[PATCH] swsusp: rework swsusp_suspend

This patch makes only the functions in swsusp.c call functions in snapshot.c
and not both ways.   It also moves the check for available swap out of
swsusp_suspend() which is necessary for separating the swap-handling functions
in swsusp from the core code.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 2 insertions, 17 deletions

diff --git a/kernel/power/snapshot.c b/kernel/power/snapshot.c
index b8a2e9a63206..4a6dbcefd378 100644
--- a/kernel/power/snapshot.c
+++ b/kernel/power/snapshot.c
@@ -88,8 +88,7 @@ static int save_highmem_zone(struct zone *zone)
         return 0;
 }
 
-
-static int save_highmem(void)
+int save_highmem(void)
 {
         struct zone *zone;
         int res = 0;
@@ -120,11 +119,7 @@ int restore_highmem(void)
         }
         return 0;
 }
-#else
-static int save_highmem(void) { return 0; }
-int restore_highmem(void) { return 0; }
-#endif /* CONFIG_HIGHMEM */
-
+#endif
 
 static int pfn_is_nosave(unsigned long pfn)
 {
@@ -416,11 +411,6 @@ asmlinkage int swsusp_save(void)
         unsigned int nr_pages;
 
         pr_debug("swsusp: critical section: \n");
-        if (save_highmem()) {
-                printk(KERN_CRIT "swsusp: Not enough free pages for highmem\n");
-                restore_highmem();
-                return -ENOMEM;
-        }
 
         drain_local_pages();
         nr_pages = count_data_pages();
@@ -440,11 +430,6 @@ asmlinkage int swsusp_save(void)
                 return -ENOMEM;
         }
 
-        if (!enough_swap(nr_pages)) {
-                printk(KERN_ERR "swsusp: Not enough free swap\n");
-                return -ENOSPC;
-        }
-
         pagedir_nosave = swsusp_alloc(nr_pages);
         if (!pagedir_nosave)
                 return -ENOMEM;