From: Markos Chandras <markos.chandras@imgtec.com>
Date: Thu, 9 Jul 2015 09:40:50 +0000 (+0100)
Subject: MIPS: cpu-probe: Remove cp0 hazard barrier when enabling the FTLB
X-Git-Tag: firefly_0821_release~176^2~1148^2~130
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=c982c6d6c48b48159db481581cadbb8773219677;p=firefly-linux-kernel-4.4.55.git

MIPS: cpu-probe: Remove cp0 hazard barrier when enabling the FTLB

We are so early in the boot process where we really don't want to
stall and wait for CP0 FTLB related changes become visible so just drop
the cp0 hazard barrier.

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/10649/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
---

diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c
index 02b75127dad3..dc057f37305b 100644
--- a/arch/mips/kernel/cpu-probe.c
+++ b/arch/mips/kernel/cpu-probe.c
@@ -385,7 +385,6 @@ static void set_ftlb_enable(struct cpuinfo_mips *c, int enable)
 		else
 			/* Disable FTLB */
 			write_c0_config6(config6 &  ~MIPS_CONF6_FTLBEN);
-		back_to_back_c0_hazard();
 		break;
 	}
 }