https://github.com/torvalds/linux
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Tip revision: f6161aa153581da4a3867a2d1a7caf4be19b6ec9 authored by Linus Torvalds on 10 March 2013, 23:54:19 UTC
Linux 3.9-rc2
Tip revision: f6161aa
ioctl.h
#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 */
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