[S390] cio: kernel stack overflow.

Use different kind of assignment to make sure gcc doesn't create code
that creates temp variables on the stack, assigns values to it and
copies the content of the whole temp variable to the destination.
This reduces stack usage of e.g. ccwgroup_driver_register from 976
to 48 bytes instead.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

1 files changed, 5 insertions, 9 deletions

diff --git a/drivers/s390/cio/ccwgroup.c b/drivers/s390/cio/ccwgroup.c
index 3cba6c9..38954f5 100644
--- a/drivers/s390/cio/ccwgroup.c
+++ b/drivers/s390/cio/ccwgroup.c
@@ -183,11 +183,9 @@ ccwgroup_create(struct device *root,
 
 	gdev->creator_id = creator_id;
 	gdev->count = argc;
-	gdev->dev = (struct device ) {
-		.bus = &ccwgroup_bus_type,
-		.parent = root,
-		.release = ccwgroup_release,
-	};
+	gdev->dev.bus = &ccwgroup_bus_type;
+	gdev->dev.parent = root;
+	gdev->dev.release = ccwgroup_release;
 
 	snprintf (gdev->dev.bus_id, BUS_ID_SIZE, "%s",
 			gdev->cdev[0]->dev.bus_id);
@@ -391,10 +389,8 @@ int
 ccwgroup_driver_register (struct ccwgroup_driver *cdriver)
 {
 	/* register our new driver with the core */
-	cdriver->driver = (struct device_driver) {
-		.bus = &ccwgroup_bus_type,
-		.name = cdriver->name,
-	};
+	cdriver->driver.bus = &ccwgroup_bus_type;
+	cdriver->driver.name = cdriver->name;
 
 	return driver_register(&cdriver->driver);
 }