[PATCH net-next 1/2] devlink: fix build error for CONFIG_MODULES=n

[Arnd Bergmann]

A driver calling trace_devlink_hwmsg cannot be built when modules are disabled:

include/trace/events/devlink.h: In function 
'trace_event_get_offsets_devlink_hwmsg':
include/trace/events/devlink.h:25:51: error: dereferencing pointer to 
incomplete type 'struct module'
   __string(owner_name, devlink->dev->driver->owner->name)

This changes the code to only print the module name when modules are actually
enabled, otherwise we hardcode the string "built-in".

Signed-off-by: Arnd Bergmann <a...@arndb.de>
Fixes: e5224f0fe2ac ("devlink: add hardware messages tracing facility")
---
 include/trace/events/devlink.h | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/include/trace/events/devlink.h b/include/trace/events/devlink.h
index 333c32ac9bfa..26f92d3c7e9c 100644
--- a/include/trace/events/devlink.h
+++ b/include/trace/events/devlink.h
@@ -22,7 +22,11 @@ TRACE_EVENT(devlink_hwmsg,
        TP_STRUCT__entry(
                __string(bus_name, devlink->dev->bus->name)
                __string(dev_name, dev_name(devlink->dev))
+#ifdef CONFIG_MODULES
                __string(owner_name, devlink->dev->driver->owner->name)
+#else
+               __string(owner_name, "built-in")
+#endif
                __field(bool, incoming)
                __field(unsigned long, type)
                __dynamic_array(u8, buf, len)
@@ -32,7 +36,11 @@ TRACE_EVENT(devlink_hwmsg,
        TP_fast_assign(
                __assign_str(bus_name, devlink->dev->bus->name);
                __assign_str(dev_name, dev_name(devlink->dev));
+#ifdef CONFIG_MODULES
                __assign_str(owner_name, devlink->dev->driver->owner->name);
+#else
+               __assign_str(owner_name, "built-in");
+#endif
                __entry->incoming = incoming;
                __entry->type = type;
                memcpy(__get_dynamic_array(buf), buf, len);
-- 
2.9.0