Firstly, return 1 instead of 2 when 'prev -> next' dependency already
exists. Since the value 2 is not referenced anywhere, just return 1
indicating success in this case.
Secondly, return 2 instead of 1 when successfully added a lock_list
entry with saving stack_trace. With that, a caller can decide whether
to avoid redundant save_trace() on the caller site.
Signed-off-by: Byungchul Park <byungchul.park@xxxxxxx>
---
kernel/locking/lockdep.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c
index eb39474..4709110 100644
--- a/kernel/locking/lockdep.c
+++ b/kernel/locking/lockdep.c
@@ -1854,7 +1854,7 @@ static inline void inc_chains(void)
if (entry->class == hlock_class(next)) {
if (distance == 1)
entry->distance = 1;
- return 2;
+ return 1;
}
}
@@ -1894,9 +1894,10 @@ static inline void inc_chains(void)
print_lock_name(hlock_class(next));
printk(KERN_CONT "\n");
dump_stack();
- return graph_lock();
+ if (!graph_lock())
+ return 0;
}
- return 1;
+ return 2;
}
/*
--
1.9.1
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@xxxxxxxxx. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>
