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[v2,01/12] ARM: mm: remove redundant dsb() prior to range TLB invalidation

Message ID 1371738086-6707-2-git-send-email-will.deacon@arm.com (mailing list archive)
State New, archived
Headers show

Commit Message

Will Deacon June 20, 2013, 2:21 p.m. UTC 
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 <catalin.marinas@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
---
 arch/arm/mm/dma-mapping.c | 1 -
 1 file changed, 1 deletion(-)
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Patch

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);
 }