linux-kernel - Re: [PATCH] m68k: mm: Remove superfluous memblock

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Date:   Thu, 27 Aug 2020 10:13:50 +1000
From:   Greg Ungerer <gerg@...ux-m68k.org>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>,
        linux-m68k@...ts.linux-m68k.org
Cc:     Mike Rapoport <rppt@...nel.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] m68k: mm: Remove superfluous memblock_alloc*() casts

Hi Geert,

On 26/8/20 11:04 pm, Geert Uytterhoeven wrote:
> The return type of memblock_alloc*() is a void pointer, so there is no
> need to cast it to "void *" or some other pointer type, before assigning
> it to a pointer variable.
> 
> Signed-off-by: Geert Uytterhoeven <geert@...ux-m68k.org>

Acked-by: Greg Ungerer <gerg@...ux-m68k.org>

Regards
Greg


>   arch/m68k/mm/mcfmmu.c   | 2 +-
>   arch/m68k/mm/motorola.c | 5 ++---
>   2 files changed, 3 insertions(+), 4 deletions(-)
> 
> diff --git a/arch/m68k/mm/mcfmmu.c b/arch/m68k/mm/mcfmmu.c
> index 2b9cb4a622811390..eac9dde65193443e 100644
> --- a/arch/m68k/mm/mcfmmu.c
> +++ b/arch/m68k/mm/mcfmmu.c
> @@ -42,7 +42,7 @@ void __init paging_init(void)
>   	unsigned long max_zone_pfn[MAX_NR_ZONES] = { 0 };
>   	int i;
>   
> -	empty_zero_page = (void *) memblock_alloc(PAGE_SIZE, PAGE_SIZE);
> +	empty_zero_page = memblock_alloc(PAGE_SIZE, PAGE_SIZE);
>   	if (!empty_zero_page)
>   		panic("%s: Failed to allocate %lu bytes align=0x%lx\n",
>   		      __func__, PAGE_SIZE, PAGE_SIZE);
> diff --git a/arch/m68k/mm/motorola.c b/arch/m68k/mm/motorola.c
> index a9bdde54ca350197..3a653f0a4188d4af 100644
> --- a/arch/m68k/mm/motorola.c
> +++ b/arch/m68k/mm/motorola.c
> @@ -227,7 +227,7 @@ static pte_t * __init kernel_page_table(void)
>   	pte_t *pte_table = last_pte_table;
>   
>   	if (PAGE_ALIGNED(last_pte_table)) {
> -		pte_table = (pte_t *)memblock_alloc_low(PAGE_SIZE, PAGE_SIZE);
> +		pte_table = memblock_alloc_low(PAGE_SIZE, PAGE_SIZE);
>   		if (!pte_table) {
>   			panic("%s: Failed to allocate %lu bytes align=%lx\n",
>   					__func__, PAGE_SIZE, PAGE_SIZE);
> @@ -275,8 +275,7 @@ static pmd_t * __init kernel_ptr_table(void)
>   
>   	last_pmd_table += PTRS_PER_PMD;
>   	if (PAGE_ALIGNED(last_pmd_table)) {
> -		last_pmd_table = (pmd_t *)memblock_alloc_low(PAGE_SIZE,
> -							   PAGE_SIZE);
> +		last_pmd_table = memblock_alloc_low(PAGE_SIZE, PAGE_SIZE);
>   		if (!last_pmd_table)
>   			panic("%s: Failed to allocate %lu bytes align=%lx\n",
>   			      __func__, PAGE_SIZE, PAGE_SIZE);
>