diff options
Diffstat (limited to 'kernel/power/swsusp.c')
| -rw-r--r-- | kernel/power/swsusp.c | 188 |
1 files changed, 0 insertions, 188 deletions
diff --git a/kernel/power/swsusp.c b/kernel/power/swsusp.c deleted file mode 100644 index 6a07f4d..0000000 --- a/kernel/power/swsusp.c +++ /dev/null @@ -1,188 +0,0 @@ -/* - * linux/kernel/power/swsusp.c - * - * This file provides code to write suspend image to swap and read it back. - * - * Copyright (C) 1998-2001 Gabor Kuti <seasons@fornax.hu> - * Copyright (C) 1998,2001-2005 Pavel Machek <pavel@suse.cz> - * - * This file is released under the GPLv2. - * - * I'd like to thank the following people for their work: - * - * Pavel Machek <pavel@ucw.cz>: - * Modifications, defectiveness pointing, being with me at the very beginning, - * suspend to swap space, stop all tasks. Port to 2.4.18-ac and 2.5.17. - * - * Steve Doddi <dirk@loth.demon.co.uk>: - * Support the possibility of hardware state restoring. - * - * Raph <grey.havens@earthling.net>: - * Support for preserving states of network devices and virtual console - * (including X and svgatextmode) - * - * Kurt Garloff <garloff@suse.de>: - * Straightened the critical function in order to prevent compilers from - * playing tricks with local variables. - * - * Andreas Mohr <a.mohr@mailto.de> - * - * Alex Badea <vampire@go.ro>: - * Fixed runaway init - * - * Rafael J. Wysocki <rjw@sisk.pl> - * Reworked the freeing of memory and the handling of swap - * - * More state savers are welcome. Especially for the scsi layer... - * - * For TODOs,FIXMEs also look in Documentation/power/swsusp.txt - */ - -#include <linux/mm.h> -#include <linux/suspend.h> -#include <linux/spinlock.h> -#include <linux/kernel.h> -#include <linux/major.h> -#include <linux/swap.h> -#include <linux/pm.h> -#include <linux/swapops.h> -#include <linux/bootmem.h> -#include <linux/syscalls.h> -#include <linux/highmem.h> -#include <linux/time.h> -#include <linux/rbtree.h> -#include <linux/io.h> - -#include "power.h" - -int in_suspend __nosavedata = 0; - -/** - * The following functions are used for tracing the allocated - * swap pages, so that they can be freed in case of an error. - */ - -struct swsusp_extent { - struct rb_node node; - unsigned long start; - unsigned long end; -}; - -static struct rb_root swsusp_extents = RB_ROOT; - -static int swsusp_extents_insert(unsigned long swap_offset) -{ - struct rb_node **new = &(swsusp_extents.rb_node); - struct rb_node *parent = NULL; - struct swsusp_extent *ext; - - /* Figure out where to put the new node */ - while (*new) { - ext = container_of(*new, struct swsusp_extent, node); - parent = *new; - if (swap_offset < ext->start) { - /* Try to merge */ - if (swap_offset == ext->start - 1) { - ext->start--; - return 0; - } - new = &((*new)->rb_left); - } else if (swap_offset > ext->end) { - /* Try to merge */ - if (swap_offset == ext->end + 1) { - ext->end++; - return 0; - } - new = &((*new)->rb_right); - } else { - /* It already is in the tree */ - return -EINVAL; - } - } - /* Add the new node and rebalance the tree. */ - ext = kzalloc(sizeof(struct swsusp_extent), GFP_KERNEL); - if (!ext) - return -ENOMEM; - - ext->start = swap_offset; - ext->end = swap_offset; - rb_link_node(&ext->node, parent, new); - rb_insert_color(&ext->node, &swsusp_extents); - return 0; -} - -/** - * alloc_swapdev_block - allocate a swap page and register that it has - * been allocated, so that it can be freed in case of an error. - */ - -sector_t alloc_swapdev_block(int swap) -{ - unsigned long offset; - - offset = swp_offset(get_swap_page_of_type(swap)); - if (offset) { - if (swsusp_extents_insert(offset)) - swap_free(swp_entry(swap, offset)); - else - return swapdev_block(swap, offset); - } - return 0; -} - -/** - * free_all_swap_pages - free swap pages allocated for saving image data. - * It also frees the extents used to register which swap entres had been - * allocated. - */ - -void free_all_swap_pages(int swap) -{ - struct rb_node *node; - - while ((node = swsusp_extents.rb_node)) { - struct swsusp_extent *ext; - unsigned long offset; - - ext = container_of(node, struct swsusp_extent, node); - rb_erase(node, &swsusp_extents); - for (offset = ext->start; offset <= ext->end; offset++) - swap_free(swp_entry(swap, offset)); - - kfree(ext); - } -} - -int swsusp_swap_in_use(void) -{ - return (swsusp_extents.rb_node != NULL); -} - -/** - * swsusp_show_speed - print the time elapsed between two events represented by - * @start and @stop - * - * @nr_pages - number of pages processed between @start and @stop - * @msg - introductory message to print - */ - -void swsusp_show_speed(struct timeval *start, struct timeval *stop, - unsigned nr_pages, char *msg) -{ - s64 elapsed_centisecs64; - int centisecs; - int k; - int kps; - - elapsed_centisecs64 = timeval_to_ns(stop) - timeval_to_ns(start); - do_div(elapsed_centisecs64, NSEC_PER_SEC / 100); - centisecs = elapsed_centisecs64; - if (centisecs == 0) - centisecs = 1; /* avoid div-by-zero */ - k = nr_pages * (PAGE_SIZE / 1024); - kps = (k * 100) / centisecs; - printk(KERN_INFO "PM: %s %d kbytes in %d.%02d seconds (%d.%02d MB/s)\n", - msg, k, - centisecs / 100, centisecs % 100, - kps / 1000, (kps % 1000) / 10); -} |
