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irqchip/irq-bcm6345-l1: Avoid explicit cpumask allocation on stack

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In general it's preferable to avoid placing cpumasks on the stack, as
for large values of NR_CPUS these can consume significant amounts of
stack space and make stack overflows more likely.

Use cpumask_first_and_and() to avoid the need for a temporary cpumask on
the stack.

Signed-off-by: Dawei Li <dawei.li@shingroup.cn>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20240416085454.3547175-3-dawei.li@shingroup.cn
This commit is contained in:
Dawei Li 2024-04-16 16:54:49 +08:00 committed by Thomas Gleixner
parent cdc66553c4
commit 6a9a52f74e
1 changed files with 1 additions and 5 deletions
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6
drivers/irqchip/irq-bcm6345-l1.c
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@ -192,14 +192,10 @@ static int bcm6345_l1_set_affinity(struct irq_data *d,
u32 mask = BIT(d->hwirq % IRQS_PER_WORD); u32 mask = BIT(d->hwirq % IRQS_PER_WORD);
unsigned int old_cpu = cpu_for_irq(intc, d); unsigned int old_cpu = cpu_for_irq(intc, d);
unsigned int new_cpu; unsigned int new_cpu;
struct cpumask valid;
unsigned long flags; unsigned long flags;
bool enabled; bool enabled;
if (!cpumask_and(&valid, &intc->cpumask, dest)) new_cpu = cpumask_first_and_and(&intc->cpumask, dest, cpu_online_mask);
return -EINVAL;
new_cpu = cpumask_any_and(&valid, cpu_online_mask);
if (new_cpu >= nr_cpu_ids) if (new_cpu >= nr_cpu_ids)
return -EINVAL; return -EINVAL;