add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/include/vdso/vsyscall.h
..
..
@@ -6,6 +6,9 @@
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 #include <asm/vdso/vsyscall.h>
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+unsigned long vdso_update_begin(void);
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+void vdso_update_end(unsigned long flags);
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+
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 #endif /* !__ASSEMBLY__ */
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 #endif /* __VDSO_VSYSCALL_H */