xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

blkcg: remove bio->bi_css and instead use bio->bi_blkg

Browse Source 
Prior patches ensured that any bio that interacts with a request_queue
is properly associated with a blkg. This makes bio->bi_css unnecessary
as blkg maintains a reference to blkcg already.

This removes the bio field bi_css and transfers corresponding uses to
access via bi_blkg.

Signed-off-by: Dennis Zhou <dennis@kernel.org>
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Dennis Zhou
2018-12-05 12:10:35 -05:00
committed by Jens Axboe
parent fd42df305f
commit db6638d7d1
8 changed files with 32 additions and 66 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
kernel/trace/blktrace.c
View File

@@ -764,9 +764,9 @@ blk_trace_bio_get_cgid(struct request_queue *q, struct bio *bio)
if (!bt || !(blk_tracer_flags.val & TRACE_BLK_OPT_CGROUP))
return NULL;
if (!bio->bi_css)
if (!bio->bi_blkg)
return NULL;
return cgroup_get_kernfs_id(bio->bi_css->cgroup);
return cgroup_get_kernfs_id(bio_blkcg(bio)->css.cgroup);
}
#else
static union kernfs_node_id *