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cpumask: make irq_set_affinity() take a const struct cpumask

Bladeren bron 
Impact: change existing irq_chip API

Not much point with gentle transition here: the struct irq_chip's
setaffinity method signature needs to change.

Fortunately, not widely used code, but hits a few architectures.

Note: In irq_select_affinity() I save a temporary in by mangling
irq_desc[irq].affinity directly.  Ingo, does this break anything?

(Folded in fix from KOSAKI Motohiro)

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Mike Travis <travis@sgi.com>
Reviewed-by: Grant Grundler <grundler@parisc-linux.org>
Acked-by: Ingo Molnar <mingo@redhat.com>
Cc: ralf@linux-mips.org
Cc: grundler@parisc-linux.org
Cc: jeremy@xensource.com
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
This commit is contained in:
Rusty Russell
2008-12-13 21:20:26 +10:30
bovenliggende 29c0177e6a
commit 0de26520c7
42 gewijzigde bestanden met toevoegingen van 172 en 162 verwijderingen
Download Patch-bestand Download Diff-bestand Expand all files Collapse all files

22
kernel/irq/manage.c
Bestand weergeven

@@ -79,7 +79,7 @@ int irq_can_set_affinity(unsigned int irq)
* @cpumask: cpumask
*
*/
int irq_set_affinity(unsigned int irq, cpumask_t cpumask)
int irq_set_affinity(unsigned int irq, const struct cpumask *cpumask)
{
struct irq_desc *desc = irq_to_desc(irq);
unsigned long flags;
@@ -91,14 +91,14 @@ int irq_set_affinity(unsigned int irq, cpumask_t cpumask)
#ifdef CONFIG_GENERIC_PENDING_IRQ
if (desc->status & IRQ_MOVE_PCNTXT || desc->status & IRQ_DISABLED) {
desc->affinity = cpumask;
cpumask_copy(&desc->affinity, cpumask);
desc->chip->set_affinity(irq, cpumask);
} else {
desc->status |= IRQ_MOVE_PENDING;
desc->pending_mask = cpumask;
cpumask_copy(&desc->pending_mask, cpumask);
}
#else
desc->affinity = cpumask;
cpumask_copy(&desc->affinity, cpumask);
desc->chip->set_affinity(irq, cpumask);
#endif
desc->status |= IRQ_AFFINITY_SET;
@@ -112,26 +112,24 @@ int irq_set_affinity(unsigned int irq, cpumask_t cpumask)
*/
int do_irq_select_affinity(unsigned int irq, struct irq_desc *desc)
{
cpumask_t mask;
if (!irq_can_set_affinity(irq))
return 0;
cpus_and(mask, cpu_online_map, irq_default_affinity);
/*
* Preserve an userspace affinity setup, but make sure that
* one of the targets is online.
*/
if (desc->status & (IRQ_AFFINITY_SET | IRQ_NO_BALANCING)) {
if (cpus_intersects(desc->affinity, cpu_online_map))
mask = desc->affinity;
if (cpumask_any_and(&desc->affinity, cpu_online_mask)
< nr_cpu_ids)
goto set_affinity;
else
desc->status &= ~IRQ_AFFINITY_SET;
}
desc->affinity = mask;
desc->chip->set_affinity(irq, mask);
cpumask_and(&desc->affinity, cpu_online_mask, &irq_default_affinity);
set_affinity:
desc->chip->set_affinity(irq, &desc->affinity);
return 0;
}