summaryrefslogtreecommitdiff
path: root/include
diff options
context:
space:
mode:
authorChristoph Hellwig <hch@lst.de>2020-05-04 14:47:56 +0200
committerJens Axboe <axboe@kernel.dk>2020-05-09 16:07:57 -0600
commit6bd87eec23cbc9ed222bed0f5b5b02bf300e9a8d (patch)
tree27ebe54b5fbc4083760df21ddd65d6d3ecc17dbd /include
parentd51cfc53ade3189455a1b88ec7a2ff0c24597cf8 (diff)
bdi: add a ->dev_name field to struct backing_dev_info
Cache a copy of the name for the life time of the backing_dev_info structure so that we can reference it even after unregistering. Fixes: 68f23b89067f ("memcg: fix a crash in wb_workfn when a device disappears") Reported-by: Yufen Yu <yuyufen@huawei.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Jan Kara <jack@suse.cz> Reviewed-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'include')
-rw-r--r--include/linux/backing-dev-defs.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/backing-dev-defs.h b/include/linux/backing-dev-defs.h
index ee577a83cfe6..7367150f962a 100644
--- a/include/linux/backing-dev-defs.h
+++ b/include/linux/backing-dev-defs.h
@@ -219,6 +219,7 @@ struct backing_dev_info {
wait_queue_head_t wb_waitq;
struct device *dev;
+ char dev_name[64];
struct device *owner;
struct timer_list laptop_mode_wb_timer;