Jan Glauber | 5373db8 | 2011-03-16 15:58:30 -0400 | [diff] [blame] | 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 |