Commit-ID: 6e3aca4419e1363ff9abb3e1710c52858fc45b66
Gitweb: http://git.kernel.org/tip/6e3aca4419e1363ff9abb3e1710c52858fc45b66
Author: Stephen Boyd <sboyd@xxxxxxxxxxxxxx>
AuthorDate: Wed, 11 Mar 2015 23:21:31 -0700
Committer: Jason Cooper <jason@xxxxxxxxxxxxxx>
CommitDate: Sun, 15 Mar 2015 01:37:14 +0000
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@xxxxxxxxxx>
Acked-by: Felipe Balbi <balbi@xxxxxx>
Acked-by: Nishanth Menon <nm@xxxxxx>
Acked-by: Stefan Agner <stefan@xxxxxxxx>
Cc: Russell King <rmk+kernel@xxxxxxxxxxxxxxxx>
Signed-off-by: Stephen Boyd <sboyd@xxxxxxxxxxxxxx>
Link: https://lkml.kernel.org/r/1426141291-21641-1-git-send-email-sboyd@xxxxxxxxxxxxxx
Signed-off-by: Jason Cooper <jason@xxxxxxxxxxxxxx>
---
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 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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