Commit e204193b authored by Xiu Jianfeng's avatar Xiu Jianfeng Committed by Peter Zijlstra
Browse files

lockdep: Use memset_startat() helper in reinit_class() 



use memset_startat() helper to simplify the code, there is no functional
change in this patch.

Signed-off-by: default avatarXiu Jianfeng <xiujianfeng@huawei.com>
Signed-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20211213132618.105737-1-xiujianfeng@huawei.com
parent 54dff232

kernel/locking/lockdep.c

+1 −4
Original line number Diff line number Diff line
@@ -6011,13 +6011,10 @@ static void zap_class(struct pending_free *pf, struct lock_class *class) 


static void reinit_class(struct lock_class *class)

{

	void *const p = class;

	const unsigned int offset = offsetof(struct lock_class, key);



	WARN_ON_ONCE(!class->lock_entry.next);

	WARN_ON_ONCE(!list_empty(&class->locks_after));

	WARN_ON_ONCE(!list_empty(&class->locks_before));

	memset(p + offset, 0, sizeof(*class) - offset);

	memset_startat(class, 0, key);

	WARN_ON_ONCE(!class->lock_entry.next);

	WARN_ON_ONCE(!list_empty(&class->locks_after));

	WARN_ON_ONCE(!list_empty(&class->locks_before));