Merge branch 'tracing/core' into tracing/hw-breakpoints

Conflicts:
	arch/Kconfig
	kernel/trace/trace.h

Merge reason: resolve the conflicts, plus adopt to the new
              ring-buffer APIs.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/arch/Kconfig b/arch/Kconfig
index 1adf2d0..c72f18f 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -116,3 +116,5 @@
 config HAVE_HW_BREAKPOINT
 	bool
 
+
+source "kernel/gcov/Kconfig"