[PATCH] dm: block size bug with 64 bit devs

With 32 bit sector_t the block device size _in bytes_ is also cut to
32 bit in __set_size when the block device is mount (a filesystem
mounted). The argument should be cast to loff_t before expanding the
sector count to a byte count and calling i_size_write.

[Christophe Saout]

diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index c116277d664cc73adc148ec743afe0d66b89752e..a96f07c3cdea53f7deac1fecf0816e91e4d862bf 100644 (file)
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -674,7 +674,7 @@ static void __set_size(struct gendisk *disk, sector_t size)
        bdev = bdget_disk(disk, 0);
        if (bdev) {
                down(&bdev->bd_inode->i_sem);
-               i_size_write(bdev->bd_inode, size << SECTOR_SHIFT);
+               i_size_write(bdev->bd_inode, (loff_t)size << SECTOR_SHIFT);
                up(&bdev->bd_inode->i_sem);
                bdput(bdev);
        }