Re: [PATCH] mm: avoid possible multiple call to swap_node()

From: linmiaohe
Date: Thu Sep 17 2020 - 07:57:49 EST

Matthew Wilcox <willy@xxxxxxxxxxxxx> wrote:
> On Thu, Sep 17, 2020 at 07:44:49AM -0400, Miaohe Lin wrote:
>> Cache the swap_node() in a local variable to avoid possible multiple
>> call to swap_node(), though compiler may do this for us.
>Why don't you find out? Compare the assembly before and after, see what the compiler did.

In fact, I don't care if the compiler can really do this for us. I think it's better to do this explicity. I think this can improve the readability.