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/openbmc/linux/drivers/s390/cio/
H A Dchsc_sch.cdiff 7a9cc6e18b8fe751a41349b188dd468a8317192a Thu Jun 06 02:49:09 CDT 2013 Michael Holzheu <holzheu@linux.vnet.ibm.com> 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>