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dax/kmem: resolve default online type at probe time

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Resolve the default online type in kmem at probe time explicitly instead
of implicitly inheriting the system default by calling
add_memory_driver_managed().

No behavioral change at this point (still system default).

Link: https://lore.kernel.org/20260712154505.3564379-8-gourry@gourry.net
Signed-off-by: Gregory Price <gourry@gourry.net>
Cc: Alison Schofield <alison.schofield@intel.com>
Cc: Danilo Krummrich <dakr@kernel.org>
Cc: Dave Jiang <dave.jiang@intel.com>
Cc: David Hildenbrand (Arm) <david@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Hannes Reinecke <hare@suse.de>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Pankaj Gupta <pankaj.gupta@amd.com>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vishal Verma <vishal.l.verma@intel.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Gregory Price
2026-07-12 11:45:01 -04:00
committed by Andrew Morton
parent c17ba40c37
commit 496a4cd658
1 changed files with 4 additions and 2 deletions
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6
drivers/dax/kmem.c
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@@ -73,6 +73,7 @@ static int dev_dax_kmem_probe(struct dev_dax *dev_dax)
mhp_t mhp_flags;
int numa_node;
int adist = MEMTIER_DEFAULT_DAX_ADISTANCE;
int online_type = mhp_get_default_online_type();
/*
* Ensure good NUMA information for the persistent memory.
@@ -172,8 +173,9 @@ static int dev_dax_kmem_probe(struct dev_dax *dev_dax)
* Ensure that future kexec'd kernels will not treat
* this as RAM automatically.
*/
rc = add_memory_driver_managed(data->mgid, range.start,
range_len(&range), kmem_name, mhp_flags);
rc = __add_memory_driver_managed(data->mgid, range.start,
range_len(&range), kmem_name, mhp_flags,
online_type);
if (rc) {
dev_warn(dev, "mapping%d: %#llx-%#llx memory add failed\n",