[PATCH] tracing/sysprof: fix a build error on sysprof tracer

[Frederic Weisbecker]

Fix the following build error:

kernel/built-in.o: In function `stack_trace_reset':
trace_sysprof.c:(.text+0x3e91a): undefined reference to `tracing_stop_cmdline_record'
kernel/built-in.o: In function `stack_trace_init':
trace_sysprof.c:(.text+0x3e953): undefined reference to `tracing_start_cmdline_record'

Reported-by: Ingo Molnar <mingo@xxxxxxx>
Signed-off-by: Frederic Weisbecker <fweisbec@xxxxxxxxx>
---
 kernel/trace/Kconfig |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig
index 79be773..620f9cd 100644
--- a/kernel/trace/Kconfig
+++ b/kernel/trace/Kconfig
@@ -134,6 +134,7 @@ config SYSPROF_TRACER
 	bool "Sysprof Tracer"
 	depends on X86
 	select TRACING
+	select CONTEXT_SWITCH_TRACER
 	help
 	  This tracer provides the trace needed by the 'Sysprof' userspace
 	  tool.
-- 
1.6.1

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