linux-kernel - Re: [PATCH 12/17] workqueue: Implement disable/enable for (delayed) work items

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Date: Mon, 26 Feb 2024 08:30:40 -1000
From: Tejun Heo <tj@...nel.org>
To: Boqun Feng <boqun.feng@...il.com>
Cc: jiangshanlai@...il.com, torvalds@...ux-foundation.org,
	linux-kernel@...r.kernel.org, allen.lkml@...il.com,
	kernel-team@...a.com
Subject: Re: [PATCH 12/17] workqueue: Implement disable/enable for (delayed)
 work items

Hello,

On Sun, Feb 25, 2024 at 07:42:27PM -0800, Boqun Feng wrote:
> > +bool enable_work(struct work_struct *work)
> > +{
> > +	struct work_offq_data offqd;
> > +	unsigned long irq_flags;
> > +
> > +	work_grab_pending(work, 0, &irq_flags);
> > +
> > +	work_offqd_unpack(&offqd, *work_data_bits(work));
> > +	work_offqd_enable(&offqd);
> > +	set_work_pool_and_clear_pending(work, offqd.pool_id,
> > +					work_offqd_pack_flags(&offqd));
> > +	local_irq_enable();
> 
> Maybe
> 	local_irq_restore(irq_flags);
> 
> ?
> 
> Because in a later patch, you make this funciton callable in any
> context, so it may be called with irq disabled.

Yeah, Lai already pointed that out. Will send out an updated patchset later.

Thanks.

-- 
tejun