tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * Copyright (c) 2010 Cavium Networks, Inc.
7 */
8#ifndef _ASM_MIPS_JUMP_LABEL_H
9#define _ASM_MIPS_JUMP_LABEL_H
10
11#include <linux/types.h>
12
13#ifdef __KERNEL__
14
15#define JUMP_LABEL_NOP_SIZE 4
16
17#ifdef CONFIG_64BIT
18#define WORD_INSN ".dword"
19#else
20#define WORD_INSN ".word"
21#endif
22
23static __always_inline bool arch_static_branch(struct static_key *key)
24{
25 asm goto("1:\tnop\n\t"
26 "nop\n\t"
27 ".pushsection __jump_table, \"aw\"\n\t"
28 WORD_INSN " 1b, %l[l_yes], %0\n\t"
29 ".popsection\n\t"
30 : : "i" (key) : : l_yes);
31 return false;
32l_yes:
33 return true;
34}
35
36#endif /* __KERNEL__ */
37
38#ifdef CONFIG_64BIT
39typedef u64 jump_label_t;
40#else
41typedef u32 jump_label_t;
42#endif
43
44struct jump_entry {
45 jump_label_t code;
46 jump_label_t target;
47 jump_label_t key;
48};
49
50#endif /* _ASM_MIPS_JUMP_LABEL_H */