linux-kernel - Re: linux-next: manual merge of the akpm-current tree with the arm64 tree

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Message-ID: <20181211171230.7847fd48@canb.auug.org.au>
Date:   Tue, 11 Dec 2018 17:12:30 +1100
From:   Stephen Rothwell <sfr@...b.auug.org.au>
To:     Andrew Morton <akpm@...ux-foundation.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>
Cc:     Linux Next Mailing List <linux-next@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Andrey Konovalov <andreyknvl@...gle.com>,
        Steve Capper <steve.capper@....com>
Subject: Re: linux-next: manual merge of the akpm-current tree with the
 arm64 tree

Hi all,

[Sent to early with people missing ...]

On Tue, 11 Dec 2018 17:11:02 +1100 Stephen Rothwell <sfr@...b.auug.org.au> wrote:
>
> Today's linux-next merge of the akpm-current tree got a conflict in:
> 
>   arch/arm64/mm/proc.S
> 
> between commits:
> 
>   67e7fdfcc682 ("arm64: mm: introduce 52-bit userspace support")
>   68d23da4373a ("rm64: Kconfig: Re-jig CONFIG options for 52-bit VA")
> 
> from the arm64 tree and commit:
> 
>   089dc516f651 ("kasan, arm64: enable top byte ignore for the kernel")
> 
> from the akpm-current 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/mm/proc.S
> index e05b3ce1db6b,d861f208eeb1..73886a5f1f30
> --- a/arch/arm64/mm/proc.S
> +++ b/arch/arm64/mm/proc.S
> @@@ -449,16 -451,8 +455,16 @@@ ENTRY(__cpu_setup
>   	 */
>   	ldr	x10, =TCR_TxSZ(VA_BITS) | TCR_CACHE_FLAGS | TCR_SMP_FLAGS | \
>   			TCR_TG_FLAGS | TCR_KASLR_FLAGS | TCR_ASID16 | \
> - 			TCR_TBI0 | TCR_A1
> + 			TCR_TBI0 | TCR_A1 | TCR_KASAN_FLAGS
>  -	tcr_set_idmap_t0sz	x10, x9
>  +
>  +#ifdef CONFIG_ARM64_USER_VA_BITS_52
>  +	ldr_l		x9, vabits_user
>  +	sub		x9, xzr, x9
>  +	add		x9, x9, #64
>  +#else
>  +	ldr_l		x9, idmap_t0sz
>  +#endif
>  +	tcr_set_t0sz	x10, x9
>   
>   	/*
>   	 * Set the IPS bits in TCR_EL1.

-- 
Cheers,
Stephen Rothwell

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