| /* |
| * Copyright (C) 2000 Jeff Dike (jdike@karaya.com) |
| * Licensed under the GPL |
| */ |
| |
| #include "linux/config.h" |
| #include "linux/mm.h" |
| #include "linux/sched.h" |
| #include "linux/version.h" |
| #include "asm/uaccess.h" |
| #include "asm/pgtable.h" |
| #include "user_util.h" |
| #include "mem_user.h" |
| |
| static struct fs_struct init_fs = INIT_FS; |
| static struct files_struct init_files = INIT_FILES; |
| static struct signal_struct init_signals = INIT_SIGNALS; |
| struct mm_struct init_mm = INIT_MM(init_mm); |
| |
| /* |
| * Initial task structure. |
| * |
| * We need to make sure that this is 16384-byte aligned due to the |
| * way process stacks are handled. This is done by having a special |
| * "init_task" linker map entry.. |
| */ |
| |
| union task_union init_task_union |
| __attribute__((__section__(".data.init_task"))) = |
| { INIT_TASK(init_task_union.task) }; |
| |
| struct task_struct *alloc_task_struct(void) |
| { |
| return((struct task_struct *) |
| __get_free_pages(GFP_KERNEL, CONFIG_KERNEL_STACK_ORDER)); |
| } |
| |
| void unprotect_stack(unsigned long stack) |
| { |
| protect_memory(stack, (1 << CONFIG_KERNEL_STACK_ORDER) * PAGE_SIZE, |
| 1, 1, 0, 1); |
| } |
| |
| void free_task_struct(struct task_struct *task) |
| { |
| /* free_pages decrements the page counter and only actually frees |
| * the pages if they are now not accessed by anything. |
| */ |
| free_pages((unsigned long) task, CONFIG_KERNEL_STACK_ORDER); |
| } |
| |
| /* |
| * Overrides for Emacs so that we follow Linus's tabbing style. |
| * Emacs will notice this stuff at the end of the file and automatically |
| * adjust the settings for this buffer only. This must remain at the end |
| * of the file. |
| * --------------------------------------------------------------------------- |
| * Local variables: |
| * c-file-style: "linux" |
| * End: |
| */ |