linux-kernel - Re: [PATCH trivial] include/linux/memblock.h: Clean up code for several trivial details

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Date:	Sun, 29 May 2016 08:08:47 -0700
From:	Joe Perches <joe@...ches.com>
To:	chengang@...ndsoft.com.cn, akpm@...ux-foundation.org,
	trivial@...nel.org
Cc:	kuleshovmail@...il.com, tony.luck@...el.com,
	tangchen@...fujitsu.com, will.deacon@....com, holt@....com,
	ard.biesheuvel@...aro.org, kirill.shutemov@...ux.intel.com,
	linux-kernel@...r.kernel.org, Chen Gang <gang.chen.5i5j@...il.com>
Subject: Re: [PATCH trivial] include/linux/memblock.h: Clean up code for
 several trivial details

On Sun, 2016-05-29 at 22:36 +0800, chengang@...ndsoft.com.cn wrote:
> From: Chen Gang <chengang@...ndsoft.com.cn>
> 
> Correct the function parameters alignment, since original code already
> use both tabs and white spaces together for the incorrect parameters
> alignment functions.
> 
> If one line can hold one statement within 80 columns, let it in one line
> (original code did not consider about the tabs/spaces for 2nd line when
> a statement is separated into 2 lines).
> 
> Use "!!" to let the boolean function return boolean value directly.
[]
> diff --git a/include/linux/memblock.h b/include/linux/memblock.h
[]
> @@ -191,12 +190,12 @@ static inline bool movable_node_is_enabled(void)
>  
>  static inline bool memblock_is_mirror(struct memblock_region *m)
>  {
> -	return m->flags & MEMBLOCK_MIRROR;
> +	return !!(m->flags & MEMBLOCK_MIRROR);

These !! uses are't necessary.
The compiler makes the bool return 0 or 1.

>  }
>  
>  static inline bool memblock_is_nomap(struct memblock_region *m)
>  {
> -	return m->flags & MEMBLOCK_NOMAP;
> +	return !!(m->flags & MEMBLOCK_NOMAP);
>  }