generic: sparse irqs: use irq_desc() together with dyn_array, instead of irq_desc[]
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 <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/drivers/parisc/eisa.c b/drivers/parisc/eisa.c
index 771cef5..7891db5 100644
--- a/drivers/parisc/eisa.c
+++ b/drivers/parisc/eisa.c
@@ -346,10 +346,10 @@
}
/* Reserve IRQ2 */
- irq_desc[2].action = &irq2_action;
+ irq_to_desc(2)->action = &irq2_action;
for (i = 0; i < 16; i++) {
- irq_desc[i].chip = &eisa_interrupt_type;
+ irq_to_desc(i)->chip = &eisa_interrupt_type;
}
EISA_bus = 1;