* Ask help about killing irqchip.irq_print_chip on PPC platforms
[not found] <54991DE5.5090805@linux.intel.com>
@ 2014-12-23 7:56 ` Jiang Liu
0 siblings, 0 replies; 4+ messages in thread
From: Jiang Liu @ 2014-12-23 7:56 UTC (permalink / raw)
To: Tudor Laurentiu, Thomas Gleixner, Scott Wood
Cc: linuxppc-dev, Linux Kernel Mailing List
Hi Scott and Tudor,
Sorry, resend and Ccing the list.
We are trying to clean up some irqchip interfaces, and
irqchip.irq_print_chip is a candidate for removal. After some
changes on x86 side, arch/powerpc/sysdev/fsl_msi.c may be the
last user of irqchip.irq_print_chip. So could you please help
to advice on whether we could kill irqchip.irq_print_chip
by using "fsl-msi" instead of "fsl-msi-%d" for irqchip name?
Will it break any userspace interfaces?
Thanks!
Gerry
^ permalink raw reply [flat|nested] 4+ messages in thread
* Ask help about killing irqchip.irq_print_chip on PPC platforms
@ 2014-12-23 7:56 ` Jiang Liu
0 siblings, 0 replies; 4+ messages in thread
From: Jiang Liu @ 2014-12-23 7:56 UTC (permalink / raw)
To: Tudor Laurentiu, Thomas Gleixner, Scott Wood
Cc: Linux Kernel Mailing List, linuxppc-dev
Hi Scott and Tudor,
Sorry, resend and Ccing the list.
We are trying to clean up some irqchip interfaces, and
irqchip.irq_print_chip is a candidate for removal. After some
changes on x86 side, arch/powerpc/sysdev/fsl_msi.c may be the
last user of irqchip.irq_print_chip. So could you please help
to advice on whether we could kill irqchip.irq_print_chip
by using "fsl-msi" instead of "fsl-msi-%d" for irqchip name?
Will it break any userspace interfaces?
Thanks!
Gerry
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Ask help about killing irqchip.irq_print_chip on PPC platforms
2014-12-23 7:56 ` Jiang Liu
@ 2014-12-23 7:58 ` Scott Wood
-1 siblings, 0 replies; 4+ messages in thread
From: Scott Wood @ 2014-12-23 7:58 UTC (permalink / raw)
To: Jiang Liu
Cc: Tudor Laurentiu, Thomas Gleixner, linuxppc-dev,
Linux Kernel Mailing List
On Tue, 2014-12-23 at 15:56 +0800, Jiang Liu wrote:
> Hi Scott and Tudor,
> Sorry, resend and Ccing the list.
Resending reply...
> We are trying to clean up some irqchip interfaces, and
> irqchip.irq_print_chip is a candidate for removal. After some
> changes on x86 side, arch/powerpc/sysdev/fsl_msi.c may be the
> last user of irqchip.irq_print_chip. So could you please help
> to advice on whether we could kill irqchip.irq_print_chip
> by using "fsl-msi" instead of "fsl-msi-%d" for irqchip name?
> Will it break any userspace interfaces?
> Thanks!
> Gerry
fsl-msi-%d was introduced to allow userspace to identify the cascade
interrupt belonging to a particular MSI, for the purpose of setting
affinity, as this cannot be done on the MSI itself due to hardware
limitations.
Removing it would not exactly eliminate a lot of code or complexity...
-Scott
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Ask help about killing irqchip.irq_print_chip on PPC platforms
@ 2014-12-23 7:58 ` Scott Wood
0 siblings, 0 replies; 4+ messages in thread
From: Scott Wood @ 2014-12-23 7:58 UTC (permalink / raw)
To: Jiang Liu
Cc: Tudor Laurentiu, Thomas Gleixner, Linux Kernel Mailing List,
linuxppc-dev
On Tue, 2014-12-23 at 15:56 +0800, Jiang Liu wrote:
> Hi Scott and Tudor,
> Sorry, resend and Ccing the list.
Resending reply...
> We are trying to clean up some irqchip interfaces, and
> irqchip.irq_print_chip is a candidate for removal. After some
> changes on x86 side, arch/powerpc/sysdev/fsl_msi.c may be the
> last user of irqchip.irq_print_chip. So could you please help
> to advice on whether we could kill irqchip.irq_print_chip
> by using "fsl-msi" instead of "fsl-msi-%d" for irqchip name?
> Will it break any userspace interfaces?
> Thanks!
> Gerry
fsl-msi-%d was introduced to allow userspace to identify the cascade
interrupt belonging to a particular MSI, for the purpose of setting
affinity, as this cannot be done on the MSI itself due to hardware
limitations.
Removing it would not exactly eliminate a lot of code or complexity...
-Scott
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2014-12-23 7:59 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz follow: Atom feed
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[not found] <54991DE5.5090805@linux.intel.com>
2014-12-23 7:56 ` Ask help about killing irqchip.irq_print_chip on PPC platforms Jiang Liu
2014-12-23 7:56 ` Jiang Liu
2014-12-23 7:58 ` Scott Wood
2014-12-23 7:58 ` Scott Wood
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