Subject: Wrapper for lower-level revalidate_disk routines. From: Andrew Patterson Date: Thu Oct 9 08:56:12 2008 +0200: Git: 0c002c2f74e10baa9021d3ecc50585c6eafea568 References: FATE#302348,FATE#303786 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: Andrew Patterson Signed-off-by: Jens Axboe Signed-off-by: Hannes Reinecke --- fs/block_dev.c | 21 +++++++++++++++++++++ include/linux/fs.h | 1 + 2 files changed, 22 insertions(+) --- a/fs/block_dev.c +++ b/fs/block_dev.c @@ -868,6 +868,27 @@ struct block_device *open_by_devnum(dev_ 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 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -1742,6 +1742,7 @@ extern int fs_may_remount_ro(struct supe */ #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);