diff mbox series

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

Message ID 20210126182113.19892-2-david@redhat.com (mailing list archive)
State New
Headers show
Series mm: simplify free_highmem_page() and free_reserved_page() | expand

Commit Message

David Hildenbrand Jan. 26, 2021, 6:21 p.m. UTC
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>
---
 drivers/video/fbdev/acornfb.c | 34 ----------------------------------
 1 file changed, 34 deletions(-)

Comments

Geert Uytterhoeven Jan. 27, 2021, 8:44 a.m. UTC | #1
On Tue, Jan 26, 2021 at 11:54 PM David Hildenbrand <david@redhat.com> 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>

Fixes: ffd29195ed720188 ("drivers/video/acornfb.c: remove dead code")

Gr{oetje,eeting}s,

                        Geert
Oscar Salvador Jan. 27, 2021, 11:53 a.m. UTC | #2
On Tue, Jan 26, 2021 at 07:21:12PM +0100, 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>

Reviewed-by: Oscar Salvador <osalvador@suse.de>

> ---
>  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;
> -- 
> 2.29.2
>
Anshuman Khandual Jan. 28, 2021, 3:54 a.m. UTC | #3
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;
>
diff mbox series

Patch

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;