[PATCH] swsusp: remove copy_pagedir

It can be replaced by a simple memcpy.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

kernel/power/pmdisk.c

@@ -732,19 +732,6 @@ int pmdisk_resume(void)
 
 /* More restore stuff */
 
-/* FIXME: Why not memcpy(to, from, 1<<pagedir_order*PAGE_SIZE)? */
-static void __init copy_pagedir(suspend_pagedir_t *to, suspend_pagedir_t *from)
-{
-	int i;
-	char *topointer=(char *)to, *frompointer=(char *)from;
-
-	for(i=0; i < 1 << pagedir_order; i++) {
-		copy_page(topointer, frompointer);
-		topointer += PAGE_SIZE;
-		frompointer += PAGE_SIZE;
-	}
-}
-
 #define does_collide(addr) does_collide_order(pm_pagedir_nosave, addr, 0)
 
 /*
@@ -792,7 +779,7 @@ static int __init relocate_pagedir(void)
 	 * We have to avoid recursion (not to overflow kernel stack),
 	 * and that's why code looks pretty cryptic 
 	 */
-	suspend_pagedir_t *new_pagedir, *old_pagedir = pm_pagedir_nosave;
+	suspend_pagedir_t *old_pagedir = pm_pagedir_nosave;
 	void **eaten_memory = NULL;
 	void **c = eaten_memory, *m, *f;
 	int err;
@@ -808,8 +795,9 @@ static int __init relocate_pagedir(void)
 	while ((m = (void *) __get_free_pages(GFP_ATOMIC, pagedir_order))) {
 		if (!does_collide_order(old_pagedir, (unsigned long)m,
 					pagedir_order)) {
-			pm_pagedir_nosave = new_pagedir = m;
-			copy_pagedir(new_pagedir, old_pagedir);
+			pm_pagedir_nosave =
+				memcpy(m, old_pagedir,
+				       PAGE_SIZE << pagedir_order);
 			err = 0;
 			break;
 		}

kernel/power/swsusp.c

@@ -863,19 +863,6 @@ int software_suspend(void)
 
 /* More restore stuff */
 
-/* FIXME: Why not memcpy(to, from, 1<<pagedir_order*PAGE_SIZE)? */
-static void copy_pagedir(suspend_pagedir_t *to, suspend_pagedir_t *from)
-{
-	int i;
-	char *topointer=(char *)to, *frompointer=(char *)from;
-
-	for(i=0; i < 1 << pagedir_order; i++) {
-		copy_page(topointer, frompointer);
-		topointer += PAGE_SIZE;
-		frompointer += PAGE_SIZE;
-	}
-}
-
 #define does_collide(addr) does_collide_order(pagedir_nosave, addr, 0)
 
 /*
@@ -923,7 +910,7 @@ static int relocate_pagedir(void)
 	 * We have to avoid recursion (not to overflow kernel stack),
 	 * and that's why code looks pretty cryptic 
 	 */
-	suspend_pagedir_t *new_pagedir, *old_pagedir = pagedir_nosave;
+	suspend_pagedir_t *old_pagedir = pagedir_nosave;
 	void **eaten_memory = NULL;
 	void **c = eaten_memory, *m, *f;
 	int ret = 0;
@@ -948,8 +935,8 @@ static int relocate_pagedir(void)
 		printk("out of memory\n");
 		ret = -ENOMEM;
 	} else {
-		pagedir_nosave = new_pagedir = m;
-		copy_pagedir(new_pagedir, old_pagedir);
+		pagedir_nosave =
+			memcpy(m, old_pagedir, PAGE_SIZE << pagedir_order);
 	}
 
 	c = eaten_memory;