diff options
| author | Dawei Li <dawei.li@shingroup.cn> | 2024-04-16 16:54:52 +0800 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2024-04-24 21:23:49 +0200 |
| commit | 5d650d1eba876717888a0951ed873ef0f1d8cf61 (patch) | |
| tree | 56ffd62bba45a43a0d7bb808981d8faec179831b /drivers/irqchip/irq-riscv-aplic-direct.c | |
| parent | 2bc32db5a262cc34753cb4208b2d3043d1cd81ae (diff) | |
irqchip/riscv-aplic-direct: Avoid explicit cpumask allocation on stack
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>
Reviewed-by: Anup Patel <anup@brainfault.org>
Link: https://lore.kernel.org/r/20240416085454.3547175-6-dawei.li@shingroup.cn
Diffstat (limited to 'drivers/irqchip/irq-riscv-aplic-direct.c')
| -rw-r--r-- | drivers/irqchip/irq-riscv-aplic-direct.c | 7 |
1 files changed, 2 insertions, 5 deletions
diff --git a/drivers/irqchip/irq-riscv-aplic-direct.c b/drivers/irqchip/irq-riscv-aplic-direct.c index 06bace9b7497..4a3ffe856d6c 100644 --- a/drivers/irqchip/irq-riscv-aplic-direct.c +++ b/drivers/irqchip/irq-riscv-aplic-direct.c @@ -54,15 +54,12 @@ static int aplic_direct_set_affinity(struct irq_data *d, const struct cpumask *m struct aplic_direct *direct = container_of(priv, struct aplic_direct, priv); struct aplic_idc *idc; unsigned int cpu, val; - struct cpumask amask; void __iomem *target; - cpumask_and(&amask, &direct->lmask, mask_val); - if (force) - cpu = cpumask_first(&amask); + cpu = cpumask_first_and(&direct->lmask, mask_val); else - cpu = cpumask_any_and(&amask, cpu_online_mask); + cpu = cpumask_first_and_and(&direct->lmask, mask_val, cpu_online_mask); if (cpu >= nr_cpu_ids) return -EINVAL; |