Re: [3.19.y-ckt stable] Patch "MIPS: kernel: cps-vec: Replace mips32r2 ISA level with mips64r2" has been added to staging queue

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On Wed, 2015-08-05 at 15:49 -0700, Paul Burton wrote:
> On Wed, Aug 05, 2015 at 02:47:14PM -0700, Kamal Mostafa wrote:
> > This is a note to let you know that I have just added a patch titled
> >     MIPS: kernel: cps-vec: Replace mips32r2 ISA level with mips64r2
> > to the linux-3.19.y-queue 

> Hi Kamal,
> 
> This patch breaks the boot of SMP kernels on Imagination's current
> MIPS32 systems. This & the other MIPS64 related patches that were
> submitted as part of the same series do not improve things for any CPUs
> that Linux supports even as of the v4.2 cycle, so I do not believe they
> should have been marked for backport.
> 
> So please either drop this patch (& preferrably the other MIPS64 CPS SMP
> ones too)


Hi Paul-

Thanks for the heads-up!  Please confirm that these are the specific
commits to be dropped / not-applied to stable:

b677bc0 MIPS: cps-vec: Use macros for various arithmetics and memory operations
717f142 MIPS: kernel: cps-vec: Replace KSEG0 with CKSEG0
0586ac7 MIPS: kernel: cps-vec: Use ta0-ta3 pseudo-registers for 64-bit
977e043 MIPS: kernel: cps-vec: Replace mips32r2 ISA level with mips64r2
81a02e3 MIPS: kernel: cps-vec: Replace 'la' macro with PTR_LA
fd5ed30 MIPS: kernel: smp-cps: Fix 64-bit compatibility errors due to pointer casting

 -Kamal


>  or also backport the series I've just submitted:
> 
>     http://marc.info/?l=linux-mips&m=143881461431570&w=2
> 
> My preference would be for not backporting any of them.
> 
> Thanks,
>     Paul
> 
> > For more information about the 3.19.y-ckt tree, see
> > https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable
> > 
> > Thanks.
> > -Kamal
> > 
> > ------
> > 
> > From 22a7e30c46134b8c9978a237c6d143b59b66609a Mon Sep 17 00:00:00 2001
> > From: Markos Chandras <markos.chandras@xxxxxxxxxx>
> > Date: Wed, 1 Jul 2015 09:13:30 +0100
> > Subject: MIPS: kernel: cps-vec: Replace mips32r2 ISA level with mips64r2
> > 
> > commit 977e043d5ea1270ce985e4c165724ff91dc3c3e2 upstream.
> > 
> > mips32r2 is a subset of mips64r2, so we replace mips32r2 with mips64r2
> > in preparation for 64-bit CPS support.
> > 
> > Reviewed-by: Paul Burton <paul.burton@xxxxxxxxxx>
> > Signed-off-by: Markos Chandras <markos.chandras@xxxxxxxxxx>
> > Cc: linux-mips@xxxxxxxxxxxxxx
> > Patchwork: https://patchwork.linux-mips.org/patch/10588/
> > Signed-off-by: Ralf Baechle <ralf@xxxxxxxxxxxxxx>
> > Signed-off-by: Kamal Mostafa <kamal@xxxxxxxxxxxxx>
> > ---
> >  arch/mips/kernel/cps-vec.S | 4 ++--
> >  1 file changed, 2 insertions(+), 2 deletions(-)
> > 
> > diff --git a/arch/mips/kernel/cps-vec.S b/arch/mips/kernel/cps-vec.S
> > index a4b2d81..bbbd88e 100644
> > --- a/arch/mips/kernel/cps-vec.S
> > +++ b/arch/mips/kernel/cps-vec.S
> > @@ -229,7 +229,7 @@ LEAF(mips_cps_core_init)
> >  	 nop
> > 
> >  	.set	push
> > -	.set	mips32r2
> > +	.set	mips64r2
> >  	.set	mt
> > 
> >  	/* Only allow 1 TC per VPE to execute... */
> > @@ -346,7 +346,7 @@ LEAF(mips_cps_boot_vpes)
> >  	 nop
> > 
> >  	.set	push
> > -	.set	mips32r2
> > +	.set	mips64r2
> >  	.set	mt
> > 
> >  1:	/* Enter VPE configuration state */
> > --
> > 1.9.1
> > 
> 






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