From: will.deacon@arm.com (Will Deacon)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2 01/12] ARM: mm: remove redundant dsb() prior to range TLB invalidation
Date: Thu, 20 Jun 2013 15:21:15 +0100 [thread overview]
Message-ID: <1371738086-6707-2-git-send-email-will.deacon@arm.com> (raw)
In-Reply-To: <1371738086-6707-1-git-send-email-will.deacon@arm.com>
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(-)
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
next prev parent reply other threads:[~2013-06-20 14:21 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-20 14:21 [PATCH v2 00/12] Make use of v7 barrier variants in Linux Will Deacon
2013-06-20 14:21 ` Will Deacon [this message]
2013-06-20 14:21 ` [PATCH v2 02/12] ARM: tlb: don't perform inner-shareable invalidation for local TLB ops Will Deacon
2013-06-20 14:21 ` [PATCH v2 03/12] ARM: tlb: don't bother with barriers for branch predictor maintenance Will Deacon
2013-06-20 14:21 ` [PATCH v2 04/12] ARM: tlb: don't perform inner-shareable invalidation for local BP ops Will Deacon
2013-06-20 14:21 ` [PATCH v2 05/12] ARM: barrier: allow options to be passed to memory barrier instructions Will Deacon
2013-06-21 8:37 ` Ming Lei
2013-06-21 8:51 ` Will Deacon
2013-06-21 8:53 ` Ming Lei
2013-06-20 14:21 ` [PATCH v2 06/12] ARM: tlb: reduce scope of barrier domains for TLB invalidation Will Deacon
2013-06-20 14:21 ` [PATCH v2 07/12] ARM: mm: use inner-shareable barriers for TLB and user cache operations Will Deacon
2013-06-20 14:21 ` [PATCH v2 08/12] ARM: spinlock: use inner-shareable dsb variant prior to sev instruction Will Deacon
2013-06-20 14:21 ` [PATCH v2 09/12] ARM: kvm: use inner-shareable barriers after TLB flushing Will Deacon
2013-06-20 14:21 ` [PATCH v2 10/12] ARM: mcpm: use -st dsb option prior to sev instructions Will Deacon
2013-06-20 14:21 ` [PATCH v2 11/12] ARM: l2x0: use -st dsb option for ordering writel_relaxed with unlock Will Deacon
2013-06-20 14:21 ` [PATCH v2 12/12] ARM: cacheflush: use -ishst dsb variant for ensuring flush completion Will Deacon
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