mm/vmalloc.c: emit the failure message before return

Use goto to jump to the fail label to give a failure message before
returning NULL. This makes the failure handling in this function
consistent.

Signed-off-by: Zhang Yanfei <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

mm/vmalloc.c

···
 
 	addr = __vmalloc_area_node(area, gfp_mask, prot, node, caller);
 	if (!addr)
-		return NULL;
+		goto fail;
 
 	/*
 	 * In this function, newly allocated vm_struct has VM_UNLIST flag.