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, 2 insertions, 1 deletions

diff --git a/coverity-model.c b/coverity-model.c
index b11f3bff..ca237514 100644
--- a/coverity-model.c
+++ b/coverity-model.c
@@ -10,7 +10,8 @@ void mem_free(struct mem_region *region, void *mem, const char *location) {
 	__coverity_free__(mem);
 }
 
-void lock(struct lock *l) {
+void lock_caller(struct lock *l, const char *caller)
+{
 	__coverity_exclusive_lock_acquire__(l);
 }