unregister_blkdev(): return void

Put WARN_ON and fixed all callers of unregister_blkdev().  Now we can make
unregister_blkdev return void.

Cc: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/block/genhd.c b/block/genhd.c
index 7f71b2c..3af1e7a 100644 (file)
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -108,13 +108,11 @@ out:
 
 EXPORT_SYMBOL(register_blkdev);
 
-/* todo: make void - error printk here */
-int unregister_blkdev(unsigned int major, const char *name)
+void unregister_blkdev(unsigned int major, const char *name)
 {
        struct blk_major_name **n;
        struct blk_major_name *p = NULL;
        int index = major_to_index(major);
-       int ret = 0;
 
        mutex_lock(&block_subsys_lock);
        for (n = &major_names[index]; *n; n = &(*n)->next)
@@ -122,15 +120,12 @@ int unregister_blkdev(unsigned int major, const char *name)
                        break;
        if (!*n || strcmp((*n)->name, name)) {
                WARN_ON(1);
-               ret = -EINVAL;
        } else {
                p = *n;
                *n = p->next;
        }
        mutex_unlock(&block_subsys_lock);
        kfree(p);
-
-       return ret;
 }
 
 EXPORT_SYMBOL(unregister_blkdev);

diff --git a/include/linux/fs.h b/include/linux/fs.h
index b3a9f0d..aa74f7d 100644 (file)
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1527,7 +1527,7 @@ extern void putname(const char *name);
 
 #ifdef CONFIG_BLOCK
 extern int register_blkdev(unsigned int, const char *);
-extern int unregister_blkdev(unsigned int, const char *);
+extern void unregister_blkdev(unsigned int, const char *);
 extern struct block_device *bdget(dev_t);
 extern void bd_set_size(struct block_device *, loff_t size);
 extern void bd_forget(struct inode *inode);