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From:   Michael Ellerman <mpe@ellerman.id.au>
To:     Jason Yan <yanaijie@huawei.com>, linuxppc-dev@lists.ozlabs.org,
        diana.craciun@nxp.com, christophe.leroy@c-s.fr,
        benh@kernel.crashing.org, paulus@samba.org, npiggin@gmail.com,
        keescook@chromium.org, kernel-hardening@lists.openwall.com
Cc:     linux-kernel@vger.kernel.org, wangkefeng.wang@huawei.com,
        yebin10@huawei.com, thunder.leizhen@huawei.com,
        jingxiangfeng@huawei.com, fanchengyang@huawei.com,
        zhaohongjiang@huawei.com, Jason Yan <yanaijie@huawei.com>
Subject: Re: [PATCH v5 02/10] powerpc: move memstart_addr and kernstart_addr to init-common.c
In-Reply-To: <20190807065706.11411-3-yanaijie@huawei.com>
References: <20190807065706.11411-1-yanaijie@huawei.com> <20190807065706.11411-3-yanaijie@huawei.com>
Date:   Wed, 07 Aug 2019 23:02:26 +1000
Message-ID: <874l2tuo0t.fsf@concordia.ellerman.id.au>
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Sender: linux-kernel-owner@vger.kernel.org
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Jason Yan <yanaijie@huawei.com> writes:
> These two variables are both defined in init_32.c and init_64.c. Move
> them to init-common.c.
>
> Signed-off-by: Jason Yan <yanaijie@huawei.com>
> Cc: Diana Craciun <diana.craciun@nxp.com>
> Cc: Michael Ellerman <mpe@ellerman.id.au>
> Cc: Christophe Leroy <christophe.leroy@c-s.fr>
> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
> Cc: Paul Mackerras <paulus@samba.org>
> Cc: Nicholas Piggin <npiggin@gmail.com>
> Cc: Kees Cook <keescook@chromium.org>
> Reviewed-by: Christophe Leroy <christophe.leroy@c-s.fr>
> Reviewed-by: Diana Craciun <diana.craciun@nxp.com>
> Tested-by: Diana Craciun <diana.craciun@nxp.com>
> ---
>  arch/powerpc/mm/init-common.c | 5 +++++
>  arch/powerpc/mm/init_32.c     | 5 -----
>  arch/powerpc/mm/init_64.c     | 5 -----
>  3 files changed, 5 insertions(+), 10 deletions(-)
>
> diff --git a/arch/powerpc/mm/init-common.c b/arch/powerpc/mm/init-common.c
> index a84da92920f7..152ae0d21435 100644
> --- a/arch/powerpc/mm/init-common.c
> +++ b/arch/powerpc/mm/init-common.c
> @@ -21,6 +21,11 @@
>  #include <asm/pgtable.h>
>  #include <asm/kup.h>
>  
> +phys_addr_t memstart_addr = (phys_addr_t)~0ull;
> +EXPORT_SYMBOL_GPL(memstart_addr);
> +phys_addr_t kernstart_addr;
> +EXPORT_SYMBOL_GPL(kernstart_addr);

Would be nice if these can be __ro_after_init ?

cheers