Re: [BUG] cpufreq: sleeping function called from invalid context at kernel/workqueue.c:2811

From: Viresh Kumar
Date: Fri Feb 08 2013 - 00:54:58 EST

On 7 February 2013 06:11, Rafael J. Wysocki <rjw@xxxxxxx> wrote:
> From: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
> Subject: cpufreq: Move sysfs_remove_link() from under a spinlock
> Commit 73bf0fc "cpufreq: Don't remove sysfs link for policy->cpu"
> attempted to fix a bug in __cpufreq_remove_dev() by avoiding to
> remove the link to the "cpufreq" directory for policy->cpu, but it
> rearranged the code in such a way that sysfs_remove_link() ended up
> under a spinlock, which caused complaints about sleeping in atomic
> context to be emitted into the kernel log during system suspend.
> To fix this, revert commit 73bf0fc partially and move the
> sysfs_remove_link() in question to a separate block executed for
> cpus > 1 outside of the spinlock.
> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>

BTW, i have dropped this patch completely as i got another lock fixing
patch :)
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