SUNRPC: Ensure that we can trace waitqueues when !defined(CONFIG_SYSCTL)
The tracepoint code relies on the queue->name being defined in order to
be able to display the name of the waitqueue on which an RPC task is
sleeping.
Reported-by: Randy Dunlap <rdunlap@xenotime.net>
Reported-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Acked-by: Randy Dunlap <rdunlap@xenotime.net>
diff --git a/include/linux/sunrpc/debug.h b/include/linux/sunrpc/debug.h
index c2786f2..2a11eb2 100644
--- a/include/linux/sunrpc/debug.h
+++ b/include/linux/sunrpc/debug.h
@@ -34,6 +34,9 @@
#ifdef CONFIG_SYSCTL
#define RPC_DEBUG
#endif
+#ifdef CONFIG_TRACEPOINTS
+#define RPC_TRACEPOINTS
+#endif
/* #define RPC_PROFILE */
/*
diff --git a/include/linux/sunrpc/sched.h b/include/linux/sunrpc/sched.h
index f7b2df5..22dfc24 100644
--- a/include/linux/sunrpc/sched.h
+++ b/include/linux/sunrpc/sched.h
@@ -195,7 +195,7 @@
unsigned char nr; /* # tasks remaining for cookie */
unsigned short qlen; /* total # tasks waiting in queue */
struct rpc_timer timer_list;
-#ifdef RPC_DEBUG
+#if defined(RPC_DEBUG) || defined(RPC_TRACEPOINTS)
const char * name;
#endif
};
@@ -270,11 +270,22 @@
return (task->tk_priority + RPC_PRIORITY_LOW == prio);
}
-#ifdef RPC_DEBUG
+#if defined(RPC_DEBUG) || defined (RPC_TRACEPOINTS)
static inline const char * rpc_qname(const struct rpc_wait_queue *q)
{
return ((q && q->name) ? q->name : "unknown");
}
+
+static inline void rpc_assign_waitqueue_name(struct rpc_wait_queue *q,
+ const char *name)
+{
+ q->name = name;
+}
+#else
+static inline void rpc_assign_waitqueue_name(struct rpc_wait_queue *q,
+ const char *name)
+{
+}
#endif
#endif /* _LINUX_SUNRPC_SCHED_H_ */
diff --git a/net/sunrpc/sched.c b/net/sunrpc/sched.c
index d79c63d..1c570a8 100644
--- a/net/sunrpc/sched.c
+++ b/net/sunrpc/sched.c
@@ -208,9 +208,7 @@
queue->qlen = 0;
setup_timer(&queue->timer_list.timer, __rpc_queue_timer_fn, (unsigned long)queue);
INIT_LIST_HEAD(&queue->timer_list.list);
-#ifdef RPC_DEBUG
- queue->name = qname;
-#endif
+ rpc_assign_waitqueue_name(queue, qname);
}
void rpc_init_priority_wait_queue(struct rpc_wait_queue *queue, const char *qname)