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authorTejun Heo <tj@kernel.org>2008-09-03 09:01:48 +0200
committerJens Axboe <jens.axboe@oracle.com>2008-10-09 08:56:05 +0200
commitf331c0296f2a9fee0d396a70598b954062603015 (patch)
treef74c467d58940131d97d90c4ea549843185e6ef0 /block/blk-merge.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 'block/blk-merge.c')
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