On 01:09-20150131, Felipe Balbi wrote:

+linux-omap

On Fri, Jan 30, 2015 at 04:43:30PM -0800, Stephen Boyd wrote:

quoted

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.

Nice, I'll test this on AM437x on Monday but certainly looks promising:

Acked-by: Felipe Balbi <redacted>

quoted

Acked-by: Nicolas Pitre <redacted>
Cc: Russell King <redacted>
Cc: Stefan Agner <stefan@agner.ch>
Signed-off-by: Stephen Boyd <redacted>
---
 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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-- 
balbi

Acked-by: Nishanth Menon <nm@ti.com>
-- 
Regards,
Nishanth Menon