mm: don't include <linux/blk-cgroup.h> in <linux/writeback.h>
blk-cgroup.h pulls in blkdev.h and thus pretty much all the block
headers. Break this dependency chain by turning wbc_blkcg_css into a
macro and dropping the blk-cgroup.h include.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Link: https://lore.kernel.org/r/20210920123328.1399408-2-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/lib/random32.c b/lib/random32.c
index 4d0e05e4..a57a0e1 100644
--- a/lib/random32.c
+++ b/lib/random32.c
@@ -39,6 +39,7 @@
#include <linux/random.h>
#include <linux/sched.h>
#include <linux/bitops.h>
+#include <linux/slab.h>
#include <asm/unaligned.h>
#include <trace/events/random.h>
