[PATCH 1/1] eal: correct memory ordering in MCS lock

[Konstantin Ananyev]

> 
> On 11/3/25 11:07, Stephen Hemminger wrote:
> > On Mon, 3 Nov 2025 09:12:39 -0600
> > Wathsala Vithanage <wathsala.vithanage at arm.com> wrote:
> >
> >> MCS lock is broken, it's just a matter of time it will run into a deadlock.
> >>
> >> drivers/dma/cnxk is a user of MCS lock.
> > I am surprised that a driver would use mcslock.
> > MCSlock is targeted at case of large number of CPU's with lots of contention.
> > It will likely be slower than spinlock or ticketlock for the use case of driver.
> It appears in |drivers/dma/cnxk/cnxk_dmadev_fp.c|, perhaps the
> maintainer can clarify.
> 

If MCS lock is really broken, it needs to be fixed anyway.
It might be used by other third-party libs/apps that do use on DPDK.