Re: [PATCH] include/linux/list_bl.h: Use bool instead of int for boolean functions

[Heiko Carstens]

On Mon, Jan 25, 2016 at 04:58:18AM +0800, chengang@xxxxxxxxxxxxxxxx wrote:
> From: Chen Gang <chengang@xxxxxxxxxxxxxxxx>
> 
> hlist_bl_unhashed() and hlist_bl_empty() are all boolean functions, so
> return bool instead of int.
> 
> Signed-off-by: Chen Gang <gang.chen.5i5j@xxxxxxxxx>
> ---
>  include/linux/list_bl.h | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/include/linux/list_bl.h b/include/linux/list_bl.h
> index ee7229a..cb48330 100644
> --- a/include/linux/list_bl.h
> +++ b/include/linux/list_bl.h
> @@ -48,7 +48,7 @@ static inline void INIT_HLIST_BL_NODE(struct hlist_bl_node *h)
>  
>  #define hlist_bl_entry(ptr, type, member) container_of(ptr,type,member)
>  
> -static inline int hlist_bl_unhashed(const struct hlist_bl_node *h)
> +static inline bool  hlist_bl_unhashed(const struct hlist_bl_node *h)
>  {
>  	return !h->pprev;
>  }
> @@ -68,7 +68,7 @@ static inline void hlist_bl_set_first(struct hlist_bl_head *h,
>  	h->first = (struct hlist_bl_node *)((unsigned long)n | LIST_BL_LOCKMASK);
>  }
>  
> -static inline int hlist_bl_empty(const struct hlist_bl_head *h)
> +static inline bool hlist_bl_empty(const struct hlist_bl_head *h)
>  {
>  	return !((unsigned long)READ_ONCE(h->first) & ~LIST_BL_LOCKMASK);

Sorry for my ignorance, but what's the point of doing conversions like
this? It has zero impact on code generation.