[GitHub/exynos8895/android_kernel_samsung_universal8895.git] / arch / arm64 / include / asm / current.h

#ifndef __ASM_CURRENT_H
#define __ASM_CURRENT_H

#include <linux/compiler.h>

#include <asm/sysreg.h>

#ifndef __ASSEMBLY__

#ifdef CONFIG_THREAD_INFO_IN_TASK
struct task_struct;

/*
 * We don't use read_sysreg() as we want the compiler to cache the value where
 * possible.
 */
static __always_inline struct task_struct *get_current(void)
{
	unsigned long sp_el0;

	asm ("mrs %0, sp_el0" : "=r" (sp_el0));

	return (struct task_struct *)sp_el0;
}
#define current get_current()
#else
#include <linux/thread_info.h>
#define get_current() (current_thread_info()->task)
#define current get_current()
#endif

#endif /* __ASSEMBLY__ */

#endif /* __ASM_CURRENT_H */
Commit	Line	Data
4ca3c2cf MR	1	#ifndef __ASM_CURRENT_H
	2	#define __ASM_CURRENT_H
	3
	4	#include <linux/compiler.h>
	5
	6	#include <asm/sysreg.h>
	7
	8	#ifndef __ASSEMBLY__
	9
	10	#ifdef CONFIG_THREAD_INFO_IN_TASK
	11	struct task_struct;
	12
b32ed105 MR	13	/*
	14	* We don't use read_sysreg() as we want the compiler to cache the value where
	15	* possible.
	16	*/
4ca3c2cf MR	17	static __always_inline struct task_struct *get_current(void)
4ca3c2cf MR	18	{
b32ed105 MR	19	unsigned long sp_el0;
	20
	21	asm ("mrs %0, sp_el0" : "=r" (sp_el0));
	22
	23	return (struct task_struct *)sp_el0;
4ca3c2cf MR	24	}
	25	#define current get_current()
	26	#else
	27	#include <linux/thread_info.h>
	28	#define get_current() (current_thread_info()->task)
	29	#define current get_current()
	30	#endif
	31
	32	#endif /* __ASSEMBLY__ */
	33
	34	#endif /* __ASM_CURRENT_H */
	35