mirror of https://gitee.com/openkylin/linux.git
38 lines
669 B
C
38 lines
669 B
C
|
#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
|