[PATCH] s390: move s390_root_dev_* out of the cio layer

Extract the s390_root_dev_* functions from the common I/O layer as they are
also used by non-ccw device drivers.

Signed-off-by: Carsten Otte <cotte@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 53 insertions, 0 deletions

diff --git a/drivers/s390/s390_rdev.c b/drivers/s390/s390_rdev.c
new file mode 100644
index 000000000000..566cc3d185b6
--- /dev/null
+++ b/drivers/s390/s390_rdev.c
@@ -0,0 +1,53 @@
+/*
+ *  drivers/s390/s390_rdev.c
+ *  s390 root device
+ *   $Revision: 1.2 $
+ *
+ *    Copyright (C) 2002, 2005 IBM Deutschland Entwicklung GmbH,
+ *                       IBM Corporation
+ *    Author(s): Cornelia Huck (cohuck@de.ibm.com)
+ *                Carsten Otte  (cotte@de.ibm.com)
+ */
+
+#include <linux/slab.h>
+#include <linux/err.h>
+#include <linux/device.h>
+#include <asm/s390_rdev.h>
+
+static void
+s390_root_dev_release(struct device *dev)
+{
+        kfree(dev);
+}
+
+struct device *
+s390_root_dev_register(const char *name)
+{
+        struct device *dev;
+        int ret;
+
+        if (!strlen(name))
+                return ERR_PTR(-EINVAL);
+        dev = kmalloc(sizeof(struct device), GFP_KERNEL);
+        if (!dev)
+                return ERR_PTR(-ENOMEM);
+        memset(dev, 0, sizeof(struct device));
+        strncpy(dev->bus_id, name, min(strlen(name), (size_t)BUS_ID_SIZE));
+        dev->release = s390_root_dev_release;
+        ret = device_register(dev);
+        if (ret) {
+                kfree(dev);
+                return ERR_PTR(ret);
+        }
+        return dev;
+}
+
+void
+s390_root_dev_unregister(struct device *dev)
+{
+        if (dev)
+                device_unregister(dev);
+}
+
+EXPORT_SYMBOL(s390_root_dev_register);
+EXPORT_SYMBOL(s390_root_dev_unregister);