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| author |   FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> | 2008-04-29 09:54:39 +0200 |
|---|---|---|
| committer |   Jens Axboe <jens.axboe@oracle.com> | 2008-04-29 14:48:55 +0200 |
| commit | d7e3c3249ef23b4617393c69fe464765b4ff1645 (patch) | |
| tree | 3471ea20b7fb4c4a9bbd7cfb3cc952344b5501d6 /include/linux/blkdev.h | |
| parent | block: replace sizeof(rq->cmd) with BLK_MAX_CDB (diff) | |
| download | linux-dev-d7e3c3249ef23b4617393c69fe464765b4ff1645.tar.xz linux-dev-d7e3c3249ef23b4617393c69fe464765b4ff1645.zip | |
block: add large command support
This patch changes rq->cmd from the static array to a pointer to
support large commands.
We rarely handle large commands. So for optimization, a struct request
still has a static array for a command. rq_init sets rq->cmd pointer
to the static array.
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'include/linux/blkdev.h')
| -rw-r--r-- | include/linux/blkdev.h | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index d17032c347c0..08df1ea8bac4 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -215,8 +215,9 @@ struct request { /* * when request is used as a packet command carrier */ - unsigned int cmd_len; - unsigned char cmd[BLK_MAX_CDB]; + unsigned short cmd_len; + unsigned char __cmd[BLK_MAX_CDB]; + unsigned char *cmd; unsigned int data_len; unsigned int extra_len; /* length of alignment and padding */ |