linux-kernel - Re: [PATCH 5/7] block: Remove superflous rcu_read_[un]lock_sched() in blk_queue

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Wed, 14 Mar 2018 21:08:46 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Bart Van Assche <Bart.VanAssche@....com>
Cc:     "tj@...nel.org" <tj@...nel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "jannh@...gle.com" <jannh@...gle.com>,
        "bcrl@...ck.org" <bcrl@...ck.org>,
        "torvalds@...ux-foundation.org" <torvalds@...ux-foundation.org>,
        "kernel-team@...com" <kernel-team@...com>,
        "security@...nel.org" <security@...nel.org>,
        "kent.overstreet@...il.com" <kent.overstreet@...il.com>,
        "viro@...iv.linux.org.uk" <viro@...iv.linux.org.uk>,
        "axboe@...nel.dk" <axboe@...nel.dk>,
        "paulmck@...ux.vnet.ibm.com" <paulmck@...ux.vnet.ibm.com>
Subject: Re: [PATCH 5/7] block: Remove superflous rcu_read_[un]lock_sched()
 in blk_queue_enter()

On Wed, Mar 14, 2018 at 08:05:30PM +0000, Bart Van Assche wrote:
> Can you clarify this further? From <linux/rcupdate.h>:
> 
> static inline void synchronize_rcu(void)
> {
> 	synchronize_sched();
> }

You'll find that is for !CONFIG_PREEMPT_RCU.