Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

[linux-2.6-microblaze.git] / arch / arm / mach-vexpress / dcscb.c

diff --git a/arch/arm/mach-vexpress/dcscb.c b/arch/arm/mach-vexpress/dcscb.c
index 14d4996..788495d 100644 (file)
--- a/arch/arm/mach-vexpress/dcscb.c
+++ b/arch/arm/mach-vexpress/dcscb.c
@@ -137,11 +137,16 @@ static void dcscb_power_down(void)
                v7_exit_coherency_flush(all);
 
                /*
-                * This is a harmless no-op.  On platforms with a real
-                * outer cache this might either be needed or not,
-                * depending on where the outer cache sits.
+                * A full outer cache flush could be needed at this point
+                * on platforms with such a cache, depending on where the
+                * outer cache sits. In some cases the notion of a "last
+                * cluster standing" would need to be implemented if the
+                * outer cache is shared across clusters. In any case, when
+                * the outer cache needs flushing, there is no concurrent
+                * access to the cache controller to worry about and no
+                * special locking besides what is already provided by the
+                * MCPM state machinery is needed.
                 */
-               outer_flush_all();
 
                /*
                 * Disable cluster-level coherency by masking