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

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On 7/20/23 00:03, Daniel Golle wrote:
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 {
Please reverse this flag. Most of the devices will not have an NVMEM partition, and we shouldn't require each and every driver to tag their devices. So please use GENHD_FL_NVMEM and only set this flag on devices which really have an NVMEM partition.



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