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git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blob - include/linux/thread_info.h
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>
11 #include <linux/bug.h>
12 #include <linux/restart_block.h>
14 #ifdef CONFIG_THREAD_INFO_IN_TASK
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.
20 #include <asm/current.h>
21 #define current_thread_info() ((struct thread_info *)current)
24 #include <linux/bitops.h>
25 #include <asm/thread_info.h>
29 #ifdef CONFIG_DEBUG_STACK_USAGE
30 # define THREADINFO_GFP (GFP_KERNEL_ACCOUNT | __GFP_NOTRACK | \
33 # define THREADINFO_GFP (GFP_KERNEL_ACCOUNT | __GFP_NOTRACK)
37 * flag set/clear/test wrappers
38 * - pass TIF_xxxx constants to these functions
41 static inline void set_ti_thread_flag(struct thread_info
*ti
, int flag
)
43 set_bit(flag
, (unsigned long *)&ti
->flags
);
46 static inline void clear_ti_thread_flag(struct thread_info
*ti
, int flag
)
48 clear_bit(flag
, (unsigned long *)&ti
->flags
);
51 static inline int test_and_set_ti_thread_flag(struct thread_info
*ti
, int flag
)
53 return test_and_set_bit(flag
, (unsigned long *)&ti
->flags
);
56 static inline int test_and_clear_ti_thread_flag(struct thread_info
*ti
, int flag
)
58 return test_and_clear_bit(flag
, (unsigned long *)&ti
->flags
);
61 static inline int test_ti_thread_flag(struct thread_info
*ti
, int flag
)
63 return test_bit(flag
, (unsigned long *)&ti
->flags
);
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)
77 #define tif_need_resched() test_thread_flag(TIF_NEED_RESCHED)
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
)
88 #ifdef CONFIG_HARDENED_USERCOPY
89 extern void __check_object_size(const void *ptr
, unsigned long n
,
92 static __always_inline
void check_object_size(const void *ptr
, unsigned long n
,
95 if (!__builtin_constant_p(n
))
96 __check_object_size(ptr
, n
, to_user
);
99 static inline void check_object_size(const void *ptr
, unsigned long n
,
102 #endif /* CONFIG_HARDENED_USERCOPY */
104 #endif /* __KERNEL__ */
106 #endif /* _LINUX_THREAD_INFO_H */