Re: [PATCH v12 1/3] mm, powerpc, x86: define VM_PKEY_BITx bits if CONFIG_ARCH_HAS_PKEYS is enabled

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On Sun, Feb 25, 2018 at 05:27:11PM +0530, Aneesh Kumar K.V wrote:
> 
> 
> On 02/24/2018 06:35 AM, Ram Pai wrote:
> >On Fri, Feb 23, 2018 at 03:11:45PM +0800, kbuild test robot wrote:
> >>Hi Ram,
> >>
> >>Thank you for the patch! Yet something to improve:
> >>
> >>[auto build test ERROR on linus/master]
> >>[also build test ERROR on v4.16-rc2 next-20180222]
> >>[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
> >>
> >>         chmod +x ~/bin/make.cross
> >...snip..
> >>         # save the attached .config to linux build tree
> >>         make.cross ARCH=powerpc
> >>
> >>Note: the linux-review/Ram-Pai/mm-x86-powerpc-Enhancements-to-Memory-Protection-Keys/20180223-042743 HEAD c5692bca45543c242ffca15c811923e4c548ed19 builds fine.
> >>       It only hurts bisectibility.
> >
> >oops, it broke git-bisect on powerpc :-(
> >The following change will fix it. This should nail it down.
> >
> >diff --git a/arch/powerpc/include/asm/pkeys.h
> >b/arch/powerpc/include/asm/pkeys.h
> >index 0409c80..0b3b669 100644
> >--- a/arch/powerpc/include/asm/pkeys.h
> >+++ b/arch/powerpc/include/asm/pkeys.h
> >@@ -25,6 +25,7 @@
> >  # define VM_PKEY_BIT1  VM_HIGH_ARCH_1
> >  # define VM_PKEY_BIT2  VM_HIGH_ARCH_2
> >  # define VM_PKEY_BIT3  VM_HIGH_ARCH_3
> >  # define VM_PKEY_BIT4  VM_HIGH_ARCH_4
> >+#elif !defined(VM_PKEY_BIT4)
> >+# define VM_PKEY_BIT4  VM_HIGH_ARCH_4
> >#endif
> >
> 
> Why don't you remove this powerpc definition completely in this
> patch? 

That was my thought too, but refrained from sneaking in the changes into
the patch, to maintain the integrity of all the reviewed-by.

Was planning on sending a seperate patch to remove the
powerpc definition entirely.

RP




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