From: John Anthony Kazos Jr. <[EMAIL PROTECTED]>
Add static inline function get_sect_count to include/linux/genhd.h to
complement get_start_sect. Returns sector_t capacity of block device
whether it is whole or a partition.
Signed-off-by: John Anthony Kazos Jr. <[EMAIL PROTECTED]>
---
This will be useful for fill_super functions of filesystems with online
resizing for checks against recorded and actual device size.
get_start_sect and get_sect_count are helper functions useful to keep
things from breaking in case the block_device structure decides to change.
Applied against Linux v2.6.20.6.
--- linux-2.6.20.6-orig/include/linux/genhd.h 2007-04-06 16:02:48.000000000
-0400
+++ linux-2.6.20.6-mod/include/linux/genhd.h 2007-04-07 11:58:55.000000000
-0400
@@ -244,6 +244,10 @@ static inline sector_t get_start_sect(st
{
return bdev->bd_contains == bdev ? 0 : bdev->bd_part->start_sect;
}
+static inline sector_t get_sect_count(struct block_device *bdev)
+{
+ return bdev->bd_contains == bdev ? bdev->bd_disk->capacity :
bdev->bd_part->nr_sects;
+}
static inline sector_t get_capacity(struct gendisk *disk)
{
return disk->capacity;
-
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