[PATCH 0/2] UBI: fix ubi.mtd MODULE_PARM_DESC issues and add per-device wear-leveling threshold

[Ran Hongyun]

This series adds a per-device wear-leveling threshold for UBI devices,
with a preparatory fix to the MODULE_PARM_DESC.

Patch 1 fixes two pre-existing issues in the ubi.mtd MODULE_PARM_DESC:
the parameter format string was missing the enable_fm and need_resv_pool
tokens, and the bad-block reservation note was misplaced after Example 5
instead of after Example 3.

Patch 2 extends struct ubi_attach_req with a __s32 wl_threshold field, 
plumbs it through the ioctl and module parameter paths, and replaces 
the compile-time macros UBI_WL_THRESHOLD and WL_FREE_MAX_DIFF with p
er-device fields across wl.c and fastmap-wl.c. 0 means "use the kernel 
default", the accepted range is 2-65536.

Ran Hongyun (2):
  UBI: fix two issues in the ubi.mtd MODULE_PARM_DESC
  UBI: support per-device wear-leveling threshold

 drivers/mtd/ubi/build.c      | 43 ++++++++++++++++++++++++++++++------
 drivers/mtd/ubi/cdev.c       |  2 +-
 drivers/mtd/ubi/fastmap-wl.c |  8 +++----
 drivers/mtd/ubi/ubi.h        | 21 +++++++++++++++++-
 drivers/mtd/ubi/wl.c         | 39 ++++++++------------------------
 include/uapi/mtd/ubi-user.h  | 10 ++++++++-
 6 files changed, 79 insertions(+), 44 deletions(-)

-- 
2.52.0