linux-kernel - [PATCH 05/14] MIPS: OCTEON: Delete unused COP2 saving code

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Message-Id: <1418666603-15159-6-git-send-email-aleksey.makarov@auriga.com>
Date:	Mon, 15 Dec 2014 21:03:11 +0300
From:	Aleksey Makarov <feumilieu@...il.com>
To:	linux-mips@...ux-mips.org
Cc:	linux-kernel@...r.kernel.org, David Daney <david.daney@...ium.com>,
	Aleksey Makarov <aleksey.makarov@...iga.com>,
	Ralf Baechle <ralf@...ux-mips.org>
Subject: [PATCH 05/14] MIPS: OCTEON: Delete unused COP2 saving code

Commit 2c952e06e4f5 ("MIPS: Move cop2 save/restore to switch_to()")
removes assembler code to store COP2 registers.  Commit
a36d8225bceb ("MIPS: OCTEON: Enable use of FPU") mistakenly
restores it

Fixes: a36d8225bceb ("MIPS: OCTEON: Enable use of FPU")
Signed-off-by: Aleksey Makarov <aleksey.makarov@...iga.com>
---
 arch/mips/kernel/octeon_switch.S | 26 --------------------------
 1 file changed, 26 deletions(-)

diff --git a/arch/mips/kernel/octeon_switch.S b/arch/mips/kernel/octeon_switch.S
index f0a699d..423ae83 100644
--- a/arch/mips/kernel/octeon_switch.S
+++ b/arch/mips/kernel/octeon_switch.S
@@ -52,32 +52,6 @@
 	.set pop
 1:
 
-	/* check if we need to save COP2 registers */
-	LONG_L	t0, ST_OFF(t3)
-	bbit0	t0, 30, 1f
-
-	/* Disable COP2 in the stored process state */
-	li	t1, ST0_CU2
-	xor	t0, t1
-	LONG_S	t0, ST_OFF(t3)
-
-	/* Enable COP2 so we can save it */
-	mfc0	t0, CP0_STATUS
-	or	t0, t1
-	mtc0	t0, CP0_STATUS
-
-	/* Save COP2 */
-	daddu	a0, THREAD_CP2
-	jal octeon_cop2_save
-	dsubu	a0, THREAD_CP2
-
-	/* Disable COP2 now that we are done */
-	mfc0	t0, CP0_STATUS
-	li	t1, ST0_CU2
-	xor	t0, t1
-	mtc0	t0, CP0_STATUS
-
-1:
 #if CONFIG_CAVIUM_OCTEON_CVMSEG_SIZE > 0
 	/* Check if we need to store CVMSEG state */
 	dmfc0	t0, $11,7	/* CvmMemCtl */
-- 
2.1.3

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