[RFC PATCH 3/6] block: add new genhd flag GENHD_FL_NO_NVMEM

[Daniel Golle]

Add new flag to destinguish block devices which should not act as an
NVMEM provider, such as for example an emulated block device on top of
an MTD partition which already acts as an NVMEM provider itself.

Signed-off-by: Daniel Golle <daniel@xxxxxxxxxxxxxx>
---
 include/linux/blkdev.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 2f5371b8482c0..e853d1815be15 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -80,11 +80,14 @@ struct partition_meta_info {
  * ``GENHD_FL_NO_PART``: partition support is disabled.  The kernel will not
  * scan for partitions from add_disk, and users can't add partitions manually.
  *
+ * ``GENHD_FL_NO_NVMEM``: NVMEM emulation is disabled.  The kernel will not
+ * emulate an NVMEM device on top of this disk.
  */
 enum {
 	GENHD_FL_REMOVABLE			= 1 << 0,
 	GENHD_FL_HIDDEN				= 1 << 1,
 	GENHD_FL_NO_PART			= 1 << 2,
+	GENHD_FL_NO_NVMEM			= 1 << 3,
 };
 
 enum {
-- 
2.41.0