add 4 io

hc

2023-08-21 ef9e1ccebba20d2e3859126411166909a383f483

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#ifndef _TOOLS_ASM_EXPORT_H
#define _TOOLS_ASM_EXPORT_H
 
#define EXPORT_SYMBOL(x)
#define EXPORT_SYMBOL_GPL(x)
 
#endif /* _TOOLS_ASM_EXPORT_H */