[PATCH v2 0/3] add error handle for bdi debugfs register

[weiping zhang <zhangweiping@didichuxing.com>]

Hello,

Change since V1:
 * remove the patch for bdi_debug_init(), because patch1 add a check
   for bdi_debug_root
 * remove bdi_put in bdi_register, this functions has two callers:
caller1: mtd_bdi_init->bdi_register, bdi_put if register fail
caller2: device_add_disk->bdi_register_owner->bdi_register, this call
stack need more safety cleanup, so patch3 add an WARN_ON.

weiping zhang (3):
  bdi: convert bdi_debug_register to int
  bdi: add error handle for bdi_debug_register
  block: add WARN_ON if bdi register fail

 block/genhd.c    |  2 +-
 mm/backing-dev.c | 22 +++++++++++++++++++---
 2 files changed, 20 insertions(+), 4 deletions(-)

-- 
2.14.2

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