[linux-2.6-block.git] / arch / x86 / kernel / process.c

#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/smp.h>
#include <linux/slab.h>
#include <linux/sched.h>

struct kmem_cache *task_xstate_cachep;

int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src)
{
	*dst = *src;
	if (src->thread.xstate) {
		dst->thread.xstate = kmem_cache_alloc(task_xstate_cachep,
						      GFP_KERNEL);
		if (!dst->thread.xstate)
			return -ENOMEM;
		WARN_ON((unsigned long)dst->thread.xstate & 15);
		memcpy(dst->thread.xstate, src->thread.xstate, xstate_size);
	}
	return 0;
}

void free_thread_xstate(struct task_struct *tsk)
{
	if (tsk->thread.xstate) {
		kmem_cache_free(task_xstate_cachep, tsk->thread.xstate);
		tsk->thread.xstate = NULL;
	}
}

void free_thread_info(struct thread_info *ti)
{
	free_thread_xstate(ti->task);
	free_pages((unsigned long)ti, get_order(THREAD_SIZE));
}

void arch_task_cache_init(void)
{
        task_xstate_cachep =
        	kmem_cache_create("task_xstate", xstate_size,
				  __alignof__(union thread_xstate),
				  SLAB_PANIC, NULL);
}
Commit	Line	Data
61c4628b SS	1	#include <linux/errno.h>
	2	#include <linux/kernel.h>
	3	#include <linux/mm.h>
	4	#include <linux/smp.h>
	5	#include <linux/slab.h>
	6	#include <linux/sched.h>
	7
aa283f49	8	struct kmem_cache *task_xstate_cachep;
61c4628b SS	9
	10	int arch_dup_task_struct(struct task_struct dst, struct task_struct src)
	11	{
	12	dst = src;
aa283f49 SS	13	if (src->thread.xstate) {
	14	dst->thread.xstate = kmem_cache_alloc(task_xstate_cachep,
	15	GFP_KERNEL);
	16	if (!dst->thread.xstate)
	17	return -ENOMEM;
	18	WARN_ON((unsigned long)dst->thread.xstate & 15);
	19	memcpy(dst->thread.xstate, src->thread.xstate, xstate_size);
	20	}
61c4628b SS	21	return 0;
	22	}
	23
aa283f49	24	void free_thread_xstate(struct task_struct *tsk)
61c4628b	25	{
aa283f49 SS	26	if (tsk->thread.xstate) {
	27	kmem_cache_free(task_xstate_cachep, tsk->thread.xstate);
	28	tsk->thread.xstate = NULL;
	29	}
	30	}
	31
aa283f49 SS	32	void free_thread_info(struct thread_info *ti)
	33	{
	34	free_thread_xstate(ti->task);
1679f271	35	free_pages((unsigned long)ti, get_order(THREAD_SIZE));
61c4628b SS	36	}
	37
	38	void arch_task_cache_init(void)
	39	{
	40	task_xstate_cachep =
	41	kmem_cache_create("task_xstate", xstate_size,
	42	__alignof__(union thread_xstate),
	43	SLAB_PANIC, NULL);
	44	}