kexec: rename unusebale_pages to unusable_pages

Let's use the more common "unusable".

This patch was originally written and posted by Boris. I am including it
in this patch series.

Signed-off-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Eric Biederman <ebiederm@xmission.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Matthew Garrett <mjg59@srcf.ucam.org>
Cc: Greg Kroah-Hartman <greg@kroah.com>
Cc: Dave Young <dyoung@redhat.com>
Cc: WANG Chao <chaowang@redhat.com>
Cc: Baoquan He <bhe@redhat.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/kernel/kexec.c b/kernel/kexec.c
index 4b8f0c9..c7cc2a0 100644
--- a/kernel/kexec.c
+++ b/kernel/kexec.c
@@ -154,7 +154,7 @@
 	INIT_LIST_HEAD(&image->dest_pages);
 
 	/* Initialize the list of unusable pages */
-	INIT_LIST_HEAD(&image->unuseable_pages);
+	INIT_LIST_HEAD(&image->unusable_pages);
 
 	/* Read in the segments */
 	image->nr_segments = nr_segments;
@@ -609,7 +609,7 @@
 	kimage_free_page_list(&image->dest_pages);
 
 	/* Walk through and free any unusable pages I have cached */
-	kimage_free_page_list(&image->unuseable_pages);
+	kimage_free_page_list(&image->unusable_pages);
 
 }
 static void kimage_terminate(struct kimage *image)
@@ -732,7 +732,7 @@
 		/* If the page cannot be used file it away */
 		if (page_to_pfn(page) >
 				(KEXEC_SOURCE_MEMORY_LIMIT >> PAGE_SHIFT)) {
-			list_add(&page->lru, &image->unuseable_pages);
+			list_add(&page->lru, &image->unusable_pages);
 			continue;
 		}
 		addr = page_to_pfn(page) << PAGE_SHIFT;