linux-kernel - Re: [PATCH v2 01/11] powerpc/mm: fix erroneous duplicate slb_addr

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Message-Id: <878svxb7jj.fsf@linux.ibm.com>
Date:   Fri, 26 Apr 2019 12:02:48 +0530
From:   "Aneesh Kumar K.V" <aneesh.kumar@...ux.ibm.com>
To:     Christophe Leroy <christophe.leroy@....fr>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>
Cc:     linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 01/11] powerpc/mm: fix erroneous duplicate slb_addr_limit init

Christophe Leroy <christophe.leroy@....fr> writes:

> Commit 67fda38f0d68 ("powerpc/mm: Move slb_addr_linit to
> early_init_mmu") moved slb_addr_limit init out of setup_arch().
>
> Commit 701101865f5d ("powerpc/mm: Reduce memory usage for mm_context_t
> for radix") brought it back into setup_arch() by error.
>
> This patch reverts that erroneous regress.
>

Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@...ux.ibm.com>

> Fixes: 701101865f5d ("powerpc/mm: Reduce memory usage for mm_context_t for radix")
> Signed-off-by: Christophe Leroy <christophe.leroy@....fr>
> ---
>  arch/powerpc/kernel/setup-common.c | 6 ------
>  1 file changed, 6 deletions(-)
>
> diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c
> index 1729bf409562..7af085b38cd1 100644
> --- a/arch/powerpc/kernel/setup-common.c
> +++ b/arch/powerpc/kernel/setup-common.c
> @@ -950,12 +950,6 @@ void __init setup_arch(char **cmdline_p)
>  	init_mm.end_data = (unsigned long) _edata;
>  	init_mm.brk = klimit;
>  
> -#ifdef CONFIG_PPC_MM_SLICES
> -#if defined(CONFIG_PPC_8xx)
> -	init_mm.context.slb_addr_limit = DEFAULT_MAP_WINDOW;
> -#endif
> -#endif
> -
>  #ifdef CONFIG_SPAPR_TCE_IOMMU
>  	mm_iommu_init(&init_mm);
>  #endif
> -- 
> 2.13.3