oprofile: fix oprofile regression: select RING_BUFFER_ALLOW_SWAP

commit 85bac32c4a52c592b857f2c360cc5ec93a097d70
    ring-buffer: only enable ring_buffer_swap_cpu when needed
broke oprofile (at least on s390, but likely on all platforms).

this patch lets oprofile select RING_BUFER_ALLOW_SWAP to make
ring_buffer_swap_cpu usable for oprofile.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
LKML-Reference: <200909162156.49239.borntraeger@de.ibm.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Robert Richter <robert.richter@amd.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

diff --git a/arch/Kconfig b/arch/Kconfig
index beea3ccebb5e4014ea3c9556824a2d54c0423dfa..7f418bbc261a0f825ab6072f935f1f974a2f746c 100644 (file)
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -9,6 +9,7 @@ config OPROFILE
        depends on TRACING_SUPPORT
        select TRACING
        select RING_BUFFER
+       select RING_BUFFER_ALLOW_SWAP
        help
          OProfile is a profiling system capable of profiling the
          whole system, include the kernel, kernel modules, libraries,