[PATCH] irqchip: gic: Don't complain in gic_get_cpumask() if UP system
Stephen Boyd
sboyd at codeaurora.org
Fri Jan 30 16:43:30 PST 2015
In a uniprocessor implementation the interrupt processor targets
registers are read-as-zero/write-ignored (RAZ/WI). Unfortunately
gic_get_cpumask() will print a critical message saying
GIC CPU mask not found - kernel will fail to boot.
if these registers all read as zero, but there won't actually be
a problem on uniprocessor systems and the kernel will boot just
fine. Skip this check if we're running a UP kernel or if we
detect that the hardware only supports a single processor.
Acked-by: Nicolas Pitre <nico at linaro.org>
Cc: Russell King <rmk+kernel at arm.linux.org.uk>
Cc: Stefan Agner <stefan at agner.ch>
Signed-off-by: Stephen Boyd <sboyd at codeaurora.org>
---
drivers/irqchip/irq-gic.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/irqchip/irq-gic.c b/drivers/irqchip/irq-gic.c
index d617ee5a3d8a..1b70e0de0f6e 100644
--- a/drivers/irqchip/irq-gic.c
+++ b/drivers/irqchip/irq-gic.c
@@ -346,7 +346,7 @@ static u8 gic_get_cpumask(struct gic_chip_data *gic)
break;
}
- if (!mask)
+ if (!mask && num_possible_cpus() > 1)
pr_crit("GIC CPU mask not found - kernel will fail to boot.\n");
return mask;
--
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