Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1/*
2 * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
3 * Licensed under the GPL
4 */
5
6#ifndef __UM_THREAD_INFO_H
7#define __UM_THREAD_INFO_H
8
9#ifndef __ASSEMBLY__
10
11#include <asm/processor.h>
12#include <asm/types.h>
13
14struct thread_info {
15 struct task_struct *task; /* main task structure */
16 struct exec_domain *exec_domain; /* execution domain */
17 unsigned long flags; /* low level flags */
18 __u32 cpu; /* current CPU */
19 int preempt_count; /* 0 => preemptable,
20 <0 => BUG */
21 mm_segment_t addr_limit; /* thread address space:
22 0-0xBFFFFFFF for user
23 0-0xFFFFFFFF for kernel */
24 struct restart_block restart_block;
25 struct thread_info *real_thread; /* Points to non-IRQ stack */
26};
27
28#define INIT_THREAD_INFO(tsk) \
29{ \
30 .task = &tsk, \
31 .exec_domain = &default_exec_domain, \
32 .flags = 0, \
33 .cpu = 0, \
34 .preempt_count = 1, \
35 .addr_limit = KERNEL_DS, \
36 .restart_block = { \
37 .fn = do_no_restart_syscall, \
38 }, \
39 .real_thread = NULL, \
40}
41
42#define init_thread_info (init_thread_union.thread_info)
43#define init_stack (init_thread_union.stack)
44
45#define THREAD_SIZE ((1 << CONFIG_KERNEL_STACK_ORDER) * PAGE_SIZE)
46/* how to get the thread information struct from C */
47static inline struct thread_info *current_thread_info(void)
48{
49 struct thread_info *ti;
50 unsigned long mask = THREAD_SIZE - 1;
51 ti = (struct thread_info *) (((unsigned long) &ti) & ~mask);
52 return ti;
53}
54
55/* thread information allocation */
56#define alloc_thread_info(tsk) \
57 ((struct thread_info *) kmalloc(THREAD_SIZE, GFP_KERNEL))
58#define free_thread_info(ti) kfree(ti)
59
60#endif
61
62#define PREEMPT_ACTIVE 0x10000000
63
64#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
65#define TIF_SIGPENDING 1 /* signal pending */
66#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
67#define TIF_POLLING_NRFLAG 3 /* true if poll_idle() is polling
68 * TIF_NEED_RESCHED
69 */
70#define TIF_RESTART_BLOCK 4
71#define TIF_MEMDIE 5
72#define TIF_SYSCALL_AUDIT 6
73#define TIF_RESTORE_SIGMASK 7
74
75#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
76#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
77#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
78#define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG)
79#define _TIF_MEMDIE (1 << TIF_MEMDIE)
80#define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
81#define _TIF_RESTORE_SIGMASK (1 << TIF_RESTORE_SIGMASK)
82
83#endif