From: Peter Zijlstra <peterz@infradead.org>
To: Joel Fernandes <joel@joelfernandes.org>
Cc: linux-kernel@vger.kernel.org,
Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>,
Bjorn Helgaas <bhelgaas@google.com>,
Borislav Petkov <bp@alien8.de>,
c0d1n61at3@gmail.com, "David S. Miller" <davem@davemloft.net>,
edumazet@google.com,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>,
"H. Peter Anvin" <hpa@zytor.com>, Ingo Molnar <mingo@redhat.com>,
Josh Triplett <josh@joshtriplett.org>,
keescook@chromium.org, kernel-hardening@lists.openwall.com,
Lai Jiangshan <jiangshanlai@gmail.com>,
Len Brown <lenb@kernel.org>,
linux-acpi@vger.kernel.org, linux-pci@vger.kernel.org,
linux-pm@vger.kernel.org,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
neilb@suse.com, netdev@vger.kernel.org, oleg@redhat.com,
"Paul E. McKenney" <paulmck@linux.ibm.com>,
Pavel Machek <pavel@ucw.cz>,
"Rafael J. Wysocki" <rjw@rjwysocki.net>,
Rasmus Villemoes <rasmus.villemoes@prevas.dk>,
rcu@vger.kernel.org, Steven Rostedt <rostedt@goodmis.org>,
Tejun Heo <tj@kernel.org>, Thomas Gleixner <tglx@linutronix.de>,
will@kernel.org,
"maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)"
<x86@kernel.org>
Subject: Re: [PATCH v1 1/6] rcu: Add support for consolidated-RCU reader checking
Date: Fri, 12 Jul 2019 17:58:59 +0200 [thread overview]
Message-ID: <20190712155859.GV3419@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <20190712151051.GB235410@google.com>
On Fri, Jul 12, 2019 at 11:10:51AM -0400, Joel Fernandes wrote:
> Agreed, I will do it this way (without the debug_locks) like:
>
> ---8<-----------------------
>
> diff --git a/kernel/rcu/update.c b/kernel/rcu/update.c
> index ba861d1716d3..339aebc330db 100644
> --- a/kernel/rcu/update.c
> +++ b/kernel/rcu/update.c
> @@ -296,27 +296,15 @@ EXPORT_SYMBOL_GPL(rcu_read_lock_bh_held);
>
> int rcu_read_lock_any_held(void)
> {
> if (!debug_lockdep_rcu_enabled())
> return 1;
> if (!rcu_is_watching())
> return 0;
> if (!rcu_lockdep_current_cpu_online())
> return 0;
> + if (lock_is_held(&rcu_lock_map) || lock_is_held(&rcu_sched_lock_map))
> + return 1;
> + return !preemptible();
> }
> EXPORT_SYMBOL_GPL(rcu_read_lock_any_held);
OK, that looks sane. Thanks!
next prev parent reply other threads:[~2019-07-12 16:00 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-11 23:43 [PATCH v1 0/6] Harden list_for_each_entry_rcu() and family Joel Fernandes (Google)
2019-07-11 23:43 ` [PATCH v1 1/6] rcu: Add support for consolidated-RCU reader checking Joel Fernandes (Google)
2019-07-12 4:49 ` Joel Fernandes
2019-07-12 11:01 ` Peter Zijlstra
2019-07-12 14:49 ` Joel Fernandes
2019-07-12 11:11 ` Peter Zijlstra
2019-07-12 15:10 ` Joel Fernandes
2019-07-12 15:58 ` Peter Zijlstra [this message]
2019-07-12 16:45 ` Paul E. McKenney
2019-07-12 17:06 ` Joel Fernandes
2019-07-12 17:46 ` Paul E. McKenney
2019-07-12 19:40 ` Joel Fernandes
2019-07-12 23:27 ` Paul E. McKenney
2019-07-12 12:12 ` Oleg Nesterov
2019-07-12 13:56 ` Joel Fernandes
2019-07-11 23:43 ` [PATCH v1 2/6] ipv4: add lockdep condition to fix for_each_entry Joel Fernandes (Google)
2019-07-11 23:43 ` [PATCH v1 3/6] driver/core: Convert to use built-in RCU list checking Joel Fernandes (Google)
2019-07-12 5:19 ` Greg Kroah-Hartman
2019-07-11 23:43 ` [PATCH v1 4/6] workqueue: Convert for_each_wq to use built-in list check Joel Fernandes (Google)
2019-07-11 23:44 ` [PATCH v1 5/6] x86/pci: Pass lockdep condition to pcm_mmcfg_list iterator Joel Fernandes (Google)
2019-07-11 23:44 ` [PATCH v1 6/6] acpi: Use built-in RCU list checking for acpi_ioremaps list Joel Fernandes (Google)
2019-07-11 23:52 ` [PATCH v1 0/6] Harden list_for_each_entry_rcu() and family Joel Fernandes
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20190712155859.GV3419@hirez.programming.kicks-ass.net \
--to=peterz@infradead.org \
--cc=bhelgaas@google.com \
--cc=bp@alien8.de \
--cc=c0d1n61at3@gmail.com \
--cc=davem@davemloft.net \
--cc=edumazet@google.com \
--cc=gregkh@linuxfoundation.org \
--cc=hpa@zytor.com \
--cc=jiangshanlai@gmail.com \
--cc=joel@joelfernandes.org \
--cc=josh@joshtriplett.org \
--cc=keescook@chromium.org \
--cc=kernel-hardening@lists.openwall.com \
--cc=kuznet@ms2.inr.ac.ru \
--cc=lenb@kernel.org \
--cc=linux-acpi@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-pci@vger.kernel.org \
--cc=linux-pm@vger.kernel.org \
--cc=mathieu.desnoyers@efficios.com \
--cc=mingo@redhat.com \
--cc=neilb@suse.com \
--cc=netdev@vger.kernel.org \
--cc=oleg@redhat.com \
--cc=paulmck@linux.ibm.com \
--cc=pavel@ucw.cz \
--cc=rasmus.villemoes@prevas.dk \
--cc=rcu@vger.kernel.org \
--cc=rjw@rjwysocki.net \
--cc=rostedt@goodmis.org \
--cc=tglx@linutronix.de \
--cc=tj@kernel.org \
--cc=will@kernel.org \
--cc=x86@kernel.org \
--cc=yoshfuji@linux-ipv6.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).