lock: Add lock depth recording per CPU

We want to move to pollers being run inly when no lock is held
so let's start recording lock depth. It will also be a useful
debugging tool.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/cpu.h b/include/cpu.h
index 6112ab24..1d7c7c51 100644
--- a/include/cpu.h
+++ b/include/cpu.h
@@ -54,6 +54,7 @@ struct cpu_thread {
 	struct trace_info		*trace;
 	uint64_t			save_r1;
 	void				*icp_regs;
+	uint32_t			lock_depth;
 	uint32_t			con_suspend;
 	bool				con_need_flush;
 	bool				in_mcount;