sched, x86: add HAVE_UNSTABLE_SCHED_CLOCK

add the HAVE_UNSTABLE_SCHED_CLOCK, for architectures to select.

the next change utilizes it.

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

1 files changed, 6 insertions, 0 deletions

diff --git a/init/Kconfig b/init/Kconfig
index f0e62e5ce0dc..fa42e6b549d3 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -316,6 +316,12 @@ config CPUSETS
 
           Say N if unsure.
 
+#
+# Architectures with an unreliable sched_clock() should select this:
+#
+config HAVE_UNSTABLE_SCHED_CLOCK
+        bool
+
 config GROUP_SCHED
         bool "Group CPU scheduler"
         default y