[linux-2.6-block.git] / arch / arm / include / asm / jump_label.h

#ifndef _ASM_ARM_JUMP_LABEL_H
#define _ASM_ARM_JUMP_LABEL_H

#ifdef __KERNEL__

#include <linux/types.h>
#include <asm/system.h>

#define JUMP_LABEL_NOP_SIZE 4

#ifdef CONFIG_THUMB2_KERNEL
#define JUMP_LABEL_NOP	"nop.w"
#else
#define JUMP_LABEL_NOP	"nop"
#endif

static __always_inline bool arch_static_branch(struct static_key *key)
{
	asm goto("1:\n\t"
		 JUMP_LABEL_NOP "\n\t"
		 ".pushsection __jump_table,  \"aw\"\n\t"
		 ".word 1b, %l[l_yes], %c0\n\t"
		 ".popsection\n\t"
		 : :  "i" (key) :  : l_yes);

	return false;
l_yes:
	return true;
}

#endif /* __KERNEL__ */

typedef u32 jump_label_t;

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

#endif
Commit	Line	Data
09f05d85 RV	1	#ifndef _ASM_ARM_JUMP_LABEL_H
	2	#define _ASM_ARM_JUMP_LABEL_H
	3
	4	#ifdef __KERNEL__
	5
	6	#include <linux/types.h>
	7	#include <asm/system.h>
	8
	9	#define JUMP_LABEL_NOP_SIZE 4
	10
	11	#ifdef CONFIG_THUMB2_KERNEL
	12	#define JUMP_LABEL_NOP "nop.w"
	13	#else
	14	#define JUMP_LABEL_NOP "nop"
	15	#endif
	16
708e5978	17	static __always_inline bool arch_static_branch(struct static_key *key)
09f05d85 RV	18	{
	19	asm goto("1:\n\t"
	20	JUMP_LABEL_NOP "\n\t"
	21	".pushsection __jump_table, \"aw\"\n\t"
	22	".word 1b, %l[l_yes], %c0\n\t"
	23	".popsection\n\t"
	24	: : "i" (key) : : l_yes);
	25
	26	return false;
	27	l_yes:
	28	return true;
	29	}
	30
	31	#endif /* __KERNEL__ */
	32
	33	typedef u32 jump_label_t;
	34
	35	struct jump_entry {
	36	jump_label_t code;
	37	jump_label_t target;
	38	jump_label_t key;
	39	};
	40
	41	#endif