[PATCH] (1/7) kdev_t removals

* new function - fsync_bdev() (analog of fsync_dev(), but takes
  struct block_device * instead of kdev_t.  Callers of fsync_dev()
  that have struct block_device in question are using fsync_bdev()
  now.
* old code for fsync_dev(NODEV) had been moved to sys_sync().
  Other callers of fsync_dev(NODEV) are calling sys_sync() now.
* fsync_dev() became a wrapper fro fsync_bdev().
* sync_dev() (not used anywhere in the tree) is gone.
* i2oblock.c had fsync_dev() called in ->release().  Removed.
* s390/block/xparm.c was doing fsync_dev() on its devices in
  cleanup_module().  Removed.

drivers/block/amiflop.c

@@ -1514,7 +1514,7 @@ static int fd_ioctl(struct inode *inode, struct file *filp,
 			rel_fdc();
 			return -EBUSY;
 		}
-		fsync_dev(inode->i_rdev);
+		fsync_bdev(inode->i_bdev);
 		if (fd_motor_on(drive) == 0) {
 			rel_fdc();
 			return -ENODEV;

drivers/char/sysrq.c

@@ -161,7 +161,7 @@ static void go_sync(struct super_block *sb, int remount_flag)
 		}
 		file_list_unlock();
 		DQUOT_OFF(sb);
-		fsync_dev(sb->s_dev);
+		fsync_bdev(sb->s_bdev);
 		flags = MS_RDONLY;
 		if (sb->s_op && sb->s_op->remount_fs) {
 			ret = sb->s_op->remount_fs(sb, &flags, NULL);
@@ -174,7 +174,7 @@ static void go_sync(struct super_block *sb, int remount_flag)
 		} else
 			printk("nothing to do\n");
 	} else { /* Sync only */
-		fsync_dev(sb->s_dev);
+		fsync_bdev(sb->s_bdev);
 		printk("OK\n");
 	}
 	console_loglevel = orig_loglevel;

drivers/macintosh/via-pmu.c

@@ -1434,7 +1434,7 @@ int __openfirmware powerbook_sleep_G3(void)
 	 * BenH: Moved to _after_ sleep request and changed video
 	 * drivers to vmalloc() during sleep request. This way, all
 	 * vmalloc's are done before actual sleep of block drivers */
-	fsync_dev(0);
+	sys_sync();
 
 	/* Sleep can fail now. May not be very robust but useful for debugging */
 	ret = broadcast_sleep(PBOOK_SLEEP_NOW, PBOOK_WAKE);
@@ -1589,7 +1589,7 @@ int __openfirmware powerbook_sleep_Core99(void)
 	 * BenH: Moved to _after_ sleep request and changed video
 	 * drivers to vmalloc() during sleep request. This way, all
 	 * vmalloc's are done before actual sleep of block drivers */
-	fsync_dev(0);
+	sys_sync();
 
 	/* Sleep can fail now. May not be very robust but useful for debugging */
 	ret = broadcast_sleep(PBOOK_SLEEP_NOW, PBOOK_WAKE);
@@ -1764,7 +1764,7 @@ int __openfirmware powerbook_sleep_3400(void)
 	 * BenH: Moved to _after_ sleep request and changed video
 	 * drivers to vmalloc() during sleep request. This way, all
 	 * vmalloc's are done before actual sleep of block drivers */
-	fsync_dev(0);
+	sys_sync();
 
 	/* Sleep can fail now. May not be very robust but useful for debugging */
 	ret = broadcast_sleep(PBOOK_SLEEP_NOW, PBOOK_WAKE);

drivers/macintosh/via-pmu68k.c

@@ -916,7 +916,7 @@ int __openfirmware powerbook_sleep(void)
 	/* Sync the disks. */
 	/* XXX It would be nice to have some way to ensure that
 	 * nobody is dirtying any new buffers while we wait. */
-	fsync_dev(0);
+	sys_sync();
 
