linux-kernel - mmap for /proc/vmcore broken since 3.12-rc1

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

Hello Alexey,

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

commit c4fe24485729fc2cbff324c111e67a1cc2f9adea
Author: Alexey Dobriyan <adobriyan@...il.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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