oprofile: select RING_BUFFER

Impact: build fix

OProfile now depends on the ring buffer infrastructure:

 arch/x86/oprofile/built-in.o: In function `oprofile_add_ibs_sample':
 : undefined reference to `ring_buffer_unlock_commit'

Select TRACING and RING_BUFFER when oprofile is enabled.

Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 2 insertions, 0 deletions

diff --git a/arch/Kconfig b/arch/Kconfig
index 471e72dbaf8b..2e13aa261929 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -6,6 +6,8 @@ config OPROFILE
         tristate "OProfile system profiling (EXPERIMENTAL)"
         depends on PROFILING
         depends on HAVE_OPROFILE
+        select TRACING
+        select RING_BUFFER
         help
           OProfile is a profiling system capable of profiling the
           whole system, include the kernel, kernel modules, libraries,