From 792a843a9f353d3e2474b6f5057b7eaecba41675 Mon Sep 17 00:00:00 2001 From: Will Deacon Date: Thu, 23 May 2013 18:24:21 +0100 Subject: [PATCH] ARM: mm: remove redundant dsb() prior to range TLB invalidation 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 7f9b1798c6cf..0c17f69a8286 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); } -- 2.34.1