linux-kernel - RE: [PATCH 2/6] mm/page_alloc.c: simplify the code by using macro K()

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Date:   Wed, 1 Sep 2021 21:25:40 +0000
From:   David Laight <David.Laight@...LAB.COM>
To:     'Miaohe Lin' <linmiaohe@...wei.com>,
        Oleksandr Natalenko <oleksandr@...alenko.name>
CC:     "vbabka@...e.cz" <vbabka@...e.cz>,
        "sfr@...b.auug.org.au" <sfr@...b.auug.org.au>,
        "peterz@...radead.org" <peterz@...radead.org>,
        "mgorman@...hsingularity.net" <mgorman@...hsingularity.net>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Andrew Morton <akpm@...ux-foundation.org>
Subject: RE: [PATCH 2/6] mm/page_alloc.c: simplify the code by using macro K()

From: Miaohe Lin
> Sent: 01 September 2021 08:38
...
> >>> Shouldn't this macro go to some header file instead to get rid of define
> >>> repetitions?
> >>
> >> Many thanks for figuring this out. I think we should get rid of these
> >> repetitions too. But I'am not sure where this definition should be. Any
> >> suggestion? Thanks.
> >
> > I'm not sure what place suits best. At first I thought maybe linux/mm.h or
> > linux/mm_inline.h, but since PAGE_SHIFT is declared in asm-generic/page.h,
> > probably K(x) can also go there as well?
> 
> K(x) is relevant with PAGE_SHIFT. So I think K(x) can also go asm-generic/page.h too.
> Am I supposed to do this when free or will you kindly do this?

It is a bit of a short name to go in a public header file.

	David

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