RE: [PATCH 1/1] hexagon: Don't select GENERIC_IOMAP without HAS_IOPORT support

Brian Cain
2024-09-30T16:35:24Z

> -----Original Message-----
> From: Niklas Schnelle <schnelle@linux.ibm.com>
> Sent: Monday, September 30, 2024 10:51 AM
> To: Brian Cain <bcain@quicinc.com>
> Cc: linux-hexagon@vger.kernel.org; Arnd Bergmann <arnd@kernel.org>; Heiko
> Carstens <hca@linux.ibm.com>; linux-kernel@vger.kernel.org
> Subject: Re: [PATCH 1/1] hexagon: Don't select GENERIC_IOMAP without
> HAS_IOPORT support
>
> WARNING: This email originated from outside of Qualcomm. Please be wary of
> any links or attachments, and do not enable macros.
>
> On Wed, 2024-04-03 at 15:37 +0000, Brian Cain wrote:
> >
> > > -----Original Message-----
> > > From: Niklas Schnelle <schnelle@linux.ibm.com>
> > > Sent: Wednesday, April 3, 2024 10:22 AM
> > > To: Brian Cain <bcain@quicinc.com>
> > > Cc: linux-hexagon@vger.kernel.org; Arnd Bergmann <arnd@kernel.org>;
> > > Heiko Carstens <hca@linux.ibm.com>; linux-kernel@vger.kernel.org
> > > Subject: Re: [PATCH 1/1] hexagon: Don't select GENERIC_IOMAP without
> > > HAS_IOPORT support
> > >
> > > WARNING: This email originated from outside of Qualcomm. Please be wary
> > > of any links or attachments, and do not enable macros.
> > >
> > > On Wed, 2024-04-03 at 14:51 +0000, Brian Cain wrote:
> > > >
> > > > > -----Original Message-----
> > > > > From: Niklas Schnelle <schnelle@linux.ibm.com>
> > > > > Sent: Wednesday, April 3, 2024 8:25 AM
> > > > > To: Brian Cain <bcain@quicinc.com>
> > > > > Cc: linux-hexagon@vger.kernel.org; Arnd Bergmann <arnd@kernel.org>;
> > > > > Heiko Carstens <hca@linux.ibm.com>; linux-kernel@vger.kernel.org;
> > > Niklas
> > > > > Schnelle <schnelle@linux.ibm.com>
> > > > > Subject: [PATCH 1/1] hexagon: Don't select GENERIC_IOMAP without
> > > > > HAS_IOPORT support
> > > > >
> > > > > WARNING: This email originated from outside of Qualcomm. Please be
> > > wary
> > > > > of any links or attachments, and do not enable macros.
> > > > >
> > > > > In a future patch HAS_IOPORT=n will disable inb()/outb() and friends at
> > > > > compile time. As hexagon does not support I/O port access it also
> > > > > the GENERIC_IOMAP mechanism of dynamically choosing between I/O
> > > port
> > > > > and
> > > > > MMIO access doesn't work so don't select it.
> > > > >
> > > > > Co-developed-by: Arnd Bergmann <arnd@kernel.org>
> > > > > Signed-off-by: Arnd Bergmann <arnd@kernel.org>
> > > > > Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com>
> > > > > ---
> > > > > arch/hexagon/Kconfig | 1 -
> > > > > 1 file changed, 1 deletion(-)
> > > > >
> > > > > diff --git a/arch/hexagon/Kconfig b/arch/hexagon/Kconfig
> > > > > index e233b5efa276..5ea1bf4b7d4f 100644
> > > > > --- a/arch/hexagon/Kconfig
> > > > > +++ b/arch/hexagon/Kconfig
> > > > > @@ -31,7 +31,6 @@ config HEXAGON
> > > > > select HAVE_ARCH_TRACEHOOK
> > > > > select NEED_SG_DMA_LENGTH
> > > > > select NO_IOPORT_MAP
> > > > > - select GENERIC_IOMAP
> > > > > select GENERIC_IOREMAP
> > > > > select GENERIC_SMP_IDLE_THREAD
> > > > > select STACKTRACE_SUPPORT
> > > >
> > > > Reviewed-by: Brian Cain <bcain@quicinc.com>
> > > >
> > >
> > > Thanks for the R-b, which tree should take this? If you have other
> > > hexagon changes for v6.10 I think it would be easiest to take this
> > > together with those. As mentioned in the cover letter the per-subsystem
> >
> > I don't have other changes planned for v6.10 but I'm happy to take the
> change in my tree.
> >
> > > changes are all independent until HAS_IOPORT=n actually disables
> > > inb()/outb() which Arnd will take once all the subsystems are covered.
> > >
> > > Thanks,
> > > Niklas
>
> Hi Brian,
>
> With 2 more of my HAS_IOPORT patches having gone into v6.12-rc1 I just
> noticed that this one seems to have fallen into the cracks. This is
> probably my fault for not properly confirming that I'd be happy for you
> to take it. Do you want me to resend a new version rebased on v6.12-
> rc1?

Oh, sorry! Yes, if you could resend a rebased one I'll make sure I am able to land it.

-Brian