linux-kernel - Re: [PATCH 2/3] m68k/page_no.h: force _

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Message-ID: <20180703150535.GA21590@bombadil.infradead.org>
Date:   Tue, 3 Jul 2018 08:05:35 -0700
From:   Matthew Wilcox <willy@...radead.org>
To:     Mike Rapoport <rppt@...ux.vnet.ibm.com>
Cc:     Michal Hocko <mhocko@...nel.org>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Greg Ungerer <gerg@...ux-m68k.org>,
        Sam Creasey <sammy@...my.net>, linux-m68k@...ts.linux-m68k.org,
        linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/3] m68k/page_no.h: force __va argument to be unsigned
 long

On Tue, Jul 03, 2018 at 06:03:16PM +0300, Mike Rapoport wrote:
> On Tue, Jul 03, 2018 at 04:20:54PM +0200, Michal Hocko wrote:
> > On Tue 03-07-18 13:29:54, Mike Rapoport wrote:
> > > Add explicit casting to unsigned long to the __va() parameter
> > 
> > Why is this needed?
> 
> To make it consitent with other architecures and asm-generic :)
> 
> But more importantly, __memblock_free_late() passes u64 to page_to_pfn().

Why does memblock work in terms of u64 instead of phys_addr_t?