Re: [PATCH] mm/page_alloc.c: variable type of 'progress' should be 'unsigned long'

[Andrew Morton]

On Tue, 15 Sep 2020 18:46:20 +0800 <yanfei.xu@xxxxxxxxxxxxx> wrote:

> From: Yanfei Xu <yanfei.xu@xxxxxxxxxxxxx>
> 
> try_to_free_pages returns the number of pages reclaimed, and the type of
> returns is 'unsigned long'. So we should use a matched type for storing
> it.
> 

__perform_reclaim() returns an int, so this change is fairly pointless.

However __perform_reclaim()'s single caller expects it to return
unsigned long, so including that change in this patch would make more
sense.