Re: [PATCH] cfg80211: Pass lockdep expression to RCU lists
From: Arend Van Spriel <arend.vanspriel@broadcom.com>
Date: 2020-02-19 21:27:48
Also in:
linux-kernel-mentees, linux-wireless, lkml
On 2/19/2020 10:13 AM, Johannes Berg wrote:
On Wed, 2020-02-19 at 14:41 +0530, Amol Grover wrote:quoted
- WARN_ON_ONCE(!rcu_read_lock_held() && !lockdep_rtnl_is_held()); - - list_for_each_entry_rcu(pos, &rdev->sched_scan_req_list, list) { + list_for_each_entry_rcu(pos, &rdev->sched_scan_req_list, list, + lockdep_rtnl_is_held()) {Huh, I didn't even know you _could_ do that :)
Me neither ;-). Above you are removing the WARN_ON_ONCE() entirely. Would it not be good to keep the WARN_ON_ONCE() with only the !rcu_read_lock_held() check. Regards, Arend