[PATCH] mm: Remove unused functions is_{normal_idx, normal, dma32, dma}

[PATCH] mm: Remove unused functions is_{normal_idx, normal, dma32, dma}

[Zhang Yanfei]

From: Zhang Yanfei <zhangyanfei@cn.fujitsu.com>

These functions are nowhere used, so remove them.

Signed-off-by: Zhang Yanfei <zhangyanfei@cn.fujitsu.com>
---
 include/linux/mmzone.h |   28 ----------------------------
 1 files changed, 0 insertions(+), 28 deletions(-)

diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index 5c76737..32f0105 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -843,11 +843,6 @@ static inline int is_highmem_idx(enum zone_type idx)
 #endif
 }
 
-static inline int is_normal_idx(enum zone_type idx)
-{
-	return (idx == ZONE_NORMAL);
-}
-
 /**
  * is_highmem - helper function to quickly check if a struct zone is a 
  *              highmem zone or not.  This is an attempt to keep references
@@ -866,29 +861,6 @@ static inline int is_highmem(struct zone *zone)
 #endif
 }
 
-static inline int is_normal(struct zone *zone)
-{
-	return zone == zone->zone_pgdat->node_zones + ZONE_NORMAL;
-}
-
-static inline int is_dma32(struct zone *zone)
-{
-#ifdef CONFIG_ZONE_DMA32
-	return zone == zone->zone_pgdat->node_zones + ZONE_DMA32;
-#else
-	return 0;
-#endif
-}
-
-static inline int is_dma(struct zone *zone)
-{
-#ifdef CONFIG_ZONE_DMA
-	return zone == zone->zone_pgdat->node_zones + ZONE_DMA;
-#else
-	return 0;
-#endif
-}
-
 /* These two functions are used to setup the per zone pages min values */
 struct ctl_table;
 int min_free_kbytes_sysctl_handler(struct ctl_table *, int,
-- 
1.7.1

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Re: [PATCH] mm: Remove unused functions is_{normal_idx, normal, dma32, dma}

[Andrew Morton]

On Fri, 14 Jun 2013 20:39:13 +0800 Zhang Yanfei <zhangyanfei.yes@gmail.com> wrote:

> From: Zhang Yanfei <zhangyanfei@cn.fujitsu.com>
> 
> These functions are nowhere used, so remove them.
> 
> --- a/include/linux/mmzone.h
> +++ b/include/linux/mmzone.h
> @@ -843,11 +843,6 @@ static inline int is_highmem_idx(enum zone_type idx)
>  #endif
>  }
>  
> -static inline int is_normal_idx(enum zone_type idx)
> -{
> -	return (idx == ZONE_NORMAL);
> -}
> -
>  /**
>   * is_highmem - helper function to quickly check if a struct zone is a 
>   *              highmem zone or not.  This is an attempt to keep references
> @@ -866,29 +861,6 @@ static inline int is_highmem(struct zone *zone)
>  #endif
>  }
>  
> -static inline int is_normal(struct zone *zone)
> -{
> -	return zone == zone->zone_pgdat->node_zones + ZONE_NORMAL;
> -}
> -
> -static inline int is_dma32(struct zone *zone)
> -{
> -#ifdef CONFIG_ZONE_DMA32
> -	return zone == zone->zone_pgdat->node_zones + ZONE_DMA32;
> -#else
> -	return 0;
> -#endif
> -}
> -
> -static inline int is_dma(struct zone *zone)
> -{
> -#ifdef CONFIG_ZONE_DMA
> -	return zone == zone->zone_pgdat->node_zones + ZONE_DMA;
> -#else
> -	return 0;
> -#endif
> -}
> -
>  /* These two functions are used to setup the per zone pages min values */
>  struct ctl_table;
>  int min_free_kbytes_sysctl_handler(struct ctl_table *, int,

huh.

My first inclination is to leave them alone - they cause no harm apart
from a tiny increase in compilation time and they might be used in the
future.

But their names are all quite poor - should be zone_is_normal(), etc.

So yes, let's zap them and hope that if they get resurrected, it will
be with better naming.

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