Fix warnings with !CONFIG_BLOCK
Hide everything in blkdev.h with CONFIG_BLOCK isn't set, and fixup
the (few) files that fail to build because they were relying on blkdev.h
pulling in extra includes for them.
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/mm/readahead.c b/mm/readahead.c
index 39bf45d..be20c9d 100644
--- a/mm/readahead.c
+++ b/mm/readahead.c
@@ -15,6 +15,7 @@
#include <linux/backing-dev.h>
#include <linux/task_io_accounting_ops.h>
#include <linux/pagevec.h>
+#include <linux/pagemap.h>
void default_unplug_io_fn(struct backing_dev_info *bdi, struct page *page)
{