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 SR |
10 | #include <linux/types.h> |
11 | ||
a332d86d TG |
12 | struct timespec; |
13 | struct compat_timespec; | |
14 | ||
1da177e4 | 15 | /* |
ce6bd420 | 16 | * System call restart block. |
1da177e4 LT |
17 | */ |
18 | struct restart_block { | |
19 | long (*fn)(struct restart_block *); | |
ce6bd420 | 20 | union { |
52400ba9 | 21 | /* For futex_wait and futex_wait_requeue_pi */ |
ce6bd420 | 22 | struct { |
a3c74c52 | 23 | u32 __user *uaddr; |
ce6bd420 SR |
24 | u32 val; |
25 | u32 flags; | |
cd689985 | 26 | u32 bitset; |
ce6bd420 | 27 | u64 time; |
a3c74c52 | 28 | u32 __user *uaddr2; |
ce6bd420 | 29 | } futex; |
a332d86d TG |
30 | /* For nanosleep */ |
31 | struct { | |
ab8177bc | 32 | clockid_t clockid; |
a332d86d TG |
33 | struct timespec __user *rmtp; |
34 | #ifdef CONFIG_COMPAT | |
35 | struct compat_timespec __user *compat_rmtp; | |
36 | #endif | |
37 | u64 expires; | |
38 | } nanosleep; | |
be5dad20 TG |
39 | /* For poll */ |
40 | struct { | |
41 | struct pollfd __user *ufds; | |
42 | int nfds; | |
43 | int has_timeout; | |
44 | unsigned long tv_sec; | |
45 | unsigned long tv_nsec; | |
46 | } poll; | |
ce6bd420 | 47 | }; |
1da177e4 LT |
48 | }; |
49 | ||
50 | extern long do_no_restart_syscall(struct restart_block *parm); | |
51 | ||
52 | #include <linux/bitops.h> | |
53 | #include <asm/thread_info.h> | |
54 | ||
55 | #ifdef __KERNEL__ | |
56 | ||
2889f608 TG |
57 | #ifdef CONFIG_DEBUG_STACK_USAGE |
58 | # define THREADINFO_GFP (GFP_KERNEL | __GFP_NOTRACK | __GFP_ZERO) | |
59 | #else | |
60 | # define THREADINFO_GFP (GFP_KERNEL | __GFP_NOTRACK) | |
61 | #endif | |
62 | ||
1da177e4 LT |
63 | /* |
64 | * flag set/clear/test wrappers | |
65 | * - pass TIF_xxxx constants to these functions | |
66 | */ | |
67 | ||
1da177e4 LT |
68 | static inline void set_ti_thread_flag(struct thread_info *ti, int flag) |
69 | { | |
5548fecd | 70 | set_bit(flag, (unsigned long *)&ti->flags); |
1da177e4 LT |
71 | } |
72 | ||
73 | static inline void clear_ti_thread_flag(struct thread_info *ti, int flag) | |
74 | { | |
5548fecd | 75 | clear_bit(flag, (unsigned long *)&ti->flags); |
1da177e4 LT |
76 | } |
77 | ||
78 | static inline int test_and_set_ti_thread_flag(struct thread_info *ti, int flag) | |
79 | { | |
5548fecd | 80 | return test_and_set_bit(flag, (unsigned long *)&ti->flags); |
1da177e4 LT |
81 | } |
82 | ||
83 | static inline int test_and_clear_ti_thread_flag(struct thread_info *ti, int flag) | |
84 | { | |
5548fecd | 85 | return test_and_clear_bit(flag, (unsigned long *)&ti->flags); |
1da177e4 LT |
86 | } |
87 | ||
88 | static inline int test_ti_thread_flag(struct thread_info *ti, int flag) | |
89 | { | |
5548fecd | 90 | return test_bit(flag, (unsigned long *)&ti->flags); |
1da177e4 LT |
91 | } |
92 | ||
3b66a1ed RZ |
93 | #define set_thread_flag(flag) \ |
94 | set_ti_thread_flag(current_thread_info(), flag) | |
95 | #define clear_thread_flag(flag) \ | |
96 | clear_ti_thread_flag(current_thread_info(), flag) | |
97 | #define test_and_set_thread_flag(flag) \ | |
98 | test_and_set_ti_thread_flag(current_thread_info(), flag) | |
99 | #define test_and_clear_thread_flag(flag) \ | |
100 | test_and_clear_ti_thread_flag(current_thread_info(), flag) | |
101 | #define test_thread_flag(flag) \ | |
102 | test_ti_thread_flag(current_thread_info(), flag) | |
103 | ||
104 | #define set_need_resched() set_thread_flag(TIF_NEED_RESCHED) | |
105 | #define clear_need_resched() clear_thread_flag(TIF_NEED_RESCHED) | |
1da177e4 | 106 | |
f3de272b RM |
107 | #if defined TIF_RESTORE_SIGMASK && !defined HAVE_SET_RESTORE_SIGMASK |
108 | /* | |
109 | * An arch can define its own version of set_restore_sigmask() to get the | |
110 | * job done however works, with or without TIF_RESTORE_SIGMASK. | |
111 | */ | |
112 | #define HAVE_SET_RESTORE_SIGMASK 1 | |
113 | ||
4e4c22c7 RM |
114 | /** |
115 | * set_restore_sigmask() - make sure saved_sigmask processing gets done | |
116 | * | |
117 | * This sets TIF_RESTORE_SIGMASK and ensures that the arch signal code | |
7648d961 RM |
118 | * will run before returning to user mode, to process the flag. For |
119 | * all callers, TIF_SIGPENDING is already set or it's no harm to set | |
120 | * it. TIF_RESTORE_SIGMASK need not be in the set of bits that the | |
121 | * arch code will notice on return to user mode, in case those bits | |
122 | * are scarce. We set TIF_SIGPENDING here to ensure that the arch | |
123 | * signal code always gets run when TIF_RESTORE_SIGMASK is set. | |
4e4c22c7 RM |
124 | */ |
125 | static inline void set_restore_sigmask(void) | |
126 | { | |
127 | set_thread_flag(TIF_RESTORE_SIGMASK); | |
7648d961 | 128 | set_thread_flag(TIF_SIGPENDING); |
4e4c22c7 | 129 | } |
4ebefe3e AV |
130 | static inline void clear_restore_sigmask(void) |
131 | { | |
132 | clear_thread_flag(TIF_RESTORE_SIGMASK); | |
133 | } | |
134 | static inline bool test_restore_sigmask(void) | |
135 | { | |
136 | return test_thread_flag(TIF_RESTORE_SIGMASK); | |
137 | } | |
138 | static inline bool test_and_clear_restore_sigmask(void) | |
139 | { | |
140 | return test_and_clear_thread_flag(TIF_RESTORE_SIGMASK); | |
141 | } | |
f3de272b | 142 | #endif /* TIF_RESTORE_SIGMASK && !HAVE_SET_RESTORE_SIGMASK */ |
4e4c22c7 | 143 | |
754421c8 AV |
144 | #ifndef HAVE_SET_RESTORE_SIGMASK |
145 | #error "no set_restore_sigmask() provided and default one won't work" | |
146 | #endif | |
147 | ||
4e4c22c7 | 148 | #endif /* __KERNEL__ */ |
1da177e4 LT |
149 | |
150 | #endif /* _LINUX_THREAD_INFO_H */ |