add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/tools/testing/radix-tree/linux/rcupdate.h
..
..
@@ -6,5 +6,7 @@
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 #define rcu_dereference_raw(p) rcu_dereference(p)
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 #define rcu_dereference_protected(p, cond) rcu_dereference(p)
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+#define rcu_dereference_check(p, cond) rcu_dereference(p)
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+#define RCU_INIT_POINTER(p, v)	do { (p) = (v); } while (0)
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 #endif