linux-kernel - Re: [PATCH] net: via-rhine: fix compiler warning

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Date:	Wed, 30 Apr 2014 12:08:42 +0200
From:	Jan Moskyto Matejka <mq@...e.cz>
To:	David Laight <David.Laight@...LAB.COM>
Cc:	Alexey Charkov <alchark@...il.com>, Roger Luethi <rl@...lgate.ch>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] net: via-rhine: fix compiler warning

> > Also thanks for suggesting (void*)->(unsigned long), I didn't
> > know that these two are defined to have the same size (in kernel code).
> 
> The kernel assumes that throughout - the double cast is common.
> The C99 type is uintptr_t - but I don't think that is defined in kernel.
> The only place I know where sizeof (long) != sizeof (void *) is 64bit
> windows. So anyone trying to compile a linux driver to run in the
> windows kernel might have issues (never mind the GPL ones).

My colleague here has just explained me the same. :)

Being a linux-kernel newbie, I'm learning every day. Kernel programming
is more different from userspace than I ever thought. Thank you for your
patience.
-- 
Jan Matějka <mq@...e.cz>
SUSE Labs

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