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-rw-r--r--kernel/power/swsusp.c66
1 files changed, 33 insertions, 33 deletions
diff --git a/kernel/power/swsusp.c b/kernel/power/swsusp.c
index 7747a8c43e84..9a3ca659a436 100644
--- a/kernel/power/swsusp.c
+++ b/kernel/power/swsusp.c
@@ -10,12 +10,12 @@
10 * This file is released under the GPLv2. 10 * This file is released under the GPLv2.
11 * 11 *
12 * I'd like to thank the following people for their work: 12 * I'd like to thank the following people for their work:
13 * 13 *
14 * Pavel Machek <pavel@ucw.cz>: 14 * Pavel Machek <pavel@ucw.cz>:
15 * Modifications, defectiveness pointing, being with me at the very beginning, 15 * Modifications, defectiveness pointing, being with me at the very beginning,
16 * suspend to swap space, stop all tasks. Port to 2.4.18-ac and 2.5.17. 16 * suspend to swap space, stop all tasks. Port to 2.4.18-ac and 2.5.17.
17 * 17 *
18 * Steve Doddi <dirk@loth.demon.co.uk>: 18 * Steve Doddi <dirk@loth.demon.co.uk>:
19 * Support the possibility of hardware state restoring. 19 * Support the possibility of hardware state restoring.
20 * 20 *
21 * Raph <grey.havens@earthling.net>: 21 * Raph <grey.havens@earthling.net>:
@@ -84,11 +84,11 @@ extern char resume_file[];
84static unsigned int nr_copy_pages __nosavedata = 0; 84static unsigned int nr_copy_pages __nosavedata = 0;
85 85
86/* Suspend pagedir is allocated before final copy, therefore it 86/* Suspend pagedir is allocated before final copy, therefore it
87 must be freed after resume 87 must be freed after resume
88 88
89 Warning: this is evil. There are actually two pagedirs at time of 89 Warning: this is evil. There are actually two pagedirs at time of
90 resume. One is "pagedir_save", which is empty frame allocated at 90 resume. One is "pagedir_save", which is empty frame allocated at
91 time of suspend, that must be freed. Second is "pagedir_nosave", 91 time of suspend, that must be freed. Second is "pagedir_nosave",
92 allocated at time of resume, that travels through memory not to 92 allocated at time of resume, that travels through memory not to
93 collide with anything. 93 collide with anything.
94 94
@@ -132,7 +132,7 @@ static int mark_swapfiles(swp_entry_t prev)
132{ 132{
133 int error; 133 int error;
134 134
135 rw_swap_page_sync(READ, 135 rw_swap_page_sync(READ,
136 swp_entry(root_swap, 0), 136 swp_entry(root_swap, 0),
137 virt_to_page((unsigned long)&swsusp_header)); 137 virt_to_page((unsigned long)&swsusp_header));
138 if (!memcmp("SWAP-SPACE",swsusp_header.sig, 10) || 138 if (!memcmp("SWAP-SPACE",swsusp_header.sig, 10) ||
@@ -140,7 +140,7 @@ static int mark_swapfiles(swp_entry_t prev)
140 memcpy(swsusp_header.orig_sig,swsusp_header.sig, 10); 140 memcpy(swsusp_header.orig_sig,swsusp_header.sig, 10);
141 memcpy(swsusp_header.sig,SWSUSP_SIG, 10); 141 memcpy(swsusp_header.sig,SWSUSP_SIG, 10);
142 swsusp_header.swsusp_info = prev; 142 swsusp_header.swsusp_info = prev;
143 error = rw_swap_page_sync(WRITE, 143 error = rw_swap_page_sync(WRITE,
144 swp_entry(root_swap, 0), 144 swp_entry(root_swap, 0),
145 virt_to_page((unsigned long) 145 virt_to_page((unsigned long)
