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| author | Jens Axboe <jens.axboe@oracle.com> | 2007-11-15 09:13:11 +0100 |
|---|---|---|
| committer | Jens Axboe <jens.axboe@oracle.com> | 2008-01-28 10:05:27 +0100 |
| commit | 5ed7959ede0936c55e50421a53f153b17080e876 (patch) | |
| tree | 52fae9cd4959b7855e37c5dc4d0ce7eb22656cdb /include/scsi/scsi_cmnd.h | |
| parent | 0db9299f48ebd4a860d6ad4e1d36ac50671d48e7 (diff) | |
| download | linux-5ed7959ede0936c55e50421a53f153b17080e876.tar.bz2 | |
SG: Convert SCSI to use scatterlist helpers for sg chaining
Also change scsi_alloc_sgtable() to just return 0/failure, since it
maps to the command passed in. ->request_buffer is now no longer needed,
once drivers are adapted to use scsi_sglist() it can be killed.
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'include/scsi/scsi_cmnd.h')
| -rw-r--r-- | include/scsi/scsi_cmnd.h | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/include/scsi/scsi_cmnd.h b/include/scsi/scsi_cmnd.h index abd7479ff452..a457fca66f61 100644 --- a/include/scsi/scsi_cmnd.h +++ b/include/scsi/scsi_cmnd.h @@ -8,7 +8,6 @@ #include <linux/scatterlist.h> struct request; -struct scatterlist; struct Scsi_Host; struct scsi_device; @@ -68,8 +67,8 @@ struct scsi_cmnd { void *request_buffer; /* Actual requested buffer */ /* These elements define the operation we ultimately want to perform */ + struct sg_table sg_table; unsigned short use_sg; /* Number of pieces of scatter-gather */ - unsigned short __use_sg; unsigned underflow; /* Return error if less than this amount is transferred */ @@ -128,14 +127,14 @@ extern void *scsi_kmap_atomic_sg(struct scatterlist *sg, int sg_count, size_t *offset, size_t *len); extern void scsi_kunmap_atomic_sg(void *virt); -extern struct scatterlist *scsi_alloc_sgtable(struct scsi_cmnd *, gfp_t); +extern int scsi_alloc_sgtable(struct scsi_cmnd *, gfp_t); extern void scsi_free_sgtable(struct scsi_cmnd *); extern int scsi_dma_map(struct scsi_cmnd *cmd); extern void scsi_dma_unmap(struct scsi_cmnd *cmd); #define scsi_sg_count(cmd) ((cmd)->use_sg) -#define scsi_sglist(cmd) ((struct scatterlist *)(cmd)->request_buffer) +#define scsi_sglist(cmd) ((cmd)->sg_table.sgl) #define scsi_bufflen(cmd) ((cmd)->request_bufflen) static inline void scsi_set_resid(struct scsi_cmnd *cmd, int resid) |