xref: /linux/arch/powerpc/include/asm/current.h (revision 976e3645923bdd2fe7893aae33fd7a21098bfb28) 
1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 #ifndef _ASM_POWERPC_CURRENT_H
3 #define _ASM_POWERPC_CURRENT_H
4 #ifdef __KERNEL__
5 
6 /*
7  */
8 
9 struct task_struct;
10 
11 #ifdef __powerpc64__
12 #include <linux/stddef.h>
13 #include <asm/paca.h>
14 
get_current(void)15 static inline struct task_struct *get_current(void)
16 {
17 	struct task_struct *task;
18 
19 	/* get_current can be cached by the compiler, so no volatile */
20 	asm ("ld %0,%1(13)"
21 	: "=r" (task)
22 	: "i" (offsetof(struct paca_struct, __current)));
23 
24 	return task;
25 }
26 #define current	get_current()
27 
28 #else
29 
30 /*
31  * We keep `current' in r2 for speed.
32  */
33 register struct task_struct *current asm ("r2");
34 
35 #endif
36 
37 #endif /* __KERNEL__ */
38 #endif /* _ASM_POWERPC_CURRENT_H */
39