146 &swsusp_header)); 146 &swsusp_header));
@@ -174,22 +174,22 @@ static int is_resume_device(const struct swap_info_struct *swap_info)
174static int swsusp_swap_check(void) /* This is called before saving image */ 174static int swsusp_swap_check(void) /* This is called before saving image */
175{ 175{
176 int i, len; 176 int i, len;
177 177
178 len=strlen(resume_file); 178 len=strlen(resume_file);
179 root_swap = 0xFFFF; 179 root_swap = 0xFFFF;
180 180
181 swap_list_lock(); 181 swap_list_lock();
182 for(i=0; i<MAX_SWAPFILES; i++) { 182 for (i=0; i<MAX_SWAPFILES; i++) {
183 if (swap_info[i].flags == 0) { 183 if (swap_info[i].flags == 0) {
184 swapfile_used[i]=SWAPFILE_UNUSED; 184 swapfile_used[i]=SWAPFILE_UNUSED;
185 } else { 185 } else {
186 if(!len) { 186 if (!len) {
187 printk(KERN_WARNING "resume= option should be used to set suspend device" ); 187 printk(KERN_WARNING "resume= option should be used to set suspend device" );
188 if(root_swap == 0xFFFF) { 188 if (root_swap == 0xFFFF) {
189 swapfile_used[i] = SWAPFILE_SUSPEND; 189 swapfile_used[i] = SWAPFILE_SUSPEND;
190 root_swap = i; 190 root_swap = i;
191 } else 191 } else
192 swapfile_used[i] = SWAPFILE_IGNORED; 192 swapfile_used[i] = SWAPFILE_IGNORED;
193 } else { 193 } else {
194 /* we ignore all swap devices that are not the resume_file */ 194 /* we ignore all swap devices that are not the resume_file */
195 if (is_resume_device(&swap_info[i])) { 195 if (is_resume_device(&swap_info[i])) {
@@ -209,15 +209,15 @@ static int swsusp_swap_check(void) /* This is called before saving image */
209 * This is called after saving image so modification 209 * This is called after saving image so modification
210 * will be lost after resume... and that's what we want. 210 * will be lost after resume... and that's what we want.
211 * we make the device unusable. A new call to 211 * we make the device unusable. A new call to
212 * lock_swapdevices can unlock the devices. 212 * lock_swapdevices can unlock the devices.
213 */ 213 */
214static void lock_swapdevices(void) 214static void lock_swapdevices(void)
215{ 215{
216 int i; 216 int i;
217 217
218 swap_list_lock(); 218 swap_list_lock();
219 for(i = 0; i< MAX_SWAPFILES; i++) 219 for (i = 0; i< MAX_SWAPFILES; i++)
220 if(swapfile_used[i] == SWAPFILE_IGNORED) { 220 if (swapfile_used[i] == SWAPFILE_IGNORED) {
221 swap_info[i].flags ^= 0xFF; 221 swap_info[i].flags ^= 0xFF;
222 } 222 }
223 swap_list_unlock(); 223 swap_list_unlock();
@@ -229,7 +229,7 @@ static void lock_swapdevices(void)
229 * @loc: Place to store the entry we used. 229 * @loc: Place to store the entry we used.
230 * 230 *
231 * Allocate a new swap entry and 'sync' it. Note we discard -EIO 231 * Allocate a new swap entry and 'sync' it. Note we discard -EIO
232 * errors. That is an artifact left over from swsusp. It did not 232 * errors. That is an artifact left over from swsusp. It did not
233 * check the return of rw_swap_page_sync() at all, since most pages 233 * check the return of rw_swap_page_sync() at all, since most pages
234 * written back to swap would return -EIO. 234 * written back to swap would return -EIO.
