linux-kernel - Re: [PATCH -next v4] mm/hotplug: silence a lockdep splat with printk()

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Message-Id: <D58FE32E-C5D9-4812-BCD8-BB3E6C4A7C55@lca.pw>
Date:   Fri, 17 Jan 2020 08:30:24 -0500
From:   Qian Cai <cai@....pw>
To:     David Hildenbrand <david@...hat.com>
Cc:     akpm@...ux-foundation.org, mhocko@...nel.org,
        sergey.senozhatsky.work@...il.com, pmladek@...e.com,
        rostedt@...dmis.org, peterz@...radead.org, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, Michal Hocko <mhocko@...e.com>
Subject: Re: [PATCH -next v4] mm/hotplug: silence a lockdep splat with printk()



> On Jan 17, 2020, at 7:53 AM, David Hildenbrand <david@...hat.com> wrote:
> 
> Can't we just use the zone_idx() stored in the memmap instead?

I am having a hard time to guess what that means. Care to elaborate?