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authorTejun Heo <tj@kernel.org>2008-09-03 03:01:48 -0400
committerJens Axboe <jens.axboe@oracle.com>2008-10-09 02:56:05 -0400
commitf331c0296f2a9fee0d396a70598b954062603015 (patch)
treef74c467d58940131d97d90c4ea549843185e6ef0 /drivers/md/dm-stripe.c
parentcf771cb5a7b716f3f9e532fd42a1e3a0a75adec5 (diff)
block: don't depend on consecutive minor space
* Implement disk_devt() and part_devt() and use them to directly access devt instead of computing it from ->major and ->first_minor. Note that all references to ->major and ->first_minor outside of block layer is used to determine devt of the disk (the part0) and as ->major and ->first_minor will continue to represent devt for the disk, converting these users aren't strictly necessary. However, convert them for consistency. * Implement disk_max_parts() to avoid directly deferencing genhd->minors. * Update bdget_disk() such that it doesn't assume consecutive minor space. * Move devt computation from register_disk() to add_disk() and make it the only one (all other usages use the initially determined value). These changes clean up the code and will help disk->part dereference fix and extended block device numbers. Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'drivers/md/dm-stripe.c')
-rw-r--r--drivers/md/dm-stripe.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/md/dm-stripe.c b/drivers/md/dm-stripe.c
index 4de90ab3968b..b745d8ac625b 100644
--- a/drivers/md/dm-stripe.c
+++ b/drivers/md/dm-stripe.c
@@ -284,8 +284,8 @@ static int stripe_end_io(struct dm_target *ti, struct bio *bio,
284 284
285 memset(major_minor, 0, sizeof(major_minor)); 285 memset(major_minor, 0, sizeof(major_minor));
286 sprintf(major_minor, "%d:%d", 286 sprintf(major_minor, "%d:%d",
287 bio->bi_bdev->bd_disk->major, 287 MAJOR(disk_devt(bio->bi_bdev->bd_disk)),
288 bio->bi_bdev->bd_disk->first_minor); 288 MINOR(disk_devt(bio->bi_bdev->bd_disk)));
289 289
290 /* 290 /*
291 * Test to see which stripe drive triggered the event 291 * Test to see which stripe drive triggered the event