235 * This is a partial improvement, since we will at least return other 235 * This is a partial improvement, since we will at least return other
@@ -241,7 +241,7 @@ static int write_page(unsigned long addr, swp_entry_t * loc)
241 int error = 0; 241 int error = 0;
242 242
243 entry = get_swap_page(); 243 entry = get_swap_page();
244 if (swp_offset(entry) && 244 if (swp_offset(entry) &&
245 swapfile_used[swp_type(entry)] == SWAPFILE_SUSPEND) { 245 swapfile_used[swp_type(entry)] == SWAPFILE_SUSPEND) {
246 error = rw_swap_page_sync(WRITE, entry, 246 error = rw_swap_page_sync(WRITE, entry,
247 virt_to_page(addr)); 247 virt_to_page(addr));
@@ -257,7 +257,7 @@ static int write_page(unsigned long addr, swp_entry_t * loc)
257/** 257/**
258 * data_free - Free the swap entries used by the saved image. 258 * data_free - Free the swap entries used by the saved image.
259 * 259 *
260 * Walk the list of used swap entries and free each one. 260 * Walk the list of used swap entries and free each one.
261 * This is only used for cleanup when suspend fails. 261 * This is only used for cleanup when suspend fails.
262 */ 262 */
263static void data_free(void) 263static void data_free(void)
@@ -290,7 +290,7 @@ static int data_write(void)
290 mod = 1; 290 mod = 1;
291 291
292 printk( "Writing data to swap (%d pages)... ", nr_copy_pages ); 292 printk( "Writing data to swap (%d pages)... ", nr_copy_pages );
293 for_each_pbe(p, pagedir_nosave) { 293 for_each_pbe (p, pagedir_nosave) {
294 if (!(i%mod)) 294 if (!(i%mod))
295 printk( "\b\b\b\b%3d%%", i / mod ); 295 printk( "\b\b\b\b%3d%%", i / mod );
296 if ((error = write_page(p->address, &(p->swap_address)))) 296 if ((error = write_page(p->address, &(p->swap_address))))
@@ -335,7 +335,7 @@ static int close_swap(void)
335 335
336 dump_info(); 336 dump_info();
337 error = write_page((unsigned long)&swsusp_info, &entry); 337 error = write_page((unsigned long)&swsusp_info, &entry);
338 if (!error) { 338 if (!error) {
339 printk( "S" ); 339 printk( "S" );
340 error = mark_swapfiles(entry); 340 error = mark_swapfiles(entry);
341 printk( "|\n" ); 341 printk( "|\n" );
@@ -370,7 +370,7 @@ static int write_pagedir(void)
370 struct pbe * pbe; 370 struct pbe * pbe;
371 371
372 printk( "Writing pagedir..."); 372 printk( "Writing pagedir...");
373 for_each_pb_page(pbe, pagedir_nosave) { 373 for_each_pb_page (pbe, pagedir_nosave) {
374 if ((error = write_page((unsigned long)pbe, &swsusp_info.pagedir[n++]))) 374 if ((error = write_page((unsigned long)pbe, &swsusp_info.pagedir[n++])))
375 return error; 375 return error;
376 } 376 }
@@ -472,7 +472,7 @@ static int save_highmem(void)
472 int res = 0; 472 int res = 0;
473 473
474 pr_debug("swsusp: Saving Highmem\n"); 474 pr_debug("swsusp: Saving Highmem\n");
475 for_each_zone(zone) { 475 for_each_zone (zone) {
476 if (is_highmem(zone)) 476 if (is_highmem(zone))
477 res = save_highmem_zone(zone); 477 res = save_highmem_zone(zone);
478 if (res) 478 if (res)
@@ -547,7 +547,7 @@ static void count_data_pages(void)
547 547
548 nr_copy_pages = 0; 548 nr_copy_pages = 0;
549 549
550 for_each_zone(zone) { 550 for_each_zone (zone) {
551 if (is_highmem(zone)) 551 if (is_highmem(zone))
552 continue; 552 continue;
553 mark_free_pages(zone); 553 mark_free_pages(zone);
@@ -562,9 +562,9 @@ static void copy_data_pages(void)