 	/* Turn off the display backlight */
 	save_backlight = backlight_enabled;

drivers/md/lvm.c

@@ -878,7 +878,7 @@ static int lvm_blk_ioctl(struct inode *inode, struct file *file,
 
 		P_IOCTL("BLKFLSBUF\n");
 
-		fsync_dev(inode->i_rdev);
+		fsync_bdev(inode->i_bdev);
 		invalidate_buffers(inode->i_rdev);
 		break;
 

drivers/md/md.c

@@ -890,7 +890,8 @@ static mdk_rdev_t * find_rdev_all(kdev_t dev)
 
 static int write_disk_sb(mdk_rdev_t * rdev)
 {
-	struct address_space *mapping = rdev->bdev->bd_inode->i_mapping;
+	struct block_device *bdev = rdev->bdev;
+	struct address_space *mapping = bdev->bd_inode->i_mapping;
 	struct page *page;
 	unsigned offs;
 	int error;
@@ -929,7 +930,7 @@ static int write_disk_sb(mdk_rdev_t * rdev)
 	}
 
 	printk(KERN_INFO "(write) %s's sb offset: %ld\n", partition_name(dev), sb_offset);
-	fsync_dev(dev);
+	fsync_bdev(bdev);
 	page = grab_cache_page(mapping, sb_offset/(PAGE_CACHE_SIZE/BLOCK_SIZE));
 	offs = sb_offset % (PAGE_CACHE_SIZE/BLOCK_SIZE);
 	if (!page)
@@ -946,7 +947,7 @@ static int write_disk_sb(mdk_rdev_t * rdev)
 	UnlockPage(page);
 	wait_on_page(page);
 	page_cache_release(page);
-	fsync_dev(dev);
+	fsync_bdev(bdev);
 skip:
 	return 0;
 unlock:

drivers/message/i2o/i2o_block.c

@@ -1137,9 +1137,6 @@ static int i2ob_release(struct inode *inode, struct file *file)
 	if(!dev->i2odev)
 		return 0;
 
-	/* Sync the device so we don't get errors */
-	fsync_dev(inode->i_rdev);
-
 	if (dev->refcnt <= 0)
 		printk(KERN_ALERT "i2ob_release: refcount(%d) <= 0\n", dev->refcnt);
 	dev->refcnt--;

drivers/mtd/mtdblock.c

@@ -540,7 +540,7 @@ static int mtdblock_ioctl(struct inode * inode, struct file * file,
 		if(!capable(CAP_SYS_ADMIN))
 			return -EACCES;
 #endif
-		fsync_dev(inode->i_rdev);
+		fsync_bdev(inode->i_bdev);
 		invalidate_buffers(inode->i_rdev);
 		down(&mtdblk->cache_sem);
 		write_cached_data(mtdblk);

drivers/mtd/mtdblock_ro.c

@@ -221,7 +221,7 @@ static int mtdblock_ioctl(struct inode * inode, struct file * file,
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,2,0)
 		if(!capable(CAP_SYS_ADMIN))  return -EACCES;
 #endif
-		fsync_dev(inode->i_rdev);
+		fsync_bdev(inode->i_bdev);
 		invalidate_buffers(inode->i_rdev);
 		if (mtd->sync)
 			mtd->sync(mtd);

drivers/mtd/nftlcore.c

@@ -795,7 +795,7 @@ static int nftl_ioctl(struct inode * inode, struct file * file, unsigned int cmd
 	}
 	case BLKFLSBUF:
 		if (!capable(CAP_SYS_ADMIN)) return -EACCES;
-		fsync_dev(inode->i_rdev);
+		fsync_bdev(inode->i_bdev);
 		invalidate_buffers(inode->i_rdev);
 		if (nftl->mtd->sync)
 			nftl->mtd->sync(nftl->mtd);

drivers/s390/block/xpram.c

@@ -654,7 +654,7 @@ int xpram_ioctl (struct inode *inode, struct file *filp,
 			   (u64 *) arg);
 
 	case BLKFLSBUF: /* flush, 0x1261 */
-		fsync_dev(inode->i_rdev);
+		fsync_bdev(inode->i_bdev);
 		if ( capable(CAP_SYS_ADMIN) )invalidate_buffers(inode->i_rdev);
 		return 0;
 
