
Yinghai Lu 2008-08-19 20:50:05 -07:00 • committed by Ingo Molnar
commit 08678b0841
28 changed files with 404 additions and 187 deletions
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12
drivers/pcmcia/hd64465_ss.c
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@ -233,15 +233,18 @@ static struct hw_interrupt_type hd64465_ss_irq_type = {
*/
static void hs_map_irq(hs_socket_t *sp, unsigned int irq)
{
struct irq_desc *desc;
DPRINTK("hs_map_irq(sock=%d irq=%d)\n", sp->number, irq);
if (irq >= HS_NUM_MAPPED_IRQS)
return;
desc = irq_to_desc(irq);
hs_mapped_irq[irq].sock = sp;
/* insert ourselves as the irq controller */
hs_mapped_irq[irq].old_handler = irq_desc[irq].chip;
irq_desc[irq].chip = &hd64465_ss_irq_type;
hs_mapped_irq[irq].old_handler = desc->chip;
desc->chip = &hd64465_ss_irq_type;
}
@ -250,13 +253,16 @@ static void hs_map_irq(hs_socket_t *sp, unsigned int irq)
*/
static void hs_unmap_irq(hs_socket_t *sp, unsigned int irq)
{
struct irq_desc *desc;
DPRINTK("hs_unmap_irq(sock=%d irq=%d)\n", sp->number, irq);
if (irq >= HS_NUM_MAPPED_IRQS)
return;
desc = irq_to_desc(irq);
/* restore the original irq controller */
irq_desc[irq].chip = hs_mapped_irq[irq].old_handler;
desc->chip = hs_mapped_irq[irq].old_handler;
}
/*============================================================*/