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authorStephen Boyd <sboyd@codeaurora.org>2015-03-11 23:21:31 -0700
committerJason Cooper <jason@lakedaemon.net>2015-03-15 01:37:14 +0000
commit6e3aca4419e1363ff9abb3e1710c52858fc45b66 (patch)
tree379c2066639bd978b8c0ce22df64aed2da4d472f /drivers/irqchip
parentc9558659e68ee30740f265c54f792bf75add21f2 (diff)
downloadop-kernel-dev-6e3aca4419e1363ff9abb3e1710c52858fc45b66.zip
op-kernel-dev-6e3aca4419e1363ff9abb3e1710c52858fc45b66.tar.gz
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 <nico@linaro.org> Acked-by: Felipe Balbi <balbi@ti.com> Acked-by: Nishanth Menon <nm@ti.com> Acked-by: Stefan Agner <stefan@agner.ch> Cc: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> Link: https://lkml.kernel.org/r/1426141291-21641-1-git-send-email-sboyd@codeaurora.org Signed-off-by: Jason Cooper <jason@lakedaemon.net>
Diffstat (limited to 'drivers/irqchip')
-rw-r--r--drivers/irqchip/irq-gic.c2
1 files changed, 1 insertions, 1 deletions
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 @@ 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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