diff mbox series

[v2,1/2] MIPS: only register MT SMP ops if MT is supported

Message ID 20211218100511.42508-2-sander@svanheule.net (mailing list archive)
State Accepted
Commit 047ff68b43d4dc912dd89d8e156e74af9f69ca93
Headers show
Series Support MT SMP on generic MIPS kernel | expand

Commit Message

Sander Vanheule Dec. 18, 2021, 10:05 a.m. UTC 
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@flygoat.com>
Signed-off-by: Sander Vanheule <sander@svanheule.net>
---
 arch/mips/include/asm/smp-ops.h | 3 +++
 1 file changed, 3 insertions(+)
diff mbox series

Patch

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;