forked from Minki/linux
7f1a00b6fc
The INIT_TASK() initializer was similarly confused about the stack vs thread_info allocation that the allocators had, and that were fixed in commitb235beea9e("Clarify naming of thread info/stack allocators"). The task ->stack pointer only incidentally ends up having the same value as the thread_info, and in fact that will change. So fix the initial task struct initializer to point to 'init_stack' instead of 'init_thread_info', and make sure the ia64 definition for that exists. This actually makes the ia64 tsk->stack pointer be sensible for the initial task, but not for any other task. As mentioned in commitb235beea9e, that whole pointer isn't actually used on ia64, since task_stack_page() there just points to the (single) allocation. All the other architectures seem to have copied the 'init_stack' definition, even if it tended to be generally unusued. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
44 lines
1.2 KiB
C
44 lines
1.2 KiB
C
/*
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* This is where we statically allocate and initialize the initial
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* task.
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*
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* Copyright (C) 1999, 2002-2003 Hewlett-Packard Co
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* David Mosberger-Tang <davidm@hpl.hp.com>
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*/
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#include <linux/init.h>
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#include <linux/mm.h>
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#include <linux/fs.h>
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#include <linux/module.h>
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#include <linux/sched.h>
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#include <linux/init_task.h>
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#include <linux/mqueue.h>
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#include <asm/uaccess.h>
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#include <asm/pgtable.h>
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static struct signal_struct init_signals = INIT_SIGNALS(init_signals);
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static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand);
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/*
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* Initial task structure.
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*
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* We need to make sure that this is properly aligned due to the way process stacks are
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* handled. This is done by having a special ".data..init_task" section...
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*/
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#define init_thread_info init_task_mem.s.thread_info
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#define init_stack init_task_mem.stack
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union {
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struct {
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struct task_struct task;
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struct thread_info thread_info;
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} s;
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unsigned long stack[KERNEL_STACK_SIZE/sizeof (unsigned long)];
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} init_task_mem asm ("init_task") __init_task_data =
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{{
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.task = INIT_TASK(init_task_mem.s.task),
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.thread_info = INIT_THREAD_INFO(init_task_mem.s.task)
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}};
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EXPORT_SYMBOL(init_task);
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