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| author | Vinayak Kale <vkale@apm.com> | 2014-02-05 09:34:36 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-02-20 11:10:08 -0800 |
| commit | 38f1e0b502245774e989e0f057bd710626330532 (patch) | |
| tree | 24938a8500f41714dc3c2c4318c3c8f3e615534c | |
| parent | d8cec633b0488655ac324684d4cf53e312bcdf41 (diff) | |
| download | lwn-38f1e0b502245774e989e0f057bd710626330532.tar.gz lwn-38f1e0b502245774e989e0f057bd710626330532.zip | |
arm64: add DSB after icache flush in __flush_icache_all()
commit 5044bad43ee573d0b6d90e3ccb7a40c2c7d25eb4 upstream.
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>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | arch/arm64/include/asm/cacheflush.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/cacheflush.h b/arch/arm64/include/asm/cacheflush.h index fea9ee327206..889324981aa4 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) \ |