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jump_label.h
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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 static_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 {
35 };
36 
37 #endif