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Xen: consolidate and simplify struct xenbus_driver instantiation

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The 'name', 'owner', and 'mod_name' members are redundant with the
identically named fields in the 'driver' sub-structure. Rather than
switching each instance to specify these fields explicitly, introduce
a macro to simplify this.

Eliminate further redundancy by allowing the drvname argument to
DEFINE_XENBUS_DRIVER() to be blank (in which case the first entry from
the ID table will be used for .driver.name).

Also eliminate the questionable xenbus_register_{back,front}end()
wrappers - their sole remaining purpose was the checking of the
'owner' field, proper setting of which shouldn't be an issue anymore
when the macro gets used.

v2: Restore DRV_NAME for the driver name in xen-pciback.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: Ian Campbell <ian.campbell@citrix.com>
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
This commit is contained in:
Jan Beulich
2011-12-22 09:08:13 +00:00
committed by Konrad Rzeszutek Wilk
parent 2e16341438
commit 73db144b58
13 changed files with 44 additions and 92 deletions
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8
drivers/xen/xenbus/xenbus_probe_backend.c
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@@ -232,15 +232,13 @@ int xenbus_dev_is_online(struct xenbus_device *dev)
}
EXPORT_SYMBOL_GPL(xenbus_dev_is_online);
int __xenbus_register_backend(struct xenbus_driver *drv,
struct module *owner, const char *mod_name)
int xenbus_register_backend(struct xenbus_driver *drv)
{
drv->read_otherend_details = read_frontend_details;
return xenbus_register_driver_common(drv, &xenbus_backend,
owner, mod_name);
return xenbus_register_driver_common(drv, &xenbus_backend);
}
EXPORT_SYMBOL_GPL(__xenbus_register_backend);
EXPORT_SYMBOL_GPL(xenbus_register_backend);
static int backend_probe_and_watch(struct notifier_block *notifier,
unsigned long event,