+ mm-change-type-of-state-in-struct-memory_block.patch added to mm-new branch

[Andrew Morton <akpm@linux-foundation.org>]

The patch titled
     Subject: mm: change type of state in struct memory_block
has been added to the -mm mm-new branch.  Its filename is
     mm-change-type-of-state-in-struct-memory_block.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-change-type-of-state-in-struct-memory_block.patch

This patch will later appear in the mm-new branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Note, mm-new is a provisional staging ground for work-in-progress
patches, and acceptance into mm-new is a notification for others take
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------------------------------------------------------
From: Israel Batista <linux@israelbatista.dev.br>
Subject: mm: change type of state in struct memory_block
Date: Wed, 29 Oct 2025 19:56:30 +0000 (UTC)

The state of a memory block should be restricted to values specified in
the documentation of the memory hotplug API.  However, since the state
field in the memory_block struct was defined as an unsigned long, this
restriction was not enforced at compile time.

With the introduction of the enum memory_block_state, it is now possible
to incorporate the desired semantics in the field declaration and enforce
these restrictions at compile time.

Link: https://lkml.kernel.org/r/20251029195617.2210700-3-linux@israelbatista.dev.br
Signed-off-by: Israel Batista <linux@israelbatista.dev.br>
Cc: David Hildenbrand <david@redhat.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Omar Sandoval <osandov@osandov.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 drivers/base/memory.c  |    2 +-
 include/linux/memory.h |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/base/memory.c~mm-change-type-of-state-in-struct-memory_block
+++ a/drivers/base/memory.c
@@ -198,7 +198,7 @@ static ssize_t state_show(struct device
 		break;
 	default:
 		WARN_ON(1);
-		return sysfs_emit(buf, "ERROR-UNKNOWN-%ld\n", mem->state);
+		return sysfs_emit(buf, "ERROR-UNKNOWN-%d\n", mem->state);
 	}
 
 	return sysfs_emit(buf, "%s\n", output);
--- a/include/linux/memory.h~mm-change-type-of-state-in-struct-memory_block
+++ a/include/linux/memory.h
@@ -78,7 +78,7 @@ enum memory_block_state {
 
 struct memory_block {
 	unsigned long start_section_nr;
-	unsigned long state;		/* serialized by the dev->lock */
+	enum memory_block_state state; /* serialized by the dev->lock */
 	int online_type;		/* for passing data to online routine */
 	int nid;			/* NID for this memory block */
 	/*
_

Patches currently in -mm which might be from linux@israelbatista.dev.br are

mm-convert-memory-block-states-mem_-macros-to-enum.patch
mm-change-type-of-state-in-struct-memory_block.patch
mm-change-type-of-parameter-for-memory_notify.patch