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authorChristoph Hellwig <hch@lst.de>2022-04-20 06:27:16 +0200
committerJens Axboe <axboe@kernel.dk>2022-05-02 14:06:20 -0600
commitf4a6a61cb6d40d9ae63e47743d33200f3efe3fe7 (patch)
treeddf10830cb8afd7241a592f5aff2ecbc26cf330a /include/linux/blktrace_api.h
parentdec223c92a4688f6c9642d640cfe15a99d289dd4 (diff)
blktrace: cleanup the __trace_note_message interface
Pass the cgroup_subsys_state instead of a the blkg so that blktrace doesn't need to poke into blk-cgroup internals, and give the name a blk prefix as the current name is way too generic for a public interface. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Tejun Heo <tj@kernel.org> Link: https://lore.kernel.org/r/20220420042723.1010598-9-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'include/linux/blktrace_api.h')
-rw-r--r--include/linux/blktrace_api.h10
1 files changed, 4 insertions, 6 deletions
diff --git a/include/linux/blktrace_api.h b/include/linux/blktrace_api.h
index 22501a293fa5..623e22492afa 100644
--- a/include/linux/blktrace_api.h
+++ b/include/linux/blktrace_api.h
@@ -27,12 +27,10 @@ struct blk_trace {
atomic_t dropped;
};
-struct blkcg;
-
extern int blk_trace_ioctl(struct block_device *, unsigned, char __user *);
extern void blk_trace_shutdown(struct request_queue *);
-extern __printf(3, 4)
-void __trace_note_message(struct blk_trace *, struct blkcg *blkcg, const char *fmt, ...);
+__printf(3, 4) void __blk_trace_note_message(struct blk_trace *bt,
+ struct cgroup_subsys_state *css, const char *fmt, ...);
/**
* blk_add_trace_msg - Add a (simple) message to the blktrace stream
@@ -47,14 +45,14 @@ void __trace_note_message(struct blk_trace *, struct blkcg *blkcg, const char *f
* NOTE: Can not use 'static inline' due to presence of var args...
*
**/
-#define blk_add_cgroup_trace_msg(q, cg, fmt, ...) \
+#define blk_add_cgroup_trace_msg(q, css, fmt, ...) \
do { \
struct blk_trace *bt; \
\
rcu_read_lock(); \
bt = rcu_dereference((q)->blk_trace); \
if (unlikely(bt)) \
- __trace_note_message(bt, cg, fmt, ##__VA_ARGS__);\
+ __blk_trace_note_message(bt, css, fmt, ##__VA_ARGS__);\
rcu_read_unlock(); \
} while (0)
#define blk_add_trace_msg(q, fmt, ...) \