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Message-Id: <20211218100511.42508-2-sander@svanheule.net>
Date: Sat, 18 Dec 2021 11:05:10 +0100
From: Sander Vanheule <sander@...nheule.net>
To: linux-mips@...r.kernel.org
Cc: INAGAKI Hiroshi <musashino.open@...il.com>,
Jiaxun Yang <jiaxun.yang@...goat.com>,
Paul Burton <paulburton@...nel.org>,
Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
linux-kernel@...r.kernel.org,
Sander Vanheule <sander@...nheule.net>
Subject: [PATCH v2 1/2] MIPS: only register MT SMP ops if MT is supported
Verify that the current CPU actually supports multi-threading before
registering MT SMP ops, instead of unconditionally registering them if
the kernel is compiled with CONFIG_MIPS_MT_SMP.
Suggested-by: Jiaxun Yang <jiaxun.yang@...goat.com>
Signed-off-by: Sander Vanheule <sander@...nheule.net>
---
arch/mips/include/asm/smp-ops.h | 3 +++
1 file changed, 3 insertions(+)
diff --git a/arch/mips/include/asm/smp-ops.h b/arch/mips/include/asm/smp-ops.h
index 65618ff1280c..864aea803984 100644
--- a/arch/mips/include/asm/smp-ops.h
+++ b/arch/mips/include/asm/smp-ops.h
@@ -101,6 +101,9 @@ static inline int register_vsmp_smp_ops(void)
#ifdef CONFIG_MIPS_MT_SMP
extern const struct plat_smp_ops vsmp_smp_ops;
+ if (!cpu_has_mipsmt)
+ return -ENODEV;
+
register_smp_ops(&vsmp_smp_ops);
return 0;
--
2.33.1
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