linux-kernel - Re: [patch 08/39] genirq/msi: Provide msi_domain_ops::post

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Message-ID: <87leoao6r4.ffs@tglx>
Date:   Wed, 16 Nov 2022 23:48:47 +0100
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Jason Gunthorpe <jgg@...dia.com>
Cc:     LKML <linux-kernel@...r.kernel.org>, x86@...nel.org,
        Joerg Roedel <joro@...tes.org>, Will Deacon <will@...nel.org>,
        linux-pci@...r.kernel.org, Bjorn Helgaas <bhelgaas@...gle.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Marc Zyngier <maz@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Dave Jiang <dave.jiang@...el.com>,
        Alex Williamson <alex.williamson@...hat.com>,
        Kevin Tian <kevin.tian@...el.com>,
        Dan Williams <dan.j.williams@...el.com>,
        Logan Gunthorpe <logang@...tatee.com>,
        Ashok Raj <ashok.raj@...el.com>, Jon Mason <jdmason@...zu.us>,
        Allen Hubbe <allenbh@...il.com>,
        Michael Ellerman <mpe@...erman.id.au>,
        Christophe Leroy <christophe.leroy@...roup.eu>,
        linuxppc-dev@...ts.ozlabs.org,
        "Ahmed S. Darwish" <darwi@...utronix.de>,
        Reinette Chatre <reinette.chatre@...el.com>
Subject: Re: [patch 08/39] genirq/msi: Provide msi_domain_ops::post_free()

On Wed, Nov 16 2022 at 13:44, Jason Gunthorpe wrote:
> On Fri, Nov 11, 2022 at 02:54:27PM +0100, Thomas Gleixner wrote:
>> To prepare for removing the exposure of __msi_domain_free_irqs() provide a
>> post_free() callback in the MSI domain ops which can be used to solve
>> the problem of the only user of __msi_domain_free_irqs() in arch/powerpc.
>> 
>> Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
>> ---
>>  include/linux/msi.h |    4 ++++
>>  kernel/irq/msi.c    |    2 ++
>>  2 files changed, 6 insertions(+)
>
> Make sense, but I do wonder why PPC needs this ordering..

Some hypervisor thing.