[PATCH] arm64: add DSB after icache flush in __flush_icache_all()
Vinayak Kale
vkale at apm.com
Wed Feb 5 04:34:36 EST 2014
Add DSB after icache flush to complete the cache maintenance operation.
The function __flush_icache_all() is used only for user space mappings
and an ISB is not required because of an exception return before executing
user instructions. An exception return would behave like an ISB.
Signed-off-by: Vinayak Kale <vkale at apm.com>
---
arch/arm64/include/asm/cacheflush.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/arm64/include/asm/cacheflush.h b/arch/arm64/include/asm/cacheflush.h
index fea9ee3..88932498 100644
--- a/arch/arm64/include/asm/cacheflush.h
+++ b/arch/arm64/include/asm/cacheflush.h
@@ -116,6 +116,7 @@ extern void flush_dcache_page(struct page *);
static inline void __flush_icache_all(void)
{
asm("ic ialluis");
+ dsb();
}
#define flush_dcache_mmap_lock(mapping) \
--
1.7.9.5
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