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

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Date:   Tue, 15 Sep 2020 17:48:55 -0700
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     <yanfei.xu@...driver.com>
Cc:     <linux-mm@...ck.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] mm/page_alloc.c: variable type of 'progress' should be
 'unsigned long'

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

> From: Yanfei Xu <yanfei.xu@...driver.com>
> 
> 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.