Commit-ID: 3fad4cdac235c5b13227d0c09854c689ae62c70b
Gitweb: http://git.kernel.org/tip/3fad4cdac235c5b13227d0c09854c689ae62c70b
Author: zijun_hu <zijun_hu@xxxxxxx>
AuthorDate: Sat, 16 Sep 2017 01:59:41 +0800
Committer: Marc Zyngier <marc.zyngier@xxxxxxx>
CommitDate: Tue, 19 Sep 2017 19:42:14 +0100
irqchip/gic-v3: Iterate over possible CPUs by for_each_possible_cpu()
get_cpu_number() doesn't use existing helper to iterate over possible
CPUs, It will cause an error in case of discontinuous @cpu_possible_mask
such as 0b11110001, which can result from a core having failed to come
up on a SMP machine.
Fixed by using existing helper for_each_possible_cpu().
Signed-off-by: zijun_hu <zijun_hu@xxxxxxx>
Signed-off-by: Marc Zyngier <marc.zyngier@xxxxxxx>
---
drivers/irqchip/irq-gic-v3.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/irqchip/irq-gic-v3.c b/drivers/irqchip/irq-gic-v3.c
index 519149e..b5df99c 100644
--- a/drivers/irqchip/irq-gic-v3.c
+++ b/drivers/irqchip/irq-gic-v3.c
@@ -1042,7 +1042,7 @@ static int get_cpu_number(struct device_node *dn)
{
const __be32 *cell;
u64 hwid;
- int i;
+ int cpu;
cell = of_get_property(dn, "reg", NULL);
if (!cell)
@@ -1056,9 +1056,9 @@ static int get_cpu_number(struct device_node *dn)
if (hwid & ~MPIDR_HWID_BITMASK)
return -1;
- for (i = 0; i < num_possible_cpus(); i++)
- if (cpu_logical_map(i) == hwid)
- return i;
+ for_each_possible_cpu(cpu)
+ if (cpu_logical_map(cpu) == hwid)
+ return cpu;
return -1;
}
--
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