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Date: Wed, 2 Oct 2013 14:03:56 +0200
From: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Subject: mmap for /proc/vmcore broken since 3.12-rc1
Message-ID: <20131002140356.63706540@holzheu>
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To: Alexey Dobriyan <adobriyan@gmail.com>
Cc: kexec@lists.infradead.org, linux-kernel@vger.kernel.org, Jan Willeke <willeke@de.ibm.com>, HATAYAMA Daisuke <d.hatayama@jp.fujitsu.com>, "David S. Miller" <davem@davemloft.net>, Vivek Goyal <vgoyal@redhat.com>

Hello Alexey,

Looks like the following commit broke mmap for /proc/vmcore:

commit c4fe24485729fc2cbff324c111e67a1cc2f9adea
Author: Alexey Dobriyan <adobriyan@gmail.com>
Date:   Tue Aug 20 22:17:24 2013 +0300

    sparc: fix PCI device proc file mmap(2)

Because /proc/vmcore (fs/proc/vmcore.c) does not implement the
get_unmapped_area() fops function mmap now always returns EIO.

Michael


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