lightnvm: control life of nvm_dev in driver

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LightNVM compatible device drivers does not have a method to expose
LightNVM specific sysfs entries.

To enable LightNVM sysfs entries to be exposed, lightnvm device
drivers require a struct device to attach it to. To allow both the
actual device driver and lightnvm sysfs entries to coexist, the device
driver tracks the lifetime of the nvm_dev structure.

This patch refactors NVMe and null_blk to handle the lifetime of struct
nvm_dev, which eliminates the need for struct gendisk when a lightnvm
compatible device is provided.

Signed-off-by: Matias Bjørling <m@bjorling.me>
Signed-off-by: Jens Axboe <axboe@fb.com>

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This commit is contained in:

Matias Bjørling 2016-09-16 14:25:07 +02:00 • committed by Jens Axboe

parent b21d5b3017

commit b0b4e09c1a

6 changed files with 83 additions and 68 deletions

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15

include/linux/lightnvm.h

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