linux-kernel - Re: [PATCH 04/12] x86/mm/hotplug: Simplify sync_global

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Message-ID: <20150612222830.GA23855@redhat.com>
Date:	Sat, 13 Jun 2015 00:28:30 +0200
From:	Oleg Nesterov <oleg@...hat.com>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	linux-kernel@...r.kernel.org, linux-mml@...r.kernel.org,
	Andy Lutomirski <luto@...capital.net>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Denys Vlasenko <dvlasenk@...hat.com>,
	Brian Gerst <brgerst@...il.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Borislav Petkov <bp@...en8.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Waiman Long <Waiman.Long@...com>
Subject: Re: [PATCH 04/12] x86/mm/hotplug: Simplify sync_global_pgds()

Yes I guess I am totally confused ;)

On 06/11, Ingo Molnar wrote:
>
> @@ -178,7 +178,7 @@ void sync_global_pgds(unsigned long start, unsigned long end, int removed)
>  		 *
>  		 * So clear the affected entries in every process PGD as well:
>  		 */
> -		if (pgd_none(*pgd_ref) && !removed)
> +		if (pgd_none(*pgd_ref))

But doesn't this change invalidate the comment above?

Oleg.

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