tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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 <linux/config.h>
12#include <asm/processor.h>
13#include <asm/types.h>
14
15struct thread_info {
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,
21 <0 => BUG */
22 mm_segment_t addr_limit; /* thread address space:
23 0-0xBFFFFFFF for user
24 0-0xFFFFFFFF for kernel */
25 struct restart_block restart_block;
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}
40
41#define init_thread_info (init_thread_union.thread_info)
42#define init_stack (init_thread_union.stack)
43
44#define THREAD_SIZE ((1 << CONFIG_KERNEL_STACK_ORDER) * PAGE_SIZE)
45/* how to get the thread information struct from C */
46static inline struct thread_info *current_thread_info(void)
47{
48 struct thread_info *ti;
49 unsigned long mask = THREAD_SIZE - 1;
50 ti = (struct thread_info *) (((unsigned long) &ti) & ~mask);
51 return ti;
52}
53
54/* thread information allocation */
55#define alloc_thread_info(tsk) \
56 ((struct thread_info *) kmalloc(THREAD_SIZE, GFP_KERNEL))
57#define free_thread_info(ti) kfree(ti)
58
59#define get_thread_info(ti) get_task_struct((ti)->task)
60#define put_thread_info(ti) put_task_struct((ti)->task)
61
62#endif
63
64#define PREEMPT_ACTIVE 0x10000000
65
66#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
67#define TIF_SIGPENDING 1 /* signal pending */
68#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
69#define TIF_POLLING_NRFLAG 3 /* true if poll_idle() is polling
70 * TIF_NEED_RESCHED
71 */
72#define TIF_RESTART_BLOCK 4
73#define TIF_MEMDIE 5
74#define TIF_SYSCALL_AUDIT 6
75
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)
82
83#endif
84
85/*
86 * Overrides for Emacs so that we follow Linus's tabbing style.
87 * Emacs will notice this stuff at the end of the file and automatically
88 * adjust the settings for this buffer only. This must remain at the end
89 * of the file.
90 * ---------------------------------------------------------------------------
91 * Local variables:
92 * c-file-style: "linux"
93 * End:
94 */