[PATCH v6 3/5] ARM: soft_restart: disable the outer L2 when the last CPU is going down

[Will Deacon]

Soft-restarting a system with an outer, shared L2 requires us to disable
it when no other CPUs are running.

This patch adds an outer_disable call to soft_restart so that the last
CPU going down will disable the L2 cache.

Signed-off-by: Will Deacon <will.deacon at arm.com>
---
 arch/arm/kernel/process.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c
index 577d092..664d351 100644
--- a/arch/arm/kernel/process.c
+++ b/arch/arm/kernel/process.c
@@ -137,6 +137,10 @@ void soft_restart(unsigned long addr)
 	local_irq_disable();
 	local_fiq_disable();
 
+	/* Disable the L2 if we're the last man standing. */
+	if (num_online_cpus() == 1)
+		outer_disable();
+
 	/* Change to the new stack and continue with the reset. */
 	call_with_stack(__soft_restart, (void *)addr, (void *)stack);
 
-- 
1.7.4.1