From: will.deacon@arm.com (Will Deacon)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2 09/10] arm64: tlb: remove redundant barrier from __flush_tlb_pgtable
Date: Tue, 6 Oct 2015 18:46:29 +0100 [thread overview]
Message-ID: <1444153590-24173-10-git-send-email-will.deacon@arm.com> (raw)
In-Reply-To: <1444153590-24173-1-git-send-email-will.deacon@arm.com>
__flush_tlb_pgtable is used to invalidate intermediate page table
entries after they have been cleared and are about to be freed. Since
pXd_clear imply memory barriers, we don't need the extra one here.
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
---
arch/arm64/include/asm/tlbflush.h | 1 -
1 file changed, 1 deletion(-)
diff --git a/arch/arm64/include/asm/tlbflush.h b/arch/arm64/include/asm/tlbflush.h
index 93e9f964805c..b460ae28e346 100644
--- a/arch/arm64/include/asm/tlbflush.h
+++ b/arch/arm64/include/asm/tlbflush.h
@@ -163,7 +163,6 @@ static inline void __flush_tlb_pgtable(struct mm_struct *mm,
{
unsigned long addr = uaddr >> 12 | (ASID(mm) << 48);
- dsb(ishst);
asm("tlbi vae1is, %0" : : "r" (addr));
dsb(ish);
}
--
2.1.4
next prev parent reply other threads:[~2015-10-06 17:46 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-06 17:46 [PATCH v2 00/10] arm64 switch_mm improvements Will Deacon
2015-10-06 17:46 ` [PATCH v2 01/10] arm64: mm: remove unused cpu_set_idmap_tcr_t0sz function Will Deacon
2015-10-07 6:17 ` Ard Biesheuvel
2015-10-06 17:46 ` [PATCH v2 02/10] arm64: proc: de-scope TLBI operation during cold boot Will Deacon
2015-10-06 17:46 ` [PATCH v2 03/10] arm64: flush: use local TLB and I-cache invalidation Will Deacon
2015-10-07 1:18 ` David Daney
2015-10-07 6:18 ` Ard Biesheuvel
2015-10-06 17:46 ` [PATCH v2 04/10] arm64: mm: rewrite ASID allocator and MM context-switching code Will Deacon
2015-10-06 17:46 ` [PATCH v2 05/10] arm64: tlbflush: remove redundant ASID casts to (unsigned long) Will Deacon
2015-10-06 17:46 ` [PATCH v2 06/10] arm64: tlbflush: avoid flushing when fullmm == 1 Will Deacon
2015-10-06 17:46 ` [PATCH v2 07/10] arm64: switch_mm: simplify mm and CPU checks Will Deacon
2015-10-06 17:46 ` [PATCH v2 08/10] arm64: mm: kill mm_cpumask usage Will Deacon
2015-10-06 17:46 ` Will Deacon [this message]
2015-10-06 17:46 ` [PATCH v2 10/10] arm64: mm: remove dsb from update_mmu_cache Will Deacon
2015-10-07 10:59 ` [PATCH v2 00/10] arm64 switch_mm improvements Catalin Marinas
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