netdev - Re: [PATCH net-next] mdio: Export mdio.h to userland

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Message-ID: <1330556992.5881.11.camel@bwh-desktop>
Date:	Wed, 29 Feb 2012 23:09:52 +0000
From:	Ben Hutchings <bhutchings@...arflare.com>
To:	David Miller <davem@...emloft.net>
CC:	<netdev@...r.kernel.org>, <linux-net-drivers@...arflare.com>
Subject: Re: [PATCH net-next] mdio: Export mdio.h to userland

On Wed, 2012-02-29 at 18:02 -0500, David Miller wrote:
> From: Ben Hutchings <bhutchings@...arflare.com>
> Date: Wed, 29 Feb 2012 22:43:48 +0000
> 
> > On Wed, 2012-02-29 at 15:42 -0500, David Miller wrote:
> >> From: Ben Hutchings <bhutchings@...arflare.com>
> >> Date: Wed, 29 Feb 2012 19:12:34 +0000
> >> 
> >> > On Wed, 2012-02-29 at 19:02 +0000, Ben Hutchings wrote:
> >> >> The ID packing/unpacking functions are needed by userland and the
> >> >> register definitions may also be useful there.
> >> > 
> >> > Minor issue with this: mdio_phy_id_is_c45() returns bool, and that's not
> >> > defined by default.  Should I add #include <stdbool.h> or change the
> >> > return type to int for maximum compatibility?
> >> 
> >> I do not see any precedence for including stdbool.h in a kernel header
> >> file.  And I sure as hell am not going to compromise using a correct
> >> type just to make this usable by userspace.
> >> 
> >> I think this is of dubious value, and combined with the bool
> >> complication I'm not going to apply this, sorry.
> > 
> > Without this, userland doing clause 45 MDIO has to duplicate the ID
> > packing definitions.
> 
> Then come up with a real solution to the bool issue.
> 
> But note that changing the bool to an int is not a solution, neither
> is #include <stdbool.h> unless we can reach consensus on lkml that
> this is OK.

I could just move the mdio_phy_id_is_c45(), mdio_phy_id_prtad(),
mdio_phy_id_devad() functions inside #ifdef __KERNEL__ since userland
shouldn't need to unpack PHY IDs.

Ben.

-- 
Ben Hutchings, Staff Engineer, Solarflare
Not speaking for my employer; that's the marketing department's job.
They asked us to note that Solarflare product names are trademarked.

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