linux-kernel - Re: linux-next: build failure after merge of the aio tree

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Date:	Fri, 29 Jan 2016 13:03:39 +0100
From:	Geert Uytterhoeven <geert@...ux-m68k.org>
To:	Russell King - ARM Linux <linux@....linux.org.uk>
Cc:	Stephen Rothwell <sfr@...b.auug.org.au>,
	Benjamin LaHaise <bcrl@...ck.org>,
	Linux-Next <linux-next@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: linux-next: build failure after merge of the aio tree

On Fri, Jan 29, 2016 at 12:30 PM, Russell King - ARM Linux
<linux@....linux.org.uk> wrote:
>> Background: new aio code is adding __get_user() calls referencing 64
>> bit quantities (__u64 and __s64).
>
> There's lots more architectures which do not support 64-bit get_user()
> _or_ __get_user(): avr32, blackfin, metag for example, and m68k which
> has this interesting thing "/* case 8: disabled because gcc-4.1 has a
> broken typeof \" in its *get_user() implementation.

And if you enable it again, you get lots of "warning: cast to pointer from
integer of different size", like you mentioned.

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds