提交 0c002c2f 编写于 作者: A Andrew Patterson 提交者: Jens Axboe

Wrapper for lower-level revalidate_disk routines.

This is a wrapper for the lower-level revalidate_disk call-backs such
as sd_revalidate_disk(). It allows us to perform pre and post
operations when calling them.

We will use this wrapper in a later patch to adjust block device sizes
after an online resize (a _post_ operation).
Signed-off-by: NAndrew Patterson <andrew.patterson@hp.com>
Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
上级 243294da
......@@ -852,6 +852,27 @@ struct block_device *open_by_devnum(dev_t dev, unsigned mode)
EXPORT_SYMBOL(open_by_devnum);
/**
* revalidate_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
* for all revalidate_disk operations.
*/
int revalidate_disk(struct gendisk *disk)
{
int ret = 0;
if (disk->fops->revalidate_disk)
ret = disk->fops->revalidate_disk(disk);
return ret;
}
EXPORT_SYMBOL(revalidate_disk);
/*
* This routine checks whether a removable media has been changed,
* and invalidates all buffer-cache-entries in that case. This
......
......@@ -1722,6 +1722,7 @@ extern int fs_may_remount_ro(struct super_block *);
*/
#define bio_data_dir(bio) ((bio)->bi_rw & 1)
extern int revalidate_disk(struct gendisk *);
extern int check_disk_change(struct block_device *);
extern int __invalidate_device(struct block_device *);
extern int invalidate_partition(struct gendisk *, int);
......
Markdown is supported
0% .
You are about to add 0 people to the discussion. Proceed with caution.
先完成此消息的编辑!
想要评论请 注册