irqchip: gic: Don't complain in gic_get_cpumask() if UP system
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 <[email protected]>
Acked-by: Felipe Balbi <[email protected]>
Acked-by: Nishanth Menon <[email protected]>
Acked-by: Stefan Agner <[email protected]>
Cc: Russell King <[email protected]>
Signed-off-by: Stephen Boyd <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Jason Cooper <[email protected]>
diff --git a/drivers/irqchip/irq-gic.c b/drivers/irqchip/irq-gic.c
index 4634cf7..50e70a8 100644
--- a/drivers/irqchip/irq-gic.c
+++ b/drivers/irqchip/irq-gic.c
@@ -349,7 +349,7 @@
break;
}
- if (!mask)
+ if (!mask && num_possible_cpus() > 1)
pr_crit("GIC CPU mask not found - kernel will fail to boot.\n");
return mask;