@@ -1191,10 +1191,7 @@ void cleanup_module(void)
 {
 	int i;
 
-	/* first of all, flush it all and reset all the data structures */
-
-	for (i=0; i<xpram_devs; i++)
-		fsync_dev(MKDEV(xpram_major, i)); /* flush the devices */
+	/* first of all, reset all the data structures */
 
 #if (XPRAM_VERSION == 22)
 	blk_dev[major].request_fn = NULL;

fs/buffer.c

@@ -343,36 +343,37 @@ int fsync_no_super(struct block_device *bdev)
 
 int fsync_dev(kdev_t dev)
 {
-	sync_buffers(dev, 0);
-
-	lock_kernel();
-	sync_inodes(dev);
-	if (!kdev_none(dev)) {
-		struct super_block *sb = get_super(dev);
-		if (sb) {
-			DQUOT_SYNC(sb);
-			drop_super(sb);
+	struct block_device *bdev = bdget(kdev_t_to_nr(dev));
+	if (bdev) {
+		int res = fsync_bdev(bdev);
+		bdput(bdev);
+		return res;
 	}
-	} else
-			DQUOT_SYNC(NULL);
-	sync_supers(dev);
-	unlock_kernel();
-
-	return sync_buffers(dev, 1);
+	return 0;
 }
 
-/*
- * There's no real reason to pretend we should
- * ever do anything differently
- */
-void sync_dev(kdev_t dev)
+int fsync_bdev(struct block_device *bdev)
 {
-	fsync_dev(dev);
+	struct super_block *sb = get_super(to_kdev_t(bdev->bd_dev));
+	if (sb) {
+		int res = fsync_super(sb);
+		drop_super(sb);
+		return res;
+	}
+	return fsync_no_super(bdev);
 }
 
 asmlinkage long sys_sync(void)
 {
-	fsync_dev(NODEV);
+	sync_buffers(NODEV, 0);
+
+	lock_kernel();
+	sync_inodes(NODEV);
+	DQUOT_SYNC(NULL);
+	sync_supers(NODEV);
+	unlock_kernel();
+
+	sync_buffers(NODEV, 1);
 	return 0;
 }
 

include/linux/fs.h

@@ -1216,8 +1216,8 @@ extern void sync_inodes(kdev_t);
 extern void sync_unlocked_inodes(void);
 extern void write_inode_now(struct inode *, int);
 extern int sync_buffers(kdev_t, int);
-extern void sync_dev(kdev_t);
 extern int fsync_dev(kdev_t);
+extern int fsync_bdev(struct block_device *);
 extern int fsync_super(struct super_block *);
 extern int fsync_no_super(struct block_device *);
 extern void sync_inodes_sb(struct super_block *);

kernel/ksyms.c

@@ -181,6 +181,7 @@ EXPORT_SYMBOL(invalidate_device);
 EXPORT_SYMBOL(invalidate_inode_pages);
 EXPORT_SYMBOL(truncate_inode_pages);
 EXPORT_SYMBOL(fsync_dev);
+EXPORT_SYMBOL(fsync_bdev);
 EXPORT_SYMBOL(fsync_no_super);
 EXPORT_SYMBOL(permission);
 EXPORT_SYMBOL(vfs_permission);
@@ -311,7 +312,6 @@ EXPORT_SYMBOL(blk_dev);
 EXPORT_SYMBOL(is_read_only);
 EXPORT_SYMBOL(set_device_ro);
 EXPORT_SYMBOL(bmap);
-EXPORT_SYMBOL(sync_dev);
 EXPORT_SYMBOL(devfs_register_partitions);
 EXPORT_SYMBOL(blkdev_open);
 EXPORT_SYMBOL(blkdev_get);