Merge tag 'for-6.17/block-20250728' of git://git.kernel.dk/linux

Pull block updates from Jens Axboe:

 - MD pull request via Yu:
      - call del_gendisk synchronously (Xiao)
      - cleanup unused variable (John)
      - cleanup workqueue flags (Ryo)
      - fix faulty rdev can't be removed during resync (Qixing)

 - NVMe pull request via Christoph:
      - try PCIe function level reset on init failure (Keith Busch)
      - log TLS handshake failures at error level (Maurizio Lombardi)
      - pci-epf: do not complete commands twice if nvmet_req_init()
        fails (Rick Wertenbroek)
      - misc cleanups (Alok Tiwari)

 - Removal of the pktcdvd driver

   This has been more than a decade coming at this point, and some
   recently revealed breakages that had it causing issues even for cases
   where it isn't required made me re-pull the trigger on this one. It's
   known broken and nobody has stepped up to maintain the code

 - Series for ublk supporting batch commands, enabling the use of
   multishot where appropriate

 - Speed up ublk exit handling

 - Fix for the two-stage elevator fixing which could leak data

 - Convert NVMe to use the new IOVA based API

 - Increase default max transfer size to something more reasonable

 - Series fixing write operations on zoned DM devices

 - Add tracepoints for zoned block device operations

 - Prep series working towards improving blk-mq queue management in the
   presence of isolated CPUs

 - Don't allow updating of the block size of a loop device that is
   currently under exclusively ownership/open

 - Set chunk sectors from stacked device stripe size and use it for the
   atomic write size limit

 - Switch to folios in bcache read_super()

 - Fix for CD-ROM MRW exit flush handling

 - Various tweaks, fixes, and cleanups

* tag 'for-6.17/block-20250728' of git://git.kernel.dk/linux: (94 commits)
  block: restore two stage elevator switch while running nr_hw_queue update
  cdrom: Call cdrom_mrw_exit from cdrom_release function
  sunvdc: Balance device refcount in vdc_port_mpgroup_check
  nvme-pci: try function level reset on init failure
  dm: split write BIOs on zone boundaries when zone append is not emulated
  block: use chunk_sectors when evaluating stacked atomic write limits
  dm-stripe: limit chunk_sectors to the stripe size
  md/raid10: set chunk_sectors limit
  md/raid0: set chunk_sectors limit
  block: sanitize chunk_sectors for atomic write limits
  ilog2: add max_pow_of_two_factor()
  nvmet: pci-epf: Do not complete commands twice if nvmet_req_init() fails
  nvme-tcp: log TLS handshake failures at error level
  docs: nvme: fix grammar in nvme-pci-endpoint-target.rst
  nvme: fix typo in status code constant for self-test in progress
  nvmet: remove redundant assignment of error code in nvmet_ns_enable()
  nvme: fix incorrect variable in io cqes error message
  nvme: fix multiple spelling and grammar issues in host drivers
  block: fix blk_zone_append_update_request_bio() kernel-doc
  md/raid10: fix set but not used variable in sync_request_write()
  ...

1 files changed, 8 insertions, 8 deletions

diff --git a/lib/group_cpus.c b/lib/group_cpus.c
index 18d43a406114..6d08ac05f371 100644
--- a/lib/group_cpus.c
+++ b/lib/group_cpus.c
@@ -332,9 +332,11 @@ static int __group_cpus_evenly(unsigned int startgrp, unsigned int numgrps,
 /**
  * group_cpus_evenly - Group all CPUs evenly per NUMA/CPU locality
  * @numgrps: number of groups
+ * @nummasks: number of initialized cpumasks
  *
  * Return: cpumask array if successful, NULL otherwise. And each element
- * includes CPUs assigned to this group
+ * includes CPUs assigned to this group. nummasks contains the number
+ * of initialized masks which can be less than numgrps.
  *
  * Try to put close CPUs from viewpoint of CPU and NUMA locality into
  * same group, and run two-stage grouping:
@@ -344,7 +346,7 @@ static int __group_cpus_evenly(unsigned int startgrp, unsigned int numgrps,
  * We guarantee in the resulted grouping that all CPUs are covered, and
  * no same CPU is assigned to multiple groups
  */
-struct cpumask *group_cpus_evenly(unsigned int numgrps)
+struct cpumask *group_cpus_evenly(unsigned int numgrps, unsigned int *nummasks)
 {
 	unsigned int curgrp = 0, nr_present = 0, nr_others = 0;
 	cpumask_var_t *node_to_cpumask;
@@ -389,7 +391,7 @@ struct cpumask *group_cpus_evenly(unsigned int numgrps)
 	ret = __group_cpus_evenly(curgrp, numgrps, node_to_cpumask,
 				  npresmsk, nmsk, masks);
 	if (ret < 0)
-		goto fail_build_affinity;
+		goto fail_node_to_cpumask;
 	nr_present = ret;
 
 	/*
@@ -408,10 +410,6 @@ struct cpumask *group_cpus_evenly(unsigned int numgrps)
 	if (ret >= 0)
 		nr_others = ret;
 
- fail_build_affinity:
-	if (ret >= 0)
-		WARN_ON(nr_present + nr_others < numgrps);
-
  fail_node_to_cpumask:
 	free_node_to_cpumask(node_to_cpumask);
 
@@ -424,10 +422,11 @@ struct cpumask *group_cpus_evenly(unsigned int numgrps)
 		kfree(masks);
 		return NULL;
 	}
+	*nummasks = min(nr_present + nr_others, numgrps);
 	return masks;
 }
 #else /* CONFIG_SMP */
-struct cpumask *group_cpus_evenly(unsigned int numgrps)
+struct cpumask *group_cpus_evenly(unsigned int numgrps, unsigned int *nummasks)
 {
 	struct cpumask *masks;
 
@@ -440,6 +439,7 @@ struct cpumask *group_cpus_evenly(unsigned int numgrps)
 
 	/* assign all CPUs(cpu 0) to the 1st group only */
 	cpumask_copy(&masks[0], cpu_possible_mask);
+	*nummasks = 1;
 	return masks;
 }
 #endif /* CONFIG_SMP */