check_disk_size_change

Name:heck_disk_size_change - checks for disk size change and adjusts bdev size

Proto:static void check_disk_size_change(struct gendisk *disk, struct block_device *bdev, bool verbose)

Type:void

Parameter:

Type	Parameter	Name
struct gendisk *	disk
struct block_device *	bdev
bool	verbose

1424

disk_size = get_capacity(disk) << 9

1425

bdev_size = NOTE: in a 32bit arch with a preemptable kernel and* an UP compile the i_size_read/write must be atomic* with respect to the local cpu (unlike with preempt disabled),* but they don't need to be atomic with respect to other cpus like in* true SMP (so they

1426

If disk_size != bdev_size Then

1427

If verbose Then

1428

printk - print a kernel message*@fmt: format string* This is printk(). It can be called from any context. We want it to work.* We try to grab the console_lock. If we succeed, it's easy - we log the* output and call the console drivers

1432

NOTE: unlike i_size_read(), i_size_write() does need locking around it* (normally i_mutex), otherwise on 32bit/SMP an update of i_size_seqcount* can be lost, resulting in subsequent i_size_read() calls spinning forever.

1433

If bdev_size > disk_size Then lush_disk - invalidates all buffer-cache entries on a disk*@bdev: struct block device to be flushed*@kill_dirty: flag to guide handling of dirty inodes* Invalidates all buffer-cache entries on a disk

1436

bd_invalidated = 0

**Caller**
Name	Describe
revalidate_disk	validate_disk - wrapper for lower-level driver's revalidate_disk call-back@disk: struct gendisk to be revalidated This routine is a wrapper for lower-level driver's revalidate_disk* call-backs. It is used to do common pre and post operations needed
bdev_disk_changed

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