Commit 55155291 authored by NeilBrown's avatar NeilBrown Committed by Dan Williams
Browse files

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: default avatarNeilBrown <neilb@suse.com>
Signed-off-by: default avatarDan Williams <dan.j.williams@intel.com>
parent af1996ef

drivers/nvdimm/pmem.c

+1 −18
Original line number Diff line number Diff line
@@ -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);

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