add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/include/linux/percpu_counter.h
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@@ -44,6 +44,7 @@
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 			      s32 batch);
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 s64 __percpu_counter_sum(struct percpu_counter *fbc);
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 int __percpu_counter_compare(struct percpu_counter *fbc, s64 rhs, s32 batch);
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+void percpu_counter_sync(struct percpu_counter *fbc);
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 static inline int percpu_counter_compare(struct percpu_counter *fbc, s64 rhs)
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 {
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@@ -172,6 +173,9 @@
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 	return true;
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 }
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+static inline void percpu_counter_sync(struct percpu_counter *fbc)
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+{
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+}
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 #endif	/* CONFIG_SMP */
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 static inline void percpu_counter_inc(struct percpu_counter *fbc)