Re: [PATCH v1 1/2] video: fbdev: acornfb: remove free_unused_pages()

[Anshuman Khandual <anshuman.khandual@arm.com>]

On 1/26/21 11:51 PM, David Hildenbrand wrote:
> This function is never used and it is one of the last remaining user of
> __free_reserved_page(). Let's just drop it.
> 
> Cc: Andrew Morton <akpm@linux-foundation.org>
> Cc: Thomas Gleixner <tglx@linutronix.de>
> Cc: "Peter Zijlstra (Intel)" <peterz@infradead.org>
> Cc: Mike Rapoport <rppt@kernel.org>
> Cc: Oscar Salvador <osalvador@suse.de>
> Cc: Michal Hocko <mhocko@kernel.org>
> Cc: Wei Yang <richard.weiyang@linux.alibaba.com>
> Cc: "Gustavo A. R. Silva" <gustavoars@kernel.org>
> Cc: Sam Ravnborg <sam@ravnborg.org>
> Signed-off-by: David Hildenbrand <david@redhat.com>

There is no other reference for free_unused_pages() in the tree.

Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>

> ---
>  drivers/video/fbdev/acornfb.c | 34 ----------------------------------
>  1 file changed, 34 deletions(-)
> 
> diff --git a/drivers/video/fbdev/acornfb.c b/drivers/video/fbdev/acornfb.c
> index bcc92aecf666..1b72edc01cfb 100644
> --- a/drivers/video/fbdev/acornfb.c
> +++ b/drivers/video/fbdev/acornfb.c
> @@ -921,40 +921,6 @@ static int acornfb_detect_monitortype(void)
>  	return 4;
>  }
>  
> -/*
> - * This enables the unused memory to be freed on older Acorn machines.
> - * We are freeing memory on behalf of the architecture initialisation
> - * code here.
> - */
> -static inline void
> -free_unused_pages(unsigned int virtual_start, unsigned int virtual_end)
> -{
> -	int mb_freed = 0;
> -
> -	/*
> -	 * Align addresses
> -	 */
> -	virtual_start = PAGE_ALIGN(virtual_start);
> -	virtual_end = PAGE_ALIGN(virtual_end);
> -
> -	while (virtual_start < virtual_end) {
> -		struct page *page;
> -
> -		/*
> -		 * Clear page reserved bit,
> -		 * set count to 1, and free
> -		 * the page.
> -		 */
> -		page = virt_to_page(virtual_start);
> -		__free_reserved_page(page);
> -
> -		virtual_start += PAGE_SIZE;
> -		mb_freed += PAGE_SIZE / 1024;
> -	}
> -
> -	printk("acornfb: freed %dK memory\n", mb_freed);
> -}
> -
>  static int acornfb_probe(struct platform_device *dev)
>  {
>  	unsigned long size;
>