static int swsusp_alloc(void)
{
int error;
pr_debug("suspend: (pages needed: %d + %d free: %d)\n",
nr_copy_pages, PAGES_FOR_IO, nr_free_pages());
pagedir_nosave = NULL;
if (!enough_free_mem())
return -ENOMEM;
if (!enough_swap())
return -ENOSPC;
if ((error = alloc_pagedir())) {
printk(KERN_ERR "suspend: Allocating pagedir failed.\n");
return error;
}
if ((error = alloc_image_pages())) {
printk(KERN_ERR "suspend: Allocating image pages failed.\n");
swsusp_free();
return error;
}
nr_copy_pages_check = nr_copy_pages;
pagedir_order_check = pagedir_order;
return 0;
}
int pmdisk_suspend(void)
{
int error = 0;
if ((error = read_swapfiles()))
return error;
drain_local_pages();
pm_pagedir_nosave = NULL;
pr_debug("pmdisk: Counting pages to copy.\n" );
count_pages();
pr_debug("pmdisk: (pages needed: %d + %d free: %d)\n",
pmdisk_pages,PAGES_FOR_IO,nr_free_pages());
if (!enough_free_mem())
return -ENOMEM;
if (!enough_swap())
return -ENOSPC;
if ((error = alloc_pagedir())) {
pr_debug("pmdisk: Allocating pagedir failed.\n");
return error;
}
if ((error = alloc_image_pages())) {
pr_debug("pmdisk: Allocating image pages failed.\n");
free_pagedir();
return error;
}
nr_copy_pages_check = pmdisk_pages;
pagedir_order_check = pagedir_order;
/* During allocating of suspend pagedir, new cold pages may appear.
* Kill them
*/
drain_local_pages();
/* copy */
copy_pages();
/*
* End of critical section. From now on, we can write to memory,
* but we should not touch disk. This specially means we must _not_
* touch swap space! Except we must write out our image of course.
*/
pr_debug("pmdisk: %d pages copied\n", pmdisk_pages );
return 0;
}
