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authorJosh Triplett <josh@joshtriplett.org>2012-09-02 19:45:14 -0700
committerSteven Rostedt <rostedt@goodmis.org>2012-09-13 22:52:08 -0400
commitea632e9f12033346cc68247faa3b924d54936b8b (patch)
treeb87fe48b7127a8d890ba7073fd460a1c99b0c831 /kernel/trace
parent76bab1b78ab6f25d5f74165f94526c25fc93d984 (diff)
trace: Stop compiling in trace_clock unconditionally
Commit 56449f437 "tracing: make the trace clocks available generally", in April 2009, made trace_clock available unconditionally, since CONFIG_X86_DS used it too. Commit faa4602e47 "x86, perf, bts, mm: Delete the never used BTS-ptrace code", in March 2010, removed CONFIG_X86_DS, and now only CONFIG_RING_BUFFER (split out from CONFIG_TRACING for general use) has a dependency on trace_clock. So, only compile in trace_clock with CONFIG_RING_BUFFER or CONFIG_TRACING enabled. Link: http://lkml.kernel.org/r/20120903024513.GA19583@leaf Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Josh Triplett <josh@joshtriplett.org> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'kernel/trace')
-rw-r--r--kernel/trace/Kconfig5
-rw-r--r--kernel/trace/Makefile6
2 files changed, 6 insertions, 5 deletions
diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig
index 9301a0e35e0..4cea4f41c1d 100644
--- a/kernel/trace/Kconfig
+++ b/kernel/trace/Kconfig
@@ -62,8 +62,12 @@ config HAVE_C_RECORDMCOUNT
config TRACER_MAX_TRACE
bool
+config TRACE_CLOCK
+ bool
+
config RING_BUFFER
bool
+ select TRACE_CLOCK
config FTRACE_NMI_ENTER
bool
@@ -114,6 +118,7 @@ config TRACING
select NOP_TRACER
select BINARY_PRINTF
select EVENT_TRACING
+ select TRACE_CLOCK
config GENERIC_TRACER
bool
diff --git a/kernel/trace/Makefile b/kernel/trace/Makefile
index 837090808aa..d7e2068e4b7 100644
--- a/kernel/trace/Makefile
+++ b/kernel/trace/Makefile
@@ -19,11 +19,7 @@ endif
CFLAGS_trace_events_filter.o := -I$(src)
-#
-# Make the trace clocks available generally: it's infrastructure
-# relied on by ptrace for example:
-#
-obj-y += trace_clock.o
+obj-$(CONFIG_TRACE_CLOCK) += trace_clock.o
obj-$(CONFIG_FUNCTION_TRACER) += libftrace.o
obj-$(CONFIG_RING_BUFFER) += ring_buffer.o