driver core: fix build for CONFIG_BLOCK not enabled

Fix build errors when CONFIG_BLOCK is not enabled:

drivers/base/core.c: In function 'get_device_parent':
drivers/base/core.c:634: error: 'block_class' undeclared (first use in this function)
drivers/base/core.c: In function 'device_add_class_symlinks':
drivers/base/core.c:723: error: 'block_class' undeclared (first use in this function)
drivers/base/core.c: In function 'device_remove_class_symlinks':
drivers/base/core.c:751: error: 'block_class' undeclared (first use in this function)

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/base/core.c b/drivers/base/core.c
index f7f906f0a2f2..2cb49a93b1e6 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -630,12 +630,14 @@ static struct kobject *get_device_parent(struct device *dev,
                 struct kobject *parent_kobj;
                 struct kobject *k;
 
+#ifdef CONFIG_BLOCK
                 /* block disks show up in /sys/block */
                 if (sysfs_deprecated && dev->class == &block_class) {
                         if (parent && parent->class == &block_class)
                                 return &parent->kobj;
                         return &block_class.p->class_subsys.kobj;
                 }
+#endif
 
                 /*
                  * If we have no parent, we live in "virtual".
@@ -719,9 +721,11 @@ static int device_add_class_symlinks(struct device *dev)
                         goto out_subsys;
         }
 
+#ifdef CONFIG_BLOCK
         /* /sys/block has directories and does not need symlinks */
         if (sysfs_deprecated && dev->class == &block_class)
                 return 0;
+#endif
 
         /* link in the class directory pointing to the device */
         error = sysfs_create_link(&dev->class->p->class_subsys.kobj,
@@ -748,8 +752,10 @@ static void device_remove_class_symlinks(struct device *dev)
         if (dev->parent && device_is_not_partition(dev))
                 sysfs_remove_link(&dev->kobj, "device");
         sysfs_remove_link(&dev->kobj, "subsystem");
+#ifdef CONFIG_BLOCK
         if (sysfs_deprecated && dev->class == &block_class)
                 return;
+#endif
         sysfs_delete_link(&dev->class->p->class_subsys.kobj, &dev->kobj, dev_name(dev));
 }