2 * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
3 * Licensed under the GPL
6 #ifndef __UM_THREAD_INFO_H
7 #define __UM_THREAD_INFO_H
11 #include <asm/types.h>
13 #include <asm/uaccess.h>
16 struct task_struct
*task
; /* main task structure */
17 struct exec_domain
*exec_domain
; /* execution domain */
18 unsigned long flags
; /* low level flags */
19 __u32 cpu
; /* current CPU */
20 int preempt_count
; /* 0 => preemptable,
22 mm_segment_t addr_limit
; /* thread address space:
24 0-0xFFFFFFFF for kernel */
25 struct restart_block restart_block
;
26 struct thread_info
*real_thread
; /* Points to non-IRQ stack */
29 #define INIT_THREAD_INFO(tsk) \
32 .exec_domain = &default_exec_domain, \
35 .preempt_count = INIT_PREEMPT_COUNT, \
36 .addr_limit = KERNEL_DS, \
38 .fn = do_no_restart_syscall, \
40 .real_thread = NULL, \
43 #define init_thread_info (init_thread_union.thread_info)
44 #define init_stack (init_thread_union.stack)
46 #define THREAD_SIZE ((1 << CONFIG_KERNEL_STACK_ORDER) * PAGE_SIZE)
47 /* how to get the thread information struct from C */
48 static inline struct thread_info
*current_thread_info(void)
50 struct thread_info
*ti
;
51 unsigned long mask
= THREAD_SIZE
- 1;
54 asm volatile ("" : "=r" (p
) : "0" (&ti
));
55 ti
= (struct thread_info
*) (((unsigned long)p
) & ~mask
);
59 #define THREAD_SIZE_ORDER CONFIG_KERNEL_STACK_ORDER
63 #define PREEMPT_ACTIVE 0x10000000
65 #define TIF_SYSCALL_TRACE 0 /* syscall trace active */
66 #define TIF_SIGPENDING 1 /* signal pending */
67 #define TIF_NEED_RESCHED 2 /* rescheduling necessary */
68 #define TIF_POLLING_NRFLAG 3 /* true if poll_idle() is polling
70 #define TIF_RESTART_BLOCK 4
71 #define TIF_MEMDIE 5 /* is terminating due to OOM killer */
72 #define TIF_SYSCALL_AUDIT 6
73 #define TIF_RESTORE_SIGMASK 7
74 #define TIF_NOTIFY_RESUME 8
76 #define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
77 #define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
78 #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
79 #define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG)
80 #define _TIF_MEMDIE (1 << TIF_MEMDIE)
81 #define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)