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
