From: tony@atomide.com (Tony Lindgren)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] ARM: OMAP2+: powerdomain: use raw_smp_processor_id() for trace
Date: Tue, 1 May 2018 07:50:40 -0700 [thread overview]
Message-ID: <20180501145040.GH5671@atomide.com> (raw)
In-Reply-To: <1520589020-14018-1-git-send-email-t-kristo@ti.com>
* Tero Kristo <t-kristo@ti.com> [180309 01:51]:
> smp_processor_id() checks preemption if CONFIG_DEBUG_PREEMPT is enabled,
> causing a warning dump during boot:
>
> [ 5.042377] BUG: using smp_processor_id() in preemptible [00000000] code: swapper/0/1
> [ 5.050281] caller is pwrdm_set_next_pwrst+0x48/0x88
> [ 5.055330] CPU: 1 PID: 1 Comm: swapper/0 Not tainted 4.14.24-g57341df0b4 #1
>
> Use the raw_smp_processor_id() for the trace instead, this value does
> not need to be perfectly correct. The alternative of disabling preempt
> is too heavy weight operation to be applied in PM hot path for just
> tracing purposes.
Sorry just noticed this is still pending while looking through
my inbox. Applying into omap-for-v4.17/fixes.
Regards,
Tony
prev parent reply other threads:[~2018-05-01 14:50 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-09 9:50 [PATCH] ARM: OMAP2+: powerdomain: use raw_smp_processor_id() for trace Tero Kristo
2018-05-01 14:50 ` Tony Lindgren [this message]
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