linux-kernel - Re: [PATCH] sysfs: return correct error code on unimplemented mmap()

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Message-ID: <20131028163549.GC4797@kroah.com>
Date:	Mon, 28 Oct 2013 09:35:49 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	Vladimir Zapolskiy <vladimir_zapolskiy@...tor.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] sysfs: return correct error code on unimplemented mmap()

On Mon, Oct 28, 2013 at 06:28:30PM +0200, Vladimir Zapolskiy wrote:
> Both POSIX.1-2008 and Linux Programmer's Manual have a dedicated return
> error code for a case, when a file doesn't support mmap(), it's ENODEV.
> 
> This change replaces overloaded EINVAL with ENODEV in a situation
> described above for sysfs binary files.
> 
> Signed-off-by: Vladimir Zapolskiy <vladimir_zapolskiy@...tor.com>
> Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

Is this a problem in linux-next or 3.12-rc7 and older kernels?  What
userspace tool is breaking here?

thanks,

greg k-h
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