linux-kernel - Re: [PATCH 1/2] target: drop spin_lock_assert() + irqs

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Message-ID: <20180604071605.frpptubbfxt2ngk7@linutronix.de>
Date:   Mon, 4 Jun 2018 09:16:06 +0200
From:   "bigeasy@...utronix.de" <bigeasy@...utronix.de>
To:     Bart Van Assche <Bart.VanAssche@....com>
Cc:     "daniel@...stot.me" <daniel@...stot.me>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "peterz@...radead.org" <peterz@...radead.org>,
        "rostedt@...dmis.org" <rostedt@...dmis.org>,
        "torvalds@...ux-foundation.org" <torvalds@...ux-foundation.org>,
        "nab@...ux-iscsi.org" <nab@...ux-iscsi.org>,
        "tglx@...utronix.de" <tglx@...utronix.de>,
        "acme@...nel.org" <acme@...nel.org>,
        "williams@...hat.com" <williams@...hat.com>,
        "linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
        "lclaudio@...hat.com" <lclaudio@...hat.com>,
        "target-devel@...r.kernel.org" <target-devel@...r.kernel.org>,
        "linux-rt-users@...r.kernel.org" <linux-rt-users@...r.kernel.org>
Subject: Re: [PATCH 1/2] target: drop spin_lock_assert() + irqs_disabled()
 combo checks

On 2018-06-04 07:02:15 [+0000], Bart Van Assche wrote:
> 
> Would adding WARN_ON_ONCE(!irqs_disabled()) work fine with an RT kernel?

no, because the interrupts are not disabled at this point on RT.
Lockdep works fine on RT.

> Thanks,
> 
> Bart.

Sebastian