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| author | James Bottomley <James.Bottomley@HansenPartnership.com> | 2008-01-13 14:15:28 -0600 |
|---|---|---|
| committer | Jens Axboe <jens.axboe@oracle.com> | 2008-01-28 10:54:49 +0100 |
| commit | 7cedb1f17fb7f4374d11501f61656ae9d3ba47e9 (patch) | |
| tree | d6257751445618b827c3e41e5b8fde2704c9d716 /include/linux/scatterlist.h | |
| parent | 5ed7959ede0936c55e50421a53f153b17080e876 (diff) | |
| download | lwn-7cedb1f17fb7f4374d11501f61656ae9d3ba47e9.tar.gz lwn-7cedb1f17fb7f4374d11501f61656ae9d3ba47e9.zip | |
SG: work with the SCSI fixed maximum allocations.
SCSI sg table allocation has a maximum size (of SCSI_MAX_SG_SEGMENTS,
currently 128) and this will cause a BUG_ON() in SCSI if something
tries an allocation over it. This patch adds a size limit to the
chaining allocator to allow the specification of the maximum
allocation size for chaining, so we always chain in units of the
maximum SCSI allocation size.
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'include/linux/scatterlist.h')
| -rw-r--r-- | include/linux/scatterlist.h | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/include/linux/scatterlist.h b/include/linux/scatterlist.h index e9cb103417b2..a3d567a974e8 100644 --- a/include/linux/scatterlist.h +++ b/include/linux/scatterlist.h @@ -207,9 +207,10 @@ void sg_init_one(struct scatterlist *, const void *, unsigned int); typedef struct scatterlist *(sg_alloc_fn)(unsigned int, gfp_t); typedef void (sg_free_fn)(struct scatterlist *, unsigned int); -void __sg_free_table(struct sg_table *, sg_free_fn *); +void __sg_free_table(struct sg_table *, unsigned int, sg_free_fn *); void sg_free_table(struct sg_table *); -int __sg_alloc_table(struct sg_table *, unsigned int, gfp_t, sg_alloc_fn *); +int __sg_alloc_table(struct sg_table *, unsigned int, unsigned int, gfp_t, + sg_alloc_fn *); int sg_alloc_table(struct sg_table *, unsigned int, gfp_t); /* |