From 1da027362a7db422243601e895e6f8288389f435 Mon Sep 17 00:00:00 2001 From: Marc Zyngier Date: Fri, 2 Apr 2021 12:50:14 +0100 Subject: irqdomain: Reimplement irq_linear_revmap() with irq_find_mapping() irq_linear_revmap() is supposed to be a fast path for domain lookups, but it only exposes low-level details of the irqdomain implementation, details which are better kept private. The *overhead* between the two is only a function call and a couple of tests, so it is likely that noone can show any meaningful difference compared to the cost of taking an interrupt. Reimplement irq_linear_revmap() with irq_find_mapping() in order to preserve source code compatibility, and rename the internal field for a measure. Signed-off-by: Marc Zyngier --- kernel/irq/irqdomain.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'kernel/irq/irqdomain.c') diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c index 6284443b87ec..8bd012253989 100644 --- a/kernel/irq/irqdomain.c +++ b/kernel/irq/irqdomain.c @@ -486,7 +486,7 @@ static void irq_domain_clear_mapping(struct irq_domain *domain, irq_hw_number_t hwirq) { if (hwirq < domain->revmap_size) { - domain->linear_revmap[hwirq] = 0; + domain->revmap[hwirq] = 0; } else { mutex_lock(&domain->revmap_tree_mutex); radix_tree_delete(&domain->revmap_tree, hwirq); @@ -499,7 +499,7 @@ static void irq_domain_set_mapping(struct irq_domain *domain, struct irq_data *irq_data) { if (hwirq < domain->revmap_size) { - domain->linear_revmap[hwirq] = irq_data->irq; + domain->revmap[hwirq] = irq_data->irq; } else { mutex_lock(&domain->revmap_tree_mutex); radix_tree_insert(&domain->revmap_tree, hwirq, irq_data); @@ -885,7 +885,7 @@ unsigned int irq_find_mapping(struct irq_domain *domain, /* Check if the hwirq is in the linear revmap. */ if (hwirq < domain->revmap_size) - return domain->linear_revmap[hwirq]; + return domain->revmap[hwirq]; rcu_read_lock(); data = radix_tree_lookup(&domain->revmap_tree, hwirq); -- cgit v1.2.3