linux-kernel - Re: [PATCH] Reset task stack state in bringup

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Message-ID: <11A8071B-D9FC-418A-B0B5-D2AE608F740A@sipsolutions.net>
Date:   Sat, 11 Mar 2023 21:29:06 +0100
From:   Johannes Berg <johannes@...solutions.net>
To:     David Woodhouse <dwmw2@...radead.org>, mark.rutland@....com,
        Richard Weinberger <richard@....at>,
        Anton Ivanov <anton.ivanov@...bridgegreys.com>,
        linux-um@...ts.infradead.org
CC:     catalin.marinas@....com, dvyukov@...gle.com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        peterz@...radead.org, quic_qiancai@...cinc.com,
        valentin.schneider@....com, will@...nel.org, woodylin@...gle.com
Subject: Re: [PATCH] Reset task stack state in bringup_cpu()




>Hm, in the !CONFIG_GENERIC_SMP_IDLE_THREAD case, idle_thread_get() will
>have returned NULL. Won't these then crash?
>
>Admittedly that seems to be *only* for UM, as all other architectures
>with SMP seem to set CONFIG_GENERIC_SMP_IDLE_THREAD.

UM doesn't even have SMP, so maybe CONFIG_GENERIC_SMP_IDLE_THREAD can just be removed?

johannes 
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