linux-kernel - Re: [PATCH v2] kasan: Fix sleeping function called from invalid context on RT kernel

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Message-Id: <20220418212042.ae77c3c7ad51d95e59d6f78a@linux-foundation.org>
Date:   Mon, 18 Apr 2022 21:20:42 -0700
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     "Zhang, Qiang1" <qiang1.zhang@...el.com>
Cc:     "ryabinin.a.a@...il.com" <ryabinin.a.a@...il.com>,
        "glider@...gle.com" <glider@...gle.com>,
        "andreyknvl@...il.com" <andreyknvl@...il.com>,
        "dvyukov@...gle.com" <dvyukov@...gle.com>,
        "bigeasy@...utronix.de" <bigeasy@...utronix.de>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>
Subject: Re: [PATCH v2] kasan: Fix sleeping function called from invalid
 context on RT kernel

On Sat, 16 Apr 2022 02:47:43 +0000 "Zhang, Qiang1" <qiang1.zhang@...el.com> wrote:

> >Note that it incorporates the changes from your https://lkml.kernel.org/r/20220414025925.2423818-1-qiang1.zhang@intel.com
> >
> >btw, how are we supposed to test PREEMPT_RT builds?  I had to patch arch/Kconfig.
> 
> The attachment is a config file and I test with linux-5.17.y-rt branch (https://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git),  I have been tested.

OK, but it's a problem that we're adding CONFIG_PREEMPT_RT code to the
mainline kernel without providing for it to be at least compile-tested.

Sebastian, is there something we can do here to increase the coverage
testing?