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author | Tejun Heo <tj@kernel.org> | 2008-09-03 09:01:48 +0200 |
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committer | Jens Axboe <jens.axboe@oracle.com> | 2008-10-09 08:56:05 +0200 |
commit | f331c0296f2a9fee0d396a70598b954062603015 (patch) | |
tree | f74c467d58940131d97d90c4ea549843185e6ef0 /drivers/mmc/card | |
parent | cf771cb5a7b716f3f9e532fd42a1e3a0a75adec5 (diff) | |
download | linux-f331c0296f2a9fee0d396a70598b954062603015.tar.gz |
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/mmc/card')
-rw-r--r-- | drivers/mmc/card/block.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c index ebc8b9d77613..97156b689e82 100644 --- a/drivers/mmc/card/block.c +++ b/drivers/mmc/card/block.c @@ -83,7 +83,7 @@ static void mmc_blk_put(struct mmc_blk_data *md) mutex_lock(&open_lock); md->usage--; if (md->usage == 0) { - int devidx = md->disk->first_minor >> MMC_SHIFT; + int devidx = MINOR(disk_devt(md->disk)) >> MMC_SHIFT; __clear_bit(devidx, dev_use); put_disk(md->disk); |