commit 6c9692e2d6a2206d8fd75ea247daa47fb75e4a02
author Peter Zijlstra <peterz@infradead.org> Wed May 27 11:09:37 2015 +0930
committer Rusty Russell <rusty@rustcorp.com.au> Thu May 28 11:32:07 2015 +0930
tree 260a11511b3b629ec1cbcdeb3417e74590028e99
parent 93c2e105f6bcee231c951ba0e56e84505c4b0483

module: Make the mod_tree stuff conditional on PERF_EVENTS || TRACING

Andrew worried about the overhead on small systems; only use the fancy
code when either perf or tracing is enabled.

Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Steven Rostedt <rostedt@goodmis.org>
Requested-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

init/Kconfig

diff --git a/init/Kconfig b/init/Kconfig
index dc24dec..968a001 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -1989,6 +1989,10 @@
 
 endif # MODULES
 
+config MODULES_TREE_LOOKUP
+	def_bool y
+	depends on PERF_EVENTS || TRACING
+
 config INIT_ALL_POSSIBLE
 	bool
 	help