From 073352e951f60946452da358d64841066c3142ff Mon Sep 17 00:00:00 2001 From: Samuel Holland Date: Fri, 1 Jul 2022 15:00:54 -0500 Subject: genirq: Add and use an irq_data_update_affinity helper Some architectures and irqchip drivers modify the cpumask returned by irq_data_get_affinity_mask, usually by copying in to it. This is problematic for uniprocessor configurations, where the affinity mask should be constant, as it is known at compile time. Add and use a setter for the affinity mask, following the pattern of irq_data_update_effective_affinity. This allows the getter function to return a const cpumask pointer. Signed-off-by: Samuel Holland Reviewed-by: Oleksandr Tyshchenko # Xen bits Signed-off-by: Marc Zyngier Link: https://lore.kernel.org/r/20220701200056.46555-7-samuel@sholland.org --- drivers/parisc/iosapic.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/parisc') diff --git a/drivers/parisc/iosapic.c b/drivers/parisc/iosapic.c index 8a3b0c3a1e92..3a8c98615634 100644 --- a/drivers/parisc/iosapic.c +++ b/drivers/parisc/iosapic.c @@ -677,7 +677,7 @@ static int iosapic_set_affinity_irq(struct irq_data *d, if (dest_cpu < 0) return -1; - cpumask_copy(irq_data_get_affinity_mask(d), cpumask_of(dest_cpu)); + irq_data_update_affinity(d, cpumask_of(dest_cpu)); vi->txn_addr = txn_affinity_addr(d->irq, dest_cpu); spin_lock_irqsave(&iosapic_lock, flags); -- cgit v1.2.3