add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/arch/powerpc/include/asm/imc-pmu.h
..
..
@@ -137,7 +137,7 @@
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  * are inited.
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  */
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 struct imc_pmu_ref {
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-	struct mutex lock;
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+	spinlock_t lock;
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 	unsigned int id;
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 	int refc;
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 };