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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 | ||
c5905afb | 16 | static __always_inline bool arch_static_branch(struct static_key *key) |
5373db88 JG |
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 |