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Date:   Sun, 27 Jan 2019 12:07:08 +0900
From:   Stafford Horne <shorne@gmail.com>
To:     Mike Rapoport <rppt@linux.ibm.com>
Cc:     linux-mm@kvack.org, Andrew Morton <akpm@linux-foundation.org>,
        Catalin Marinas <catalin.marinas@arm.com>,
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Subject: Re: [PATCH v2 01/21] openrisc: prefer memblock APIs returning
 virtual address
Message-ID: <20190127030708.GU3235@lianli.shorne-pla.net>
References: <1548057848-15136-1-git-send-email-rppt@linux.ibm.com>
 <1548057848-15136-2-git-send-email-rppt@linux.ibm.com>
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On Mon, Jan 21, 2019 at 10:03:48AM +0200, Mike Rapoport wrote:
> The allocation of the page tables memory in openrics uses
> memblock_phys_alloc() and then converts the returned physical address to
> virtual one. Use memblock_alloc_raw() and add a panic() if the allocation
> fails.
> 
> Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
> ---
>  arch/openrisc/mm/init.c | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/openrisc/mm/init.c b/arch/openrisc/mm/init.c
> index d157310..caeb418 100644
> --- a/arch/openrisc/mm/init.c
> +++ b/arch/openrisc/mm/init.c
> @@ -105,7 +105,10 @@ static void __init map_ram(void)
>  			}
>  
>  			/* Alloc one page for holding PTE's... */
> -			pte = (pte_t *) __va(memblock_phys_alloc(PAGE_SIZE, PAGE_SIZE));
> +			pte = memblock_alloc_raw(PAGE_SIZE, PAGE_SIZE);
> +			if (!pte)
> +				panic("%s: Failed to allocate page for PTEs\n",
> +				      __func__);
>  			set_pmd(pme, __pmd(_KERNPG_TABLE + __pa(pte)));
>  
>  			/* Fill the newly allocated page with PTE'S */

This seems reasonable to me.

Acked-by: Stafford Horne <shorne@gmail.com>