Re: linux-next: manual merge of the arm64 tree with the asm-generic tree

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On Mon, 12 Oct 2020 at 13:33, Arnd Bergmann <arnd@xxxxxxxx> wrote:
>
> On Mon, Oct 12, 2020 at 12:52 AM Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx> wrote:
> >
> > Hi all,
> >
> > Today's linux-next merge of the arm64 tree got a conflict in:
> >
> >   arch/arm64/include/asm/mmu_context.h
> >
> > between commit:
> >
> >   f911c2a7c096 ("arm64: use asm-generic/mmu_context.h for no-op implementations")
> >
> > from the asm-generic tree and commit:
> >
> >   48118151d8cc ("arm64: mm: Pin down ASIDs for sharing mm with devices")
> >
> > from the arm64 tree.
> >
> > I fixed it up (see below) and can carry the fix as necessary. This
> > is now fixed as far as linux-next is concerned, but any non trivial
> > conflicts should be mentioned to your upstream maintainer when your tree
> > is submitted for merging.  You may also want to consider cooperating
> > with the maintainer of the conflicting tree to minimise any particularly
> > complex conflicts.
> >
>
> Sorry about that, I had pushed my asm-generic branch to the correct
> location on Friday after I noticed it was missing. Removed it again now
> until the end up the merge window.


arm64 build failed on today's tag 20201012.


make -sk KBUILD_BUILD_USER=TuxBuild -C/linux -j16 ARCH=arm64
CROSS_COMPILE=aarch64-linux-gnu- HOSTCC=gcc CC="sccache
aarch64-linux-gnu-gcc" O=build Image
#
In file included from ../arch/arm64/include/asm/mmu_context.h:257,
                 from ../arch/arm64/include/asm/efi.h:10,
                 from ../arch/arm64/xen/../../arm/xen/enlighten.c:19:
../include/asm-generic/mmu_context.h:34:19: error: redefinition of
‘init_new_context’
   34 | static inline int init_new_context(struct task_struct *tsk,
      |                   ^~~~~~~~~~~~~~~~
In file included from ../arch/arm64/include/asm/efi.h:10,
                 from ../arch/arm64/xen/../../arm/xen/enlighten.c:19:
../arch/arm64/include/asm/mmu_context.h:180:1: note: previous
definition of ‘init_new_context’ was here
  180 | init_new_context(struct task_struct *tsk, struct mm_struct *mm)
      | ^~~~~~~~~~~~~~~~
make[3]: *** [../scripts/Makefile.build:283:
arch/arm64/xen/../../arm/xen/enlighten.o] Error 1
In file included from ../arch/arm64/include/asm/mmu_context.h:257,
                 from ../include/linux/mmu_context.h:5,
                 from ../kernel/sched/sched.h:54,
                 from ../kernel/sched/core.c:13:
../include/asm-generic/mmu_context.h:34:19: error: redefinition of
‘init_new_context’
   34 | static inline int init_new_context(struct task_struct *tsk,
      |                   ^~~~~~~~~~~~~~~~
In file included from ../include/linux/mmu_context.h:5,
                 from ../kernel/sched/sched.h:54,
                 from ../kernel/sched/core.c:13:
../arch/arm64/include/asm/mmu_context.h:180:1: note: previous
definition of ‘init_new_context’ was here
  180 | init_new_context(struct task_struct *tsk, struct mm_struct *mm)
      | ^~~~~~~~~~~~~~~~

Reported-by: Naresh Kamboju <naresh.kamboju@xxxxxxxxxx>

ref:
https://gitlab.com/Linaro/lkft/mirrors/next/linux-next/-/jobs/785569731

>
>        Arnd


- Naresh




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