linux-kernel - Re: [PATCH] checkpatch: Add warnings for use of mdelay()

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Message-ID: <20180705081953.pmvpmtzm273eb6yk@mwanda>
Date:   Thu, 5 Jul 2018 11:19:53 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     Joe Perches <joe@...ches.com>
Cc:     Prakruthi Deepak Heragu <pheragu@...eaurora.org>,
        apw@...onical.com, Julia Lawall <julia.lawall@...6.fr>,
        Dan Carpenter <error27@...il.com>,
        linux-kernel@...r.kernel.org, ckadabi@...eaurora.org,
        tsoni@...eaurora.org, bryanh@...eaurora.org,
        Israel Schlesinger <israels@...eaurora.org>,
        Stepan Moskovchenko <stepanm@...eaurora.org>
Subject: Re: [PATCH] checkpatch: Add warnings for use of mdelay()

Neither Smatch nor Coccinelle do a good job tracking when you're in
atomic context.  I've wanted to add this to Smatch but even then it
would be to warn that "We're holding a spinlock so we can't sleep".
It's trickier to say for sure when you're not holding a lock...

regards,
dan carpenter