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arm64: add DSB after icache flush in __flush_icache_all() 

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@apm.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
hifive-unleashed-5.1
Vinayak Kale 2014-02-05 09:34:36 +00:00 committed by Catalin Marinas
parent 4050740348
commit 5044bad43e
1 changed files with 1 additions and 0 deletions
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arch/arm64/include/asm/cacheflush.h
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@ -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) \