https://github.com/torvalds/linux
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Tip revision: fa389e220254c69ffae0d403eac4146171062d08 authored by Linus Torvalds on 10 March 2014, 02:41:57 UTC
Linux 3.14-rc6
Tip revision: fa389e2
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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