2 * Copyright (C) 2000 Jeff Dike (jdike@karaya.com)
3 * Licensed under the GPL
6 #include "linux/config.h"
8 #include "linux/module.h"
9 #include "linux/sched.h"
10 #include "linux/init_task.h"
11 #include "linux/version.h"
12 #include "linux/mqueue.h"
13 #include "asm/uaccess.h"
14 #include "asm/pgtable.h"
15 #include "user_util.h"
18 static struct fs_struct init_fs = INIT_FS;
19 struct mm_struct init_mm = INIT_MM(init_mm);
20 static struct files_struct init_files = INIT_FILES;
21 static struct signal_struct init_signals = INIT_SIGNALS(init_signals);
23 EXPORT_SYMBOL(init_mm);
26 * Initial task structure.
28 * All other task structs will be allocated on slabs in fork.c
31 struct task_struct init_task = INIT_TASK(init_task);
33 EXPORT_SYMBOL(init_task);
36 * Initial thread structure.
38 * We need to make sure that this is 16384-byte aligned due to the
39 * way process stacks are handled. This is done by having a special
40 * "init_task" linker map entry..
43 union thread_union init_thread_union
44 __attribute__((__section__(".data.init_task"))) =
45 { INIT_THREAD_INFO(init_task) };
47 struct task_struct *alloc_task_struct(void)
49 return((struct task_struct *)
50 __get_free_pages(GFP_KERNEL, CONFIG_KERNEL_STACK_ORDER));
53 void unprotect_stack(unsigned long stack)
55 protect_memory(stack, (1 << CONFIG_KERNEL_STACK_ORDER) * PAGE_SIZE,
59 void free_task_struct(struct task_struct *task)
61 /* free_pages decrements the page counter and only actually frees
62 * the pages if they are now not accessed by anything.
64 free_pages((unsigned long) task, CONFIG_KERNEL_STACK_ORDER);
68 * Overrides for Emacs so that we follow Linus's tabbing style.
69 * Emacs will notice this stuff at the end of the file and automatically
70 * adjust the settings for this buffer only. This must remain at the end
72 * ---------------------------------------------------------------------------
74 * c-file-style: "linux"