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authorJens Axboe <axboe@suse.de>2006-07-12 14:04:37 +0200
committerJens Axboe <axboe@nelson.home.kernel.dk>2006-09-30 20:27:01 +0200
commitff7d145fd911266ae42af7552edc32681c01addb (patch)
tree03ddb7b02e6cbeeda1c0c68af5d67c907e98ad7e
parent5380a101d33d1d3a32c6b6bd2e17e5dd835842b0 (diff)
[PATCH] Add one more pointer to struct request for IO scheduler usage
Then we have enough room in the request to get rid of the dynamic allocations in CFQ/AS. Signed-off-by: Jens Axboe <axboe@suse.de>
-rw-r--r--include/linux/blkdev.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 55ef6efe3eb..d2dc17151f6 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -232,7 +232,13 @@ struct request {
struct hlist_node hash; /* merge hash */
struct rb_node rb_node; /* sort/lookup */
+ /*
+ * two pointers are available for the IO schedulers, if they need
+ * more they have to dynamically allocate it.
+ */
void *elevator_private;
+ void *elevator_private2;
+
void *completion_data;
int rq_status; /* should split this into a few status bits */