562 struct zone *zone; 562 struct zone *zone;
563 unsigned long zone_pfn; 563 unsigned long zone_pfn;
564 struct pbe * pbe = pagedir_nosave; 564 struct pbe * pbe = pagedir_nosave;
565 565
566 pr_debug("copy_data_pages(): pages to copy: %d\n", nr_copy_pages); 566 pr_debug("copy_data_pages(): pages to copy: %d\n", nr_copy_pages);
567 for_each_zone(zone) { 567 for_each_zone (zone) {
568 if (is_highmem(zone)) 568 if (is_highmem(zone))
569 continue; 569 continue;
570 mark_free_pages(zone); 570 mark_free_pages(zone);
@@ -702,7 +702,7 @@ static void free_image_pages(void)
702{ 702{
703 struct pbe * p; 703 struct pbe * p;
704 704
705 for_each_pbe(p, pagedir_save) { 705 for_each_pbe (p, pagedir_save) {
706 if (p->address) { 706 if (p->address) {
707 ClearPageNosave(virt_to_page(p->address)); 707 ClearPageNosave(virt_to_page(p->address));
708 free_page(p->address); 708 free_page(p->address);
@@ -719,7 +719,7 @@ static int alloc_image_pages(void)
719{ 719{
720 struct pbe * p; 720 struct pbe * p;
721 721
722 for_each_pbe(p, pagedir_save) { 722 for_each_pbe (p, pagedir_save) {
723 p->address = get_zeroed_page(GFP_ATOMIC | __GFP_COLD); 723 p->address = get_zeroed_page(GFP_ATOMIC | __GFP_COLD);
724 if (!p->address) 724 if (!p->address)
725 return -ENOMEM; 725 return -ENOMEM;
@@ -740,7 +740,7 @@ void swsusp_free(void)
740/** 740/**
741 * enough_free_mem - Make sure we enough free memory to snapshot. 741 * enough_free_mem - Make sure we enough free memory to snapshot.
742 * 742 *
743 * Returns TRUE or FALSE after checking the number of available 743 * Returns TRUE or FALSE after checking the number of available
744 * free pages. 744 * free pages.
745 */ 745 */
746 746
@@ -758,11 +758,11 @@ static int enough_free_mem(void)
758/** 758/**
759 * enough_swap - Make sure we have enough swap to save the image. 759 * enough_swap - Make sure we have enough swap to save the image.
760 * 760 *
761 * Returns TRUE or FALSE after checking the total amount of swap 761 * Returns TRUE or FALSE after checking the total amount of swap
762 * space avaiable. 762 * space avaiable.
763 * 763 *
764 * FIXME: si_swapinfo(&i) returns all swap devices information. 764 * FIXME: si_swapinfo(&i) returns all swap devices information.
765 * We should only consider resume_device. 765 * We should only consider resume_device.
766 */ 766 */
767 767
768static int enough_swap(void) 768static int enough_swap(void)
@@ -827,8 +827,8 @@ static int suspend_prepare_image(void)
827 error = swsusp_alloc(); 827 error = swsusp_alloc();
828 if (error) 828 if (error)
829 return error; 829 return error;
830 830
831 /* During allocating of suspend pagedir, new cold pages may appear. 831 /* During allocating of suspend pagedir, new cold pages may appear.
832 * Kill them. 832 * Kill them.
833 */ 833 */
834 drain_local_pages(); 834 drain_local_pages();
@@ -1030,7 +1030,7 @@ static struct pbe * swsusp_pagedir_relocate(struct pbe *pblist)
1030 1030
1031 /* Set page flags */ 1031 /* Set page flags */
1032 1032
1033 for_each_zone(zone) { 1033 for_each_zone (zone) {
1034 for (zone_pfn = 0; zone_pfn < zone->spanned_pages; ++zone_pfn) 1034 for (zone_pfn = 0; zone_pfn < zone->spanned_pages; ++zone_pfn)
1035 SetPageNosaveFree(pfn_to_page(zone_pfn + 1035 SetPageNosaveFree(pfn_to_page(zone_pfn +
1036 zone->zone_start_pfn)); 1036 zone->zone_start_pfn));