linux-kernel - Re: [PATCH v2 09/15] MIPS: memblock: Simplify DMA contiguous reservation

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Message-ID: <211f951d-8704-76ed-c9a8-1ff5256d641f@mips.com>
Date:   Tue, 13 Feb 2018 13:51:41 +0000
From:   Matt Redfearn <matt.redfearn@...s.com>
To:     Serge Semin <fancer.lancer@...il.com>, <ralf@...ux-mips.org>,
        <miodrag.dinic@...s.com>, <jhogan@...nel.org>,
        <goran.ferenc@...s.com>, <david.daney@...ium.com>,
        <paul.gortmaker@...driver.com>, <paul.burton@...s.com>,
        <alex.belits@...ium.com>, <Steven.Hill@...ium.com>
CC:     <alexander.sverdlin@...ia.com>, <kumba@...too.org>,
        <marcin.nowakowski@...s.com>, <James.hogan@...s.com>,
        <Peter.Wotton@...s.com>, <Sergey.Semin@...latforms.ru>,
        <linux-mips@...ux-mips.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 09/15] MIPS: memblock: Simplify DMA contiguous
 reservation

Hi Serge,

On 02/02/18 03:54, Serge Semin wrote:
> CMA reserves it areas in the memblock allocator. Since we aren't
> using bootmem anymore, the reservations copying should be discarded.
> 
> Signed-off-by: Serge Semin <fancer.lancer@...il.com>

Looks good to me

Reviewed-by: Matt Redfearn <matt.redfearn@...s.com>

Thanks,
Matt

> ---
>   arch/mips/kernel/setup.c | 6 +-----
>   1 file changed, 1 insertion(+), 5 deletions(-)
> 
> diff --git a/arch/mips/kernel/setup.c b/arch/mips/kernel/setup.c
> index 54302319ce1c..158a52c17e29 100644
> --- a/arch/mips/kernel/setup.c
> +++ b/arch/mips/kernel/setup.c
> @@ -755,7 +755,7 @@ static void __init request_crashkernel(struct resource *res)
>   
>   static void __init arch_mem_init(char **cmdline_p)
>   {
> -	struct memblock_region *reg;
> +	struct memblock_region *reg __maybe_unused;
>   	extern void plat_mem_setup(void);
>   
>   	/* call board setup routine */
> @@ -846,10 +846,6 @@ static void __init arch_mem_init(char **cmdline_p)
>   	plat_swiotlb_setup();
>   
>   	dma_contiguous_reserve(PFN_PHYS(max_low_pfn));
> -	/* Tell bootmem about cma reserved memblock section */
> -	for_each_memblock(reserved, reg)
> -		if (reg->size != 0)
> -			reserve_bootmem(reg->base, reg->size, BOOTMEM_DEFAULT);
>   }
>   
>   static void __init resource_init(void)
>