Re: [PATCH v2 1/3] mm/sparse: Add a static variable nr_present_sections

[Andrew Morton]

On Thu, 22 Feb 2018 17:11:28 +0800 Baoquan He <bhe@xxxxxxxxxx> wrote:

> It's used to record how many memory sections are marked as present
> during system boot up, and will be used in the later patch.
> 
> --- a/mm/sparse.c
> +++ b/mm/sparse.c
> @@ -202,6 +202,7 @@ static inline int next_present_section_nr(int section_nr)
>  	      (section_nr <= __highest_present_section_nr));	\
>  	     section_nr = next_present_section_nr(section_nr))
>  
> +static int nr_present_sections;

I think this could be __initdata.

A nice comment explaining why it exists would be nice.