From b09dcf585df959cf26270e65941ea1f79a1345aa Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Wed, 13 Jul 2016 11:03:58 -0700 Subject: [PATCH] NVMe: don't allocate unused nvme_major When alloc_disk(0) is used, the ->major number is ignored. All device numbers are allocated with a major of BLOCK_EXT_MAJOR. So remove all references to nvme_major. [akpm@linux-foundation.org: one unregister_blkdev() was missed] Link: http://lkml.kernel.org/r/20160602064318.4403.93301.stgit@noble Signed-off-by: NeilBrown Reviewed-by: Keith Busch Cc: Jens Axboe Cc: Maxim Levitsky Cc: Greg Kroah-Hartman Signed-off-by: Andrew Morton Signed-off-by: Jens Axboe --- drivers/nvme/host/core.c | 16 +--------------- 1 file changed, 1 insertion(+), 15 deletions(-) diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c index 86a0c66..cf4b750 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -53,9 +53,6 @@ module_param_named(max_retries, nvme_max_retries, uint, 0644); MODULE_PARM_DESC(max_retries, "max number of retries a command may have"); EXPORT_SYMBOL_GPL(nvme_max_retries); -static int nvme_major; -module_param(nvme_major, int, 0); - static int nvme_char_major; module_param(nvme_char_major, int, 0); @@ -1674,8 +1671,6 @@ static void nvme_alloc_ns(struct nvme_ctrl *ctrl, unsigned nsid) blk_queue_logical_block_size(ns->queue, 1 << ns->lba_shift); nvme_set_queue_limits(ctrl, ns->queue); - disk->major = nvme_major; - disk->first_minor = 0; disk->fops = &nvme_fops; disk->private_data = ns; disk->queue = ns->queue; @@ -2085,16 +2080,10 @@ int __init nvme_core_init(void) { int result; - result = register_blkdev(nvme_major, "nvme"); - if (result < 0) - return result; - else if (result > 0) - nvme_major = result; - result = __register_chrdev(nvme_char_major, 0, NVME_MINORS, "nvme", &nvme_dev_fops); if (result < 0) - goto unregister_blkdev; + return result; else if (result > 0) nvme_char_major = result; @@ -2108,8 +2097,6 @@ int __init nvme_core_init(void) unregister_chrdev: __unregister_chrdev(nvme_char_major, 0, NVME_MINORS, "nvme"); - unregister_blkdev: - unregister_blkdev(nvme_major, "nvme"); return result; } @@ -2117,7 +2104,6 @@ void nvme_core_exit(void) { class_destroy(nvme_class); __unregister_chrdev(nvme_char_major, 0, NVME_MINORS, "nvme"); - unregister_blkdev(nvme_major, "nvme"); } MODULE_LICENSE("GPL"); -- 2.7.4