From mboxrd@z Thu Jan 1 00:00:00 1970 From: will.deacon@arm.com (Will Deacon) Date: Thu, 20 Jun 2013 15:21:15 +0100 Subject: [PATCH v2 01/12] ARM: mm: remove redundant dsb() prior to range TLB invalidation In-Reply-To: <1371738086-6707-1-git-send-email-will.deacon@arm.com> References: <1371738086-6707-1-git-send-email-will.deacon@arm.com> Message-ID: <1371738086-6707-2-git-send-email-will.deacon@arm.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org The kernel TLB range invalidation functions already contain dsb instructions before and after the maintenance, so there is no need to introduce additional barriers. Reviewed-by: Catalin Marinas Signed-off-by: Will Deacon --- arch/arm/mm/dma-mapping.c | 1 - 1 file changed, 1 deletion(-) diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c index ef3e0f3..5baabf7 100644 --- a/arch/arm/mm/dma-mapping.c +++ b/arch/arm/mm/dma-mapping.c @@ -455,7 +455,6 @@ static void __dma_remap(struct page *page, size_t size, pgprot_t prot) unsigned end = start + size; apply_to_page_range(&init_mm, start, size, __dma_update_pte, &prot); - dsb(); flush_tlb_kernel_range(start, end); } -- 1.8.2.2