From 7ac5ae4b122f9415948c642b945a26938aa8f347 Mon Sep 17 00:00:00 2001
From: Russell King <rmk@dyn-67.arm.linux.org.uk>
Date: Fri, 29 Jul 2005 16:36:48 +0100
Subject: [PATCH] [ARM SMP] Ensure secondary CPUs see their pen release

Since the secondary CPUs will not be operating in symetric mode
while they are held in the pen, we need to ensure that the write
to pen_release is visible to them, by flushing the cache.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
 arch/arm/mach-integrator/platsmp.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm/mach-integrator/platsmp.c b/arch/arm/mach-integrator/platsmp.c
index aecf47ba03..ea10bd8c97 100644
--- a/arch/arm/mach-integrator/platsmp.c
+++ b/arch/arm/mach-integrator/platsmp.c
@@ -15,6 +15,7 @@
 #include <linux/mm.h>
 
 #include <asm/atomic.h>
+#include <asm/cacheflush.h>
 #include <asm/delay.h>
 #include <asm/mmu_context.h>
 #include <asm/procinfo.h>
@@ -80,6 +81,7 @@ int __cpuinit boot_secondary(unsigned int cpu, struct task_struct *idle)
 	 * "cpu" is Linux's internal ID.
 	 */
 	pen_release = cpu;
+	flush_cache_all();
 
 	/*
 	 * XXX
-- 
2.39.5