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pmem: don't allocate unused major device number 

When alloc_disk(0) or alloc_disk-node(0, XX) is used, the ->major
number is completely ignored:  all devices are allocated with a
major of BLOCK_EXT_MAJOR.

So there is no point allocating pmem_major.

Signed-off-by: NeilBrown <neilb@suse.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
NeilBrown 2016-03-09 09:21:54 +11:00 committed by Dan Williams
parent af1996ef59
commit 55155291b3
1 changed files with 1 additions and 18 deletions
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19
drivers/nvdimm/pmem.c
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@ -50,8 +50,6 @@ struct pmem_device {
struct badblocks bb;
};
static int pmem_major;
static bool is_bad_pmem(struct badblocks *bb, sector_t sector, unsigned int len)
{
if (bb->count) {
@ -231,8 +229,6 @@ static int pmem_attach_disk(struct device *dev,
return -ENOMEM;
}
disk->major = pmem_major;
disk->first_minor = 0;
disk->fops = &pmem_fops;
disk->private_data = pmem;
disk->queue = pmem->pmem_queue;
@ -579,26 +575,13 @@ static struct nd_device_driver nd_pmem_driver = {
static int __init pmem_init(void)
{
int error;
pmem_major = register_blkdev(0, "pmem");
if (pmem_major < 0)
return pmem_major;
error = nd_driver_register(&nd_pmem_driver);
if (error) {
unregister_blkdev(pmem_major, "pmem");
return error;
}
return 0;
return nd_driver_register(&nd_pmem_driver);
}
module_init(pmem_init);
static void pmem_exit(void)
{
driver_unregister(&nd_pmem_driver.drv);
unregister_blkdev(pmem_major, "pmem");
}
module_exit(pmem_exit);