1 /* thread_info.h: common low-level thread information accessors
3 * Copyright (C) 2002 David Howells (dhowells@redhat.com)
4 * - Incorporating suggestions made by Linus Torvalds
7 #ifndef _LINUX_THREAD_INFO_H
8 #define _LINUX_THREAD_INFO_H
10 #include <linux/types.h>
13 struct compat_timespec;
16 * System call restart block.
18 struct restart_block {
19 long (*fn)(struct restart_block *);
21 /* For futex_wait and futex_wait_requeue_pi */
33 struct timespec __user *rmtp;
35 struct compat_timespec __user *compat_rmtp;
41 struct pollfd __user *ufds;
45 unsigned long tv_nsec;
50 extern long do_no_restart_syscall(struct restart_block *parm);
52 #include <linux/bitops.h>
53 #include <asm/thread_info.h>
57 #ifdef CONFIG_DEBUG_STACK_USAGE
58 # define THREADINFO_GFP (GFP_KERNEL | __GFP_NOTRACK | __GFP_ZERO)
60 # define THREADINFO_GFP (GFP_KERNEL | __GFP_NOTRACK)
64 * flag set/clear/test wrappers
65 * - pass TIF_xxxx constants to these functions
68 static inline void set_ti_thread_flag(struct thread_info *ti, int flag)
70 set_bit(flag, (unsigned long *)&ti->flags);
73 static inline void clear_ti_thread_flag(struct thread_info *ti, int flag)
75 clear_bit(flag, (unsigned long *)&ti->flags);
78 static inline int test_and_set_ti_thread_flag(struct thread_info *ti, int flag)
80 return test_and_set_bit(flag, (unsigned long *)&ti->flags);
83 static inline int test_and_clear_ti_thread_flag(struct thread_info *ti, int flag)
85 return test_and_clear_bit(flag, (unsigned long *)&ti->flags);
88 static inline int test_ti_thread_flag(struct thread_info *ti, int flag)
90 return test_bit(flag, (unsigned long *)&ti->flags);
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)
104 #define set_need_resched() set_thread_flag(TIF_NEED_RESCHED)
105 #define clear_need_resched() clear_thread_flag(TIF_NEED_RESCHED)
107 #if defined TIF_RESTORE_SIGMASK && !defined HAVE_SET_RESTORE_SIGMASK
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.
112 #define HAVE_SET_RESTORE_SIGMASK 1
115 * set_restore_sigmask() - make sure saved_sigmask processing gets done
117 * This sets TIF_RESTORE_SIGMASK and ensures that the arch signal code
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.
125 static inline void set_restore_sigmask(void)
127 set_thread_flag(TIF_RESTORE_SIGMASK);
128 set_thread_flag(TIF_SIGPENDING);
130 #endif /* TIF_RESTORE_SIGMASK && !HAVE_SET_RESTORE_SIGMASK */
132 #endif /* __KERNEL__ */
134 #endif /* _LINUX_THREAD_INFO_H */