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[PATCH] MIPS: Remove execution hazard barriers for Octeon.

To: linux-mips@linux-mips.org, ralf@linux-mips.org
Subject: [PATCH] MIPS: Remove execution hazard barriers for Octeon.
From: David Daney <ddaney@caviumnetworks.com>
Date: Mon, 11 May 2009 12:11:02 -0700
Cc: David Daney <ddaney@caviumnetworks.com>
Original-recipient: rfc822;linux-mips@linux-mips.org
Sender: linux-mips-bounce@linux-mips.org
The Octeon has no execution hazards, so we can remove them and save an
instruction per TLB handler invocation.

Signed-off-by: David Daney <ddaney@caviumnetworks.com>
---
 arch/mips/mm/tlbex.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/arch/mips/mm/tlbex.c b/arch/mips/mm/tlbex.c
index 3548acf..4b2ea1f 100644
--- a/arch/mips/mm/tlbex.c
+++ b/arch/mips/mm/tlbex.c
@@ -257,7 +257,7 @@ static void __cpuinit build_tlb_write_entry(u32 **p, struct 
uasm_label **l,
        case tlb_indexed: tlbw = uasm_i_tlbwi; break;
        }
 
-       if (cpu_has_mips_r2) {
+       if (cpu_has_mips_r2 && current_cpu_type() != CPU_CAVIUM_OCTEON) {
                uasm_i_ehb(p);
                tlbw(p);
                return;
-- 
1.6.0.6


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