WSL2-Linux-Kernel/drivers/block/null_blk
Christoph Hellwig 3e08773c38 block: switch polling to be bio based
Replace the blk_poll interface that requires the caller to keep a queue
and cookie from the submissions with polling based on the bio.

Polling for the bio itself leads to a few advantages:

 - the cookie construction can made entirely private in blk-mq.c
 - the caller does not need to remember the request_queue and cookie
   separately and thus sidesteps their lifetime issues
 - keeping the device and the cookie inside the bio allows to trivially
   support polling BIOs remapping by stacking drivers
 - a lot of code to propagate the cookie back up the submission path can
   be removed entirely.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Tested-by: Mark Wunderlich <mark.wunderlich@intel.com>
Link: https://lore.kernel.org/r/20211012111226.760968-15-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-10-18 06:17:36 -06:00
..
Kconfig null_blk: Move driver into its own directory 2020-12-07 17:36:04 -07:00
Makefile null_blk: Move driver into its own directory 2020-12-07 17:36:04 -07:00
main.c block: switch polling to be bio based 2021-10-18 06:17:36 -06:00
null_blk.h for-5.13/drivers-2021-04-27 2021-04-28 14:39:37 -07:00
trace.c null_blk: Move driver into its own directory 2020-12-07 17:36:04 -07:00
trace.h null_blk: Move driver into its own directory 2020-12-07 17:36:04 -07:00
zoned.c drivers/block/null_blk/main: Fix a double free in null_init. 2021-04-26 09:04:40 -06:00