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(parent: c6132da) | patch
Add chained sg support to linux/scatterlist.h
authorJens Axboe <jens.axboe@oracle.com>
Mon, 16 Jul 2007 19:17:16 +0000 (21:17 +0200)
committerJens Axboe <jens.axboe@oracle.com>
Tue, 16 Oct 2007 09:08:51 +0000 (11:08 +0200)
commit70eb8040dc81212c884a464b75e37dca8014f3ad
tree79d23b3ef2635032e6060dfa9b06e4f885a8cb10tree | snapshot
parentc6132da1704be252ee6c923f47501083d835c238commit | diff
Add chained sg support to linux/scatterlist.h

The core of the patch - allow the last sg element in a scatterlist
table to point to the start of a new table. We overload the LSB of
the page pointer to indicate whether this is a valid sg entry, or
merely a link to the next list.

Includes a fix from Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
correcting the ifdef ARCH_HAS_SG_CHAIN guarding sg_last().

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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