From mboxrd@z Thu Jan 1 00:00:00 1970 From: vkale@apm.com (Vinayak Kale) Date: Wed, 5 Feb 2014 15:04:36 +0530 Subject: [PATCH] arm64: add DSB after icache flush in __flush_icache_all() Message-ID: <1391592876-18627-1-git-send-email-vkale@apm.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 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 --- 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