linux-kernel - [PATCH 4.0 25/72] MIPS: smp-cps: cpu

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Date:	Mon, 11 May 2015 10:54:31 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Niklas Cassel <niklass@...s.com>, paul.burton@...tec.com,
	linux-mips@...ux-mips.org, Ralf Baechle <ralf@...ux-mips.org>
Subject: [PATCH 4.0 25/72] MIPS: smp-cps: cpu_set FPU mask if FPU present

4.0-stable review patch.  If anyone has any objections, please let me know.

------------------


From: Niklas Cassel <niklas.cassel@...s.com>

Commit 90db024f140d0d6ad960cc5f090e3c8ed890ca55 upstream.

If we have an FPU, enroll ourselves in the FPU-full mask.
Matching the MT_SMP and CMP implementations of smp_setup.

Signed-off-by: Niklas Cassel <niklass@...s.com>
Cc: paul.burton@...tec.com
Cc: linux-mips@...ux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/8948/
Signed-off-by: Ralf Baechle <ralf@...ux-mips.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 arch/mips/kernel/smp-cps.c |    6 ++++++
 1 file changed, 6 insertions(+)

--- a/arch/mips/kernel/smp-cps.c
+++ b/arch/mips/kernel/smp-cps.c
@@ -88,6 +88,12 @@ static void __init cps_smp_setup(void)
 
 	/* Make core 0 coherent with everything */
 	write_gcr_cl_coherence(0xff);
+
+#ifdef CONFIG_MIPS_MT_FPAFF
+	/* If we have an FPU, enroll ourselves in the FPU-full mask */
+	if (cpu_has_fpu)
+		cpu_set(0, mt_fpu_cpumask);
+#endif /* CONFIG_MIPS_MT_FPAFF */
 }
 
 static void __init cps_prepare_cpus(unsigned int max_cpus)


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