[merged mm-stable] mm-memory_hotplug-export-mhp_get_default_online_type.patch removed from -mm tree

The quilt patch titled
     Subject: mm/memory_hotplug: export mhp_get_default_online_type
has been removed from the -mm tree.  Its filename was
     mm-memory_hotplug-export-mhp_get_default_online_type.patch

This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

------------------------------------------------------
From: Gregory Price <[email protected]>
Subject: mm/memory_hotplug: export mhp_get_default_online_type
Date: Sun, 12 Jul 2026 11:44:58 -0400

Drivers which may pass hotplug policy down to DAX need MMOP_ symbols and
the mhp_get_default_online_type function for hotplug use cases.

Some drivers (cxl) co-mingle their hotplug and devdax use-cases into the
same driver code, and chose the dax_kmem path as the default driver path -
making it difficult to require hotplug as a predicate to building the
overall driver (it may break other non-hotplug use-cases).

Export mhp_get_default_online_type function to allow these drivers to
build when hotplug is disabled and still use the DAX use case.

In the built-out case we simply return MMOP_OFFLINE as it's
non-destructive.  The internal function can never return -1 either, so we
choose this to allow for defining the function with 'enum mmop'.

Link: https://lore.kernel.org/[email protected]
Signed-off-by: Gregory Price <[email protected]>
Reviewed-by: Dave Jiang <[email protected]>
Reviewed-by: Dan Williams <[email protected]>
Acked-by: David Hildenbrand (Arm) <[email protected]>
Cc: Alison Schofield <[email protected]>
Cc: Danilo Krummrich <[email protected]>
Cc: Greg Kroah-Hartman <[email protected]>
Cc: Hannes Reinecke <[email protected]>
Cc: Liam R. Howlett <[email protected]>
Cc: Lorenzo Stoakes <[email protected]>
Cc: Michal Hocko <[email protected]>
Cc: Mike Rapoport <[email protected]>
Cc: Oscar Salvador <[email protected]>
Cc: Pankaj Gupta <[email protected]>
Cc: "Rafael J. Wysocki" <[email protected]>
Cc: Shuah Khan <[email protected]>
Cc: Suren Baghdasaryan <[email protected]>
Cc: Vishal Verma <[email protected]>
Cc: Vlastimil Babka <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
---

 include/linux/memory_hotplug.h |    2 ++
 mm/memory_hotplug.c            |    1 +
 2 files changed, 3 insertions(+)

--- a/include/linux/memory_hotplug.h~mm-memory_hotplug-export-mhp_get_default_online_type
+++ a/include/linux/memory_hotplug.h
@@ -317,6 +317,8 @@ extern struct zone *zone_for_pfn_range(e
 extern int arch_create_linear_mapping(int nid, u64 start, u64 size,
 				      struct mhp_params *params);
 void arch_remove_linear_mapping(u64 start, u64 size);
+#else
+static inline enum mmop mhp_get_default_online_type(void) { return MMOP_OFFLINE; }
 #endif /* CONFIG_MEMORY_HOTPLUG */
 
 #endif /* __LINUX_MEMORY_HOTPLUG_H */
--- a/mm/memory_hotplug.c~mm-memory_hotplug-export-mhp_get_default_online_type
+++ a/mm/memory_hotplug.c
@@ -241,6 +241,7 @@ enum mmop mhp_get_default_online_type(vo
 
 	return mhp_default_online_type;
 }
+EXPORT_SYMBOL_GPL(mhp_get_default_online_type);
 
 void mhp_set_default_online_type(enum mmop online_type)
 {
_

Patches currently in -mm which might be from [email protected] are