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>

diff --git a/arch/Kconfig b/arch/Kconfig
index 471e72d..2e13aa2 100644 (file)
--- 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,