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Groups > linux.kernel > #1570867

remove the cmd_type field from struct request

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Hi Jens,

this series gets rid of the cmd_type field in struct request and
instead folds it into the REQ_OP* space.  This reduces the size of
struct request, and leads to a single op namespace that drivers
can easily switch on.  Except for the legacy ide driver which has
a mess of different request types [1] this also nicely cleans up the
code.

Note that the patches are on top of the

    "make SCSI passthrough support optional"

series I sent out on Saturday.  To make life easier I also have a git
tree available here:

	git://git.infradead.org/users/hch/block.git cmd_type

	http://git.infradead.org/users/hch/block.git/shortlog/refs/heads/cmd_type

[1] which were a pain in the ass to untangle and debug during development,
it's really time for it to die..

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remove the cmd_type field from struct request Christoph Hellwig <hch@lst.de> - 2017-01-31 17:20 +0100
  [PATCH 01/10] scm_blk: remove unneeded REQ_TYPE_FS check Christoph Hellwig <hch@lst.de> - 2017-01-31 17:30 +0100
  [PATCH 05/10] mspro_block: remove pointless prep_fn Christoph Hellwig <hch@lst.de> - 2017-01-31 17:30 +0100
  [PATCH 07/10] nbd: move request validity checking into nbd_send_cmd Christoph Hellwig <hch@lst.de> - 2017-01-31 17:30 +0100
  [PATCH 06/10] nbd: remove REQ_TYPE_DRV_PRIV leftovers Christoph Hellwig <hch@lst.de> - 2017-01-31 17:30 +0100
  [PATCH 04/10] ms_block: remove pointless prep_fn Christoph Hellwig <hch@lst.de> - 2017-01-31 17:30 +0100
  Re: remove the cmd_type field from struct request Jens Axboe <axboe@kernel.dk> - 2017-01-31 19:10 +0100
    Re: remove the cmd_type field from struct request Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> - 2017-01-31 20:00 +0100
      Re: remove the cmd_type field from struct request Jens Axboe <axboe@kernel.dk> - 2017-01-31 22:20 +0100
    Re: remove the cmd_type field from struct request James Bottomley <James.Bottomley@HansenPartnership.com> - 2017-01-31 20:00 +0100
    Re: remove the cmd_type field from struct request Hannes Reinecke <hare@suse.de> - 2017-02-01 08:00 +0100
      Re: remove the cmd_type field from struct request Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> - 2017-02-01 12:00 +0100
    Re: remove the cmd_type field from struct request Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> - 2017-02-01 11:40 +0100
  Re: remove the cmd_type field from struct request Jens Axboe <axboe@kernel.dk> - 2017-01-31 22:10 +0100
  Re: remove the cmd_type field from struct request "Martin K. Petersen" <martin.petersen@oracle.com> - 2017-02-01 04:00 +0100

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