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Date:   Wed, 13 May 2020 14:14:45 -0700 (PDT)
Subject:     Re: [PATCH 07/10] riscv: Make SYS_SUPPORTS_HUGETLBFS depends on MMU
In-Reply-To: <20200511022001.179767-8-wangkefeng.wang@huawei.com>
CC:     Paul Walmsley <paul.walmsley@sifive.com>, aou@eecs.berkeley.edu,
        linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org,
        wangkefeng.wang@huawei.com, hulkci@huawei.com
From:   Palmer Dabbelt <palmer@dabbelt.com>
To:     wangkefeng.wang@huawei.com
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On Sun, 10 May 2020 19:19:58 PDT (-0700), wangkefeng.wang@huawei.com wrote:
> HUGETLBFS only used when MMU enabled, add the dependence.
>
> Reported-by: Hulk Robot <hulkci@huawei.com>
> Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
> ---
>  arch/riscv/Kconfig | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
> index 494e670520ae..d0010ed8e0f4 100644
> --- a/arch/riscv/Kconfig
> +++ b/arch/riscv/Kconfig
> @@ -138,6 +138,7 @@ config ARCH_SUPPORTS_DEBUG_PAGEALLOC
>  	def_bool y
>
>  config SYS_SUPPORTS_HUGETLBFS
> +	depends on MMU
>  	def_bool y

I don't think this is the right way to do this: there's nothing specific to the
RISC-V implementation that makes HUGETLBFS depend on MMU.  That said, SH
appears to do it this way so I'm OK taking this for now.

>
>  config STACKTRACE_SUPPORT