Commit | Line | Data |
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1da177e4 LT |
1 | /* thread_info.h: common low-level thread information accessors |
2 | * | |
3 | * Copyright (C) 2002 David Howells (dhowells@redhat.com) | |
4 | * - Incorporating suggestions made by Linus Torvalds | |
5 | */ | |
6 | ||
7 | #ifndef _LINUX_THREAD_INFO_H | |
8 | #define _LINUX_THREAD_INFO_H | |
9 | ||
ce6bd420 | 10 | #include <linux/types.h> |
edd63a27 | 11 | #include <linux/bug.h> |
53d74d05 | 12 | #include <linux/restart_block.h> |
a332d86d | 13 | |
c65eacbe | 14 | #ifdef CONFIG_THREAD_INFO_IN_TASK |
dc3d2a67 MR |
15 | /* |
16 | * For CONFIG_THREAD_INFO_IN_TASK kernels we need <asm/current.h> for the | |
17 | * definition of current, but for !CONFIG_THREAD_INFO_IN_TASK kernels, | |
18 | * including <asm/current.h> can cause a circular dependency on some platforms. | |
19 | */ | |
20 | #include <asm/current.h> | |
c65eacbe AL |
21 | #define current_thread_info() ((struct thread_info *)current) |
22 | #endif | |
23 | ||
1da177e4 LT |
24 | #include <linux/bitops.h> |
25 | #include <asm/thread_info.h> | |
26 | ||
27 | #ifdef __KERNEL__ | |
28 | ||
2889f608 | 29 | #ifdef CONFIG_DEBUG_STACK_USAGE |
5d097056 VD |
30 | # define THREADINFO_GFP (GFP_KERNEL_ACCOUNT | __GFP_NOTRACK | \ |
31 | __GFP_ZERO) | |
2889f608 | 32 | #else |
5d097056 | 33 | # define THREADINFO_GFP (GFP_KERNEL_ACCOUNT | __GFP_NOTRACK) |
2889f608 TG |
34 | #endif |
35 | ||
1da177e4 LT |
36 | /* |
37 | * flag set/clear/test wrappers | |
38 | * - pass TIF_xxxx constants to these functions | |
39 | */ | |
40 | ||
1da177e4 LT |
41 | static inline void set_ti_thread_flag(struct thread_info *ti, int flag) |
42 | { | |
5548fecd | 43 | set_bit(flag, (unsigned long *)&ti->flags); |
1da177e4 LT |
44 | } |
45 | ||
46 | static inline void clear_ti_thread_flag(struct thread_info *ti, int flag) | |
47 | { | |
5548fecd | 48 | clear_bit(flag, (unsigned long *)&ti->flags); |
1da177e4 LT |
49 | } |
50 | ||
51 | static inline int test_and_set_ti_thread_flag(struct thread_info *ti, int flag) | |
52 | { | |
5548fecd | 53 | return test_and_set_bit(flag, (unsigned long *)&ti->flags); |
1da177e4 LT |
54 | } |
55 | ||
56 | static inline int test_and_clear_ti_thread_flag(struct thread_info *ti, int flag) | |
57 | { | |
5548fecd | 58 | return test_and_clear_bit(flag, (unsigned long *)&ti->flags); |
1da177e4 LT |
59 | } |
60 | ||
61 | static inline int test_ti_thread_flag(struct thread_info *ti, int flag) | |
62 | { | |
5548fecd | 63 | return test_bit(flag, (unsigned long *)&ti->flags); |
1da177e4 LT |
64 | } |
65 | ||
3b66a1ed RZ |
66 | #define set_thread_flag(flag) \ |
67 | set_ti_thread_flag(current_thread_info(), flag) | |
68 | #define clear_thread_flag(flag) \ | |
69 | clear_ti_thread_flag(current_thread_info(), flag) | |
70 | #define test_and_set_thread_flag(flag) \ | |
71 | test_and_set_ti_thread_flag(current_thread_info(), flag) | |
72 | #define test_and_clear_thread_flag(flag) \ | |
73 | test_and_clear_ti_thread_flag(current_thread_info(), flag) | |
74 | #define test_thread_flag(flag) \ | |
75 | test_ti_thread_flag(current_thread_info(), flag) | |
76 | ||
ea811747 PZ |
77 | #define tif_need_resched() test_thread_flag(TIF_NEED_RESCHED) |
78 | ||
0f60a8ef KC |
79 | #ifndef CONFIG_HAVE_ARCH_WITHIN_STACK_FRAMES |
80 | static inline int arch_within_stack_frames(const void * const stack, | |
81 | const void * const stackend, | |
82 | const void *obj, unsigned long len) | |
83 | { | |
84 | return 0; | |
85 | } | |
86 | #endif | |
87 | ||
f5509cc1 KC |
88 | #ifdef CONFIG_HARDENED_USERCOPY |
89 | extern void __check_object_size(const void *ptr, unsigned long n, | |
90 | bool to_user); | |
91 | ||
a85d6b82 KC |
92 | static __always_inline void check_object_size(const void *ptr, unsigned long n, |
93 | bool to_user) | |
f5509cc1 | 94 | { |
81409e9e KC |
95 | if (!__builtin_constant_p(n)) |
96 | __check_object_size(ptr, n, to_user); | |
f5509cc1 KC |
97 | } |
98 | #else | |
99 | static inline void check_object_size(const void *ptr, unsigned long n, | |
100 | bool to_user) | |
101 | { } | |
102 | #endif /* CONFIG_HARDENED_USERCOPY */ | |
103 | ||
4e4c22c7 | 104 | #endif /* __KERNEL__ */ |
1da177e4 LT |
105 | |
106 | #endif /* _LINUX_THREAD_INFO_H */ |