blkcg: remove blkio_group->path[]

blkio_group->path[] stores the path of the associated cgroup and is
used only for debug messages.  Just format the path from blkg->cgroup
when printing debug messages.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

1 files changed, 6 insertions, 3 deletions

diff --git a/block/blk-throttle.c b/block/blk-throttle.c
index e2aaf27e1f10..e9b7a47f6da0 100644
--- a/block/blk-throttle.c
+++ b/block/blk-throttle.c
@@ -155,9 +155,12 @@ static inline int throtl_tg_##name(const struct throtl_grp *tg)		\
 
 THROTL_TG_FNS(on_rr);
 
-#define throtl_log_tg(td, tg, fmt, args...)                             \
-        blk_add_trace_msg((td)->queue, "throtl %s " fmt,                \
-                          blkg_path(tg_to_blkg(tg)), ##args);           \
+#define throtl_log_tg(td, tg, fmt, args...)     do {                    \
+        char __pbuf[128];                                               \
+                                                                        \
+        blkg_path(tg_to_blkg(tg), __pbuf, sizeof(__pbuf));              \
+        blk_add_trace_msg((td)->queue, "throtl %s " fmt, __pbuf, ##args); \
+} while (0)
 
 #define throtl_log(td, fmt, args...)    \
         blk_add_trace_msg((td)->queue, "throtl " fmt, ##args)