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

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Date:   Fri, 8 Jun 2018 09:52:20 +1000
From:   Stephen Rothwell <sfr@...b.auug.org.au>
To:     Masahiro Yamada <yamada.masahiro@...ionext.com>
Cc:     Michael Ellerman <mpe@...erman.id.au>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        PowerPC <linuxppc-dev@...ts.ozlabs.org>,
        Linux-Next Mailing List <linux-next@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Nicholas Piggin <npiggin@...il.com>,
        "Naveen N. Rao" <naveen.n.rao@...ux.vnet.ibm.com>
Subject: Re: linux-next: manual merge of the powerpc tree with the kbuild
 tree

Hi all,

On Thu, 31 May 2018 09:32:16 +1000 Stephen Rothwell <sfr@...b.auug.org.au> wrote:
>
> Today's linux-next merge of the powerpc tree got a conflict in:
> 
>   arch/powerpc/kernel/module_64.c
> 
> between commit:
> 
>   06aeb9e3f2bc ("powerpc/kbuild: move -mprofile-kernel check to Kconfig")
> 
> from the kbuild tree and commit:
> 
>   250122baed29 ("powerpc64/module: Tighten detection of mcount call sites with -mprofile-kernel")
> 
> 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.
> 
> -- 
> Cheers,
> Stephen Rothwell
> 
> diff --cc arch/powerpc/kernel/module_64.c
> index 55bccc315e1a,f7667e2ebfcb..000000000000
> --- a/arch/powerpc/kernel/module_64.c
> +++ b/arch/powerpc/kernel/module_64.c
> @@@ -462,9 -466,12 +466,12 @@@ static unsigned long stub_for_addr(cons
>   	return (unsigned long)&stubs[i];
>   }
>   
>  -#ifdef CC_USING_MPROFILE_KERNEL
>  +#ifdef CONFIG_MPROFILE_KERNEL
> - static bool is_early_mcount_callsite(u32 *instruction)
> + static bool is_mprofile_mcount_callsite(const char *name, u32 *instruction)
>   {
> + 	if (strcmp("_mcount", name))
> + 		return false;
> + 
>   	/*
>   	 * Check if this is one of the -mprofile-kernel sequences.
>   	 */

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

-- 
Cheers,
Stephen Rothwell

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