From: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Date: Thu, 6 Jun 2013 07:49:09 +0000 (+0200)
Subject: s390/cio: Make /dev/chsc a single-open device
X-Git-Tag: omap-for-v3.11/fixes-for-merge-window~39^2~29
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7a9cc6e18b8fe751a41349b188dd468a8317192a;p=pandora-kernel.git

s390/cio: Make /dev/chsc a single-open device

In order to allow serialization of dynamic I/O with this patch
the /dev/chsc character device can only be accessed by one
single opener. Any subsequent open calls are rejected with EBUSY.

Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
---

Reading git-diff-tree failed