tools/virtio/linux/compiler.h - linux-imx - Git at Google

 /* SPDX-License-Identifier: GPL-2.0 */
 #ifndef LINUX_COMPILER_H
 #define LINUX_COMPILER_H

 #define WRITE_ONCE(var, val) \
 	(*((volatile typeof(val) *)(&(var))) = (val))

 #define READ_ONCE(var) (*((volatile typeof(var) *)(&(var))))

 #endif
	/* SPDX-License-Identifier: GPL-2.0 */
	#ifndef LINUX_COMPILER_H
	#define LINUX_COMPILER_H

	#define WRITE_ONCE(var, val) \
	(((volatile typeof(val) )(&(var))) = (val))

	#define READ_ONCE(var) (((volatile typeof(var) )(&(var))))

	#endif