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| author | Tejun Heo <tj@kernel.org> | 2008-08-25 19:56:15 +0900 |
|---|---|---|
| committer | Jens Axboe <jens.axboe@oracle.com> | 2008-10-09 08:56:08 +0200 |
| commit | 540eed5637b766bb1e881ef744c42617760b4815 (patch) | |
| tree | 8bdf54967a8290f780216f767291623e67ee7e9b /block/ioctl.c | |
| parent | 074a7aca7afa6f230104e8e65eba3420263714a5 (diff) | |
| download | lwn-540eed5637b766bb1e881ef744c42617760b4815.tar.gz lwn-540eed5637b766bb1e881ef744c42617760b4815.zip | |
block: make partition array dynamic
disk->__part used to be statically allocated to the maximum possible
number of partitions. This patch makes partition array allocation
dynamic. The added overhead is minimal as only real change is one
memory dereference changed to RCU one. This saves both a bit of
memory and cpu cycles iterating through unoccupied slots and makes
increasing partition limit easier.
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'block/ioctl.c')
| -rw-r--r-- | block/ioctl.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/block/ioctl.c b/block/ioctl.c index 64e7c67a64b0..38bee321e1fa 100644 --- a/block/ioctl.c +++ b/block/ioctl.c @@ -30,7 +30,7 @@ static int blkpg_ioctl(struct block_device *bdev, struct blkpg_ioctl_arg __user if (bdev != bdev->bd_contains) return -EINVAL; partno = p.pno; - if (partno <= 0 || partno >= disk_max_parts(disk)) + if (partno <= 0) return -EINVAL; switch (a.op) { case BLKPG_ADD_PARTITION: |