#ifndef _ASM_GENERIC_IOCTL_H#define _ASM_GENERIC_IOCTL_H #include <uapi/asm-generic/ioctl.h> /* provoke compile error for invalid uses of size argument */extern unsigned int __invalid_size_argument_for_IOC;#define _IOC_TYPECHECK(t) \	((sizeof(t) == sizeof(t[1]) && \	  sizeof(t) < (1 << _IOC_SIZEBITS)) ? \	  sizeof(t) : __invalid_size_argument_for_IOC)#endif /* _ASM_GENERIC_IOCTL_H */