ARM: 7957/1: add DSB after icache flush in __flush_icache_all()
Add DSB after icache flush to complete the cache maintenance operation. Signed-off-by: NVinayak Kale <vkale@apm.com> Acked-by: NCatalin Marinas <catalin.marinas@arm.com> Cc: <stable@vger.kernel.org> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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