[PATCH] mm: clean up page_is_poisoned in linux/mm.h

[PATCH] mm: clean up page_is_poisoned in linux/mm.h

[kpark3469]

From: Sahara <keun-o.park@darkmatter.ae>

When bd33ef36("mm: enable page poisoning early at boot") got rid of
the PAGE_EXT_DEBUG_POISON, page_is_poisoned in the header left
behind. This patch cleans up the leftovers under the table.

Signed-off-by: Sahara <keun-o.park@darkmatter.ae>
---
 include/linux/mm.h | 2 --
 1 file changed, 2 deletions(-)

diff --git a/include/linux/mm.h b/include/linux/mm.h
index c6fa9a2..a53b0ad 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -2522,12 +2522,10 @@ extern int apply_to_page_range(struct mm_struct *mm, unsigned long address,
 #ifdef CONFIG_PAGE_POISONING
 extern bool page_poisoning_enabled(void);
 extern void kernel_poison_pages(struct page *page, int numpages, int enable);
-extern bool page_is_poisoned(struct page *page);
 #else
 static inline bool page_poisoning_enabled(void) { return false; }
 static inline void kernel_poison_pages(struct page *page, int numpages,
 					int enable) { }
-static inline bool page_is_poisoned(struct page *page) { return false; }
 #endif
 
 #ifdef CONFIG_DEBUG_PAGEALLOC
-- 
2.7.4

Re: [PATCH] mm: clean up page_is_poisoned in linux/mm.h

[Michal Hocko]

On Sun 03-06-18 12:22:18, kpark3469@gmail.com wrote:
> From: Sahara <keun-o.park@darkmatter.ae>
> 
> When bd33ef36("mm: enable page poisoning early at boot") got rid of
> the PAGE_EXT_DEBUG_POISON, page_is_poisoned in the header left
> behind. This patch cleans up the leftovers under the table.

Acked-by: Michal Hocko <mhocko@suse.com>

Btw. we tend to use abbrev = 12 for sha1 references.

> Signed-off-by: Sahara <keun-o.park@darkmatter.ae>
> ---
>  include/linux/mm.h | 2 --
>  1 file changed, 2 deletions(-)
> 
> diff --git a/include/linux/mm.h b/include/linux/mm.h
> index c6fa9a2..a53b0ad 100644
> --- a/include/linux/mm.h
> +++ b/include/linux/mm.h
> @@ -2522,12 +2522,10 @@ extern int apply_to_page_range(struct mm_struct *mm, unsigned long address,
>  #ifdef CONFIG_PAGE_POISONING
>  extern bool page_poisoning_enabled(void);
>  extern void kernel_poison_pages(struct page *page, int numpages, int enable);
> -extern bool page_is_poisoned(struct page *page);
>  #else
>  static inline bool page_poisoning_enabled(void) { return false; }
>  static inline void kernel_poison_pages(struct page *page, int numpages,
>  					int enable) { }
> -static inline bool page_is_poisoned(struct page *page) { return false; }
>  #endif
>  
>  #ifdef CONFIG_DEBUG_PAGEALLOC
> -- 
> 2.7.4

-- 
Michal Hocko
SUSE Labs