Re: [PATCH 5.10.y 00/15] timers: Provide timer_shutdown[_sync]()

Jeongjun Park
2026-04-23T14:07:28Z

Greg KH <gregkh@linuxfoundation.org> wrote:
> > >
> > > Ugh, I got the following build error for this series:
> > > ../drivers/misc/sgi-xp/xpc_partition.c: In function 'xpc_partition_disengaged':
> > > ../drivers/misc/sgi-xp/xpc_partition.c:294:25: error: implicit declaration of function 'del_singleshot_timer_sync' [-Werror=implicit-function-declaration]
> > > 294 | del_singleshot_timer_sync(&part->disengage_timer);
> > > | ^~~~~~~~~~~~~~~~~~~~~~~~~
> > >
> >
> > Oh dear. This issue occurred because commit 997754f114ef ("misc/sgi-xp:
> > Replace in_interrupt() usage") was merged into version 5.11-rc1 and was
> > therefore not backported to 5.10.y.
> >
> > Since this is a simple fix that only requires adding this commit to this
> > patch series, I will quickly write and send you the v2 patch.
> >
> > https://lore.kernel.org/all/20201119103151.ppo45mj53ulbxjx4@linutronix.de/
> >
> > >
> > > Don't know what happened, but I'll go and drop them all now.
> > >
> > > Do you _REALLY_ need these in the 5.10.y kernel? Who is going to use
> > > them?
> > >
> >
> > You might think it is unnecessary, but I have seen bug patches related to
> > timer_shutdown[_sync]() being backported after I backported it, and I
> > believe it is well worth backporting if this feature allows various
> > bug-fixing patches to be backported smoothly.
>
> So you don't have a specific issue you are hitting with this patch set
> that you want to have it here for? It can't be for android devices, as
> this patch series will be reverted from that tree, just like it was for
> the 5.15.y Android trees, so what systems require it?
>

I am not backporting because it is absolutely necessary for Android or a
specific system.

https://lore.kernel.org/all/20251007155808.438441-1-aha310510@gmail.com/T/#u

I simply started this in the hope that the same problem will not recur, as
I had to write a separate patch a few months ago when I backported a bug
fix patch I had written because the feature was missing.

> thanks,
>
> greg k-h

Regards,
Jeongjun Park