Merge tag 'locks-v3.16-2' of git://git.samba.org/jlayton/linux
[linux/fpc-iii.git] / arch / powerpc / include / asm / jump_label.h
blobf016bb699b5f6200268d3b8e5bf4e2bd003dbbf7
1 #ifndef _ASM_POWERPC_JUMP_LABEL_H
2 #define _ASM_POWERPC_JUMP_LABEL_H
4 /*
5 * Copyright 2010 Michael Ellerman, IBM Corp.
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version
10 * 2 of the License, or (at your option) any later version.
13 #include <linux/types.h>
15 #include <asm/feature-fixups.h>
17 #define JUMP_ENTRY_TYPE stringify_in_c(FTR_ENTRY_LONG)
18 #define JUMP_LABEL_NOP_SIZE 4
20 static __always_inline bool arch_static_branch(struct static_key *key)
22 asm_volatile_goto("1:\n\t"
23 "nop\n\t"
24 ".pushsection __jump_table, \"aw\"\n\t"
25 JUMP_ENTRY_TYPE "1b, %l[l_yes], %c0\n\t"
26 ".popsection \n\t"
27 : : "i" (key) : : l_yes);
28 return false;
29 l_yes:
30 return true;
33 #ifdef CONFIG_PPC64
34 typedef u64 jump_label_t;
35 #else
36 typedef u32 jump_label_t;
37 #endif
39 struct jump_entry {
40 jump_label_t code;
41 jump_label_t target;
42 jump_label_t key;
45 #endif /* _ASM_POWERPC_JUMP_LABEL_H */