linux-kernel - Re: lmb: Remove __init from lmb_end_of

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Date:	Fri, 28 Aug 2009 17:21:28 +1000
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Linux Kernel list <linux-kernel@...r.kernel.org>,
	"David S. Miller" <davem@...emloft.net>,
	linuxppc-dev list <linuxppc-dev@...abs.org>
Subject: Re: lmb: Remove __init from lmb_end_of_DRAM()

On Thu, 2009-08-27 at 19:59 +0000, Linux Kernel Mailing List wrote:
> Gitweb:     http://git.kernel.org/linus/4f8ee2c9cc0e885d2bb50ef26db66150ab25213e
> Commit:     4f8ee2c9cc0e885d2bb50ef26db66150ab25213e
> Parent:     cf481442f2e086316ed8a1b3046f00ad23632ac4
> Author:     Benjamin Herrenschmidt <benh@...nel.crashing.org>
> AuthorDate: Thu Aug 27 17:20:30 2009 +1000
> Committer:  Linus Torvalds <torvalds@...ux-foundation.org>
> CommitDate: Thu Aug 27 12:25:26 2009 -0700
> 
>     lmb: Remove __init from lmb_end_of_DRAM()
>     
>     We call lmb_end_of_DRAM() to test whether a DMA mask is ok on a machine
>     without IOMMU, but this function is marked as __init.
>     
>     I don't think there's a clean way to get the top of RAM max_pfn doesn't
>     appear to include highmem or I missed (or we have a bug :-) so for now,
>     let's just avoid having a broken 2.6.31 by making this function
>     non-__init and we can revisit later.

And another brown paper bag for me ! Patch is fine, but doesn't do the
job because some idiot (me) didn't actually test (it looked so obvious)
and didn't notice somebody had the strange idea to also put __init on
the declaration in the .h file ! Ugh.

I'll send another patch later, have to run home now.

Cheers,
Ben.


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