linux-kernel - [PATCH 4/4] void unregister_blkdev

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Date:	Sat, 30 Jun 2007 12:17:02 +0900
From:	Akinobu Mita <akinobu.mita@...il.com>
To:	linux-kernel@...r.kernel.org, Jens Axboe <jens.axboe@...cle.com>
Subject: [PATCH 4/4] void unregister_blkdev - make void

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

Cc: Jens Axboe <jens.axboe@...cle.com>
Signed-off-by: Akinobu Mita <akinobu.mita@...il.com>

---
 block/genhd.c      |    7 +------
 include/linux/fs.h |    2 +-
 2 files changed, 2 insertions(+), 7 deletions(-)

Index: 2.6-mm/block/genhd.c
===================================================================
--- 2.6-mm.orig/block/genhd.c
+++ 2.6-mm/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
 			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);
Index: 2.6-mm/include/linux/fs.h
===================================================================
--- 2.6-mm.orig/include/linux/fs.h
+++ 2.6-mm/include/linux/fs.h
@@ -1553,7 +1553,7 @@ 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);
-
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