[mirror_ubuntu-artful-kernel.git] / arch / s390 / include / asm / jump_label.h

#ifndef _ASM_S390_JUMP_LABEL_H
#define _ASM_S390_JUMP_LABEL_H

#include <linux/types.h>

#define JUMP_LABEL_NOP_SIZE 6

#ifdef CONFIG_64BIT
#define ASM_PTR ".quad"
#define ASM_ALIGN ".balign 8"
#else
#define ASM_PTR ".long"
#define ASM_ALIGN ".balign 4"
#endif

static __always_inline bool arch_static_branch(struct jump_label_key *key)
{
	asm goto("0:	brcl 0,0\n"
		".pushsection __jump_table, \"aw\"\n"
		ASM_ALIGN "\n"
		ASM_PTR " 0b, %l[label], %0\n"
		".popsection\n"
		: : "X" (key) : : label);
	return false;
label:
	return true;
}

typedef unsigned long jump_label_t;

struct jump_entry {
	jump_label_t code;
	jump_label_t target;
	jump_label_t key;
};

#endif
Commit	Line	Data
5373db88 JG	1	#ifndef _ASM_S390_JUMP_LABEL_H
	2	#define _ASM_S390_JUMP_LABEL_H
	3
	4	#include <linux/types.h>
	5
	6	#define JUMP_LABEL_NOP_SIZE 6
	7
	8	#ifdef CONFIG_64BIT
	9	#define ASM_PTR ".quad"
	10	#define ASM_ALIGN ".balign 8"
	11	#else
	12	#define ASM_PTR ".long"
	13	#define ASM_ALIGN ".balign 4"
	14	#endif
	15
	16	static __always_inline bool arch_static_branch(struct jump_label_key *key)
	17	{
	18	asm goto("0: brcl 0,0\n"
	19	".pushsection __jump_table, \"aw\"\n"
	20	ASM_ALIGN "\n"
	21	ASM_PTR " 0b, %l[label], %0\n"
	22	".popsection\n"
	23	: : "X" (key) : : label);
	24	return false;
	25	label:
	26	return true;
	27	}
	28
	29	typedef unsigned long jump_label_t;
	30
	31	struct jump_entry {
	32	jump_label_t code;
	33	jump_label_t target;
	34	jump_label_t key;
	35	};
	36
	37	#endif