linux-kernel - Re: linux-next: manual merge of the powerpc tree with the kbuild tree

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Message-ID: <20241125103217.56a6eb0e@canb.auug.org.au>
Date: Mon, 25 Nov 2024 10:32:17 +1100
From: Stephen Rothwell <sfr@...b.auug.org.au>
To: Masahiro Yamada <masahiroy@...nel.org>
Cc: Michael Ellerman <mpe@...erman.id.au>, PowerPC
 <linuxppc-dev@...ts.ozlabs.org>, Linux Kernel Mailing List
 <linux-kernel@...r.kernel.org>, Linux Next Mailing List
 <linux-next@...r.kernel.org>, Nathan Chancellor <nathan@...nel.org>
Subject: Re: linux-next: manual merge of the powerpc tree with the kbuild
 tree

Hi all,

On Wed, 13 Nov 2024 09:52:28 +1100 Stephen Rothwell <sfr@...b.auug.org.au> wrote:
>
> Today's linux-next merge of the powerpc tree got a conflict in:
> 
>   arch/powerpc/Makefile
> 
> between commit:
> 
>   de51342c5157 ("kbuild: add $(objtree)/ prefix to some in-kernel build artifacts")
> 
> from the kbuild tree and commit:
> 
>   bee08a9e6ab0 ("powerpc: Adjust adding stack protector flags to KBUILD_CLAGS for clang")
> 
> from the powerpc 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.
> 
> 
> diff --cc arch/powerpc/Makefile
> index 321b596d2550,99af7953e844..000000000000
> --- a/arch/powerpc/Makefile
> +++ b/arch/powerpc/Makefile
> @@@ -402,9 -403,11 +403,11 @@@ prepare: stack_protector_prepar
>   PHONY += stack_protector_prepare
>   stack_protector_prepare: prepare0
>   ifdef CONFIG_PPC64
> - 	$(eval KBUILD_CFLAGS += -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "PACA_CANARY") print $$3;}' $(objtree)/include/generated/asm-offsets.h))
> + 	$(eval KBUILD_CFLAGS += -mstack-protector-guard=tls -mstack-protector-guard-reg=r13 \
>  -				-mstack-protector-guard-offset=$(shell awk '{if ($$2 == "PACA_CANARY") print $$3;}' include/generated/asm-offsets.h))
> ++				-mstack-protector-guard-offset=$(shell awk '{if ($$2 == "PACA_CANARY") print $$3;}' $(objtree)/include/generated/asm-offsets.h))
>   else
> - 	$(eval KBUILD_CFLAGS += -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "TASK_CANARY") print $$3;}' $(objtree)/include/generated/asm-offsets.h))
> + 	$(eval KBUILD_CFLAGS += -mstack-protector-guard=tls -mstack-protector-guard-reg=r2 \
>  -				-mstack-protector-guard-offset=$(shell awk '{if ($$2 == "TASK_CANARY") print $$3;}' include/generated/asm-offsets.h))
> ++				-mstack-protector-guard-offset=$(shell awk '{if ($$2 == "TASK_CANARY") print $$3;}' $(objtree)/include/generated/asm-offsets.h))
>   endif
>   endif
>   

This is now a conflict between the kbuild tree and Linus' tree.

-- 
Cheers,
Stephen Rothwell

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