linux-kernel - Re: linux-next: manual merge of the kvm tree with the arm64-fixes tree

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Message-ID: <20201218103151.GA5258@gaia>
Date:   Fri, 18 Dec 2020 10:31:52 +0000
From:   Catalin Marinas <catalin.marinas@....com>
To:     Stephen Rothwell <sfr@...b.auug.org.au>
Cc:     Paolo Bonzini <pbonzini@...hat.com>, KVM <kvm@...r.kernel.org>,
        Will Deacon <will@...nel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Next Mailing List <linux-next@...r.kernel.org>,
        Marc Zyngier <maz@...nel.org>
Subject: Re: linux-next: manual merge of the kvm tree with the arm64-fixes
 tree

On Fri, Dec 18, 2020 at 01:47:39PM +1100, Stephen Rothwell wrote:
> Today's linux-next merge of the kvm tree got a conflict in:
> 
>   arch/arm64/include/asm/kvm_asm.h
> 
> between commit:
> 
>   9fd339a45be5 ("arm64: Work around broken GCC 4.9 handling of "S" constraint")
> 
> from the arm64-fixes tree and commit:
> 
>   b881cdce77b4 ("KVM: arm64: Allocate hyp vectors statically")
> 
> from the kvm 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/arm64/include/asm/kvm_asm.h
> index 8e5fa28b78c2,7ccf770c53d9..000000000000
> --- a/arch/arm64/include/asm/kvm_asm.h
> +++ b/arch/arm64/include/asm/kvm_asm.h
> @@@ -198,14 -199,6 +199,12 @@@ extern void __vgic_v3_init_lrs(void)
>   
>   extern u32 __kvm_get_mdcr_el2(void);
>   
> - extern char __smccc_workaround_1_smc[__SMCCC_WORKAROUND_1_SMC_SZ];
> - 
>  +#if defined(GCC_VERSION) && GCC_VERSION < 50000
>  +#define SYM_CONSTRAINT	"i"
>  +#else
>  +#define SYM_CONSTRAINT	"S"
>  +#endif
>  +
>   /*
>    * Obtain the PC-relative address of a kernel symbol
>    * s: symbol

Thanks Stephen, it looks fine. I'll send a pull request later today with
this commit but it's simple enough for Linus to fix it.

-- 
Catalin