lock: Add additional lock auditing code

Keep track of lock owner name and replace lock_depth counter
with a per-cpu list of locks held by the cpu.

This allows us to print the actual locks held in case we hit
the (in)famous message about opal_pollers being run with a
lock held.

It also allows us to warn (and drop them) if locks are still
held when returning to the OS or completing a scheduled job.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
[stewart: fix unit tests]
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/core/stack.c b/core/stack.c
index bb7fa62..af4d37d 100644
--- a/core/stack.c
+++ b/core/stack.c
@@ -21,6 +21,7 @@
 #include <stack.h>
 #include <mem_region.h>
 #include <unistd.h>
+#include <lock.h>
 
 #define STACK_BUF_ENTRIES	60
 static struct bt_entry bt_buf[STACK_BUF_ENTRIES];