From: Kefeng Wang <wangkefeng.wang@huawei.com>
Date: Mon, 12 Jan 2026 15:09:54 +0000 (+0800)
Subject: mm: hugetlb_cma: mark hugetlb_cma{_only} as __ro_after_init
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ae85e5610813c9904ea4a111bf47edd1940ebf63;p=thirdparty%2Fkernel%2Flinux.git

mm: hugetlb_cma: mark hugetlb_cma{_only} as __ro_after_init

hugetlb_cma and hugetlb_cma_only are initialized once during init and
never changed.

Link: https://lkml.kernel.org/r/20260112150954.1802953-6-wangkefeng.wang@huawei.com
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Acked-by: Zi Yan <ziy@nvidia.com>
Acked-by: Muchun Song <muchun.song@linux.dev>
Cc: Brendan Jackman <jackmanb@google.com>
Cc: David Hildenbrand <david@kernel.org>
Cc: Jane Chu <jane.chu@oracle.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Sidhartha Kumar <sidhartha.kumar@oracle.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

diff --git a/mm/hugetlb_cma.c b/mm/hugetlb_cma.c
index d8fa93825992f..f83ae4998990f 100644
--- a/mm/hugetlb_cma.c
+++ b/mm/hugetlb_cma.c
@@ -13,9 +13,9 @@
 #include "hugetlb_cma.h"
 
 
-static struct cma *hugetlb_cma[MAX_NUMNODES];
+static struct cma *hugetlb_cma[MAX_NUMNODES] __ro_after_init;
 static unsigned long hugetlb_cma_size_in_node[MAX_NUMNODES] __initdata;
-static bool hugetlb_cma_only;
+static bool hugetlb_cma_only __ro_after_init;
 static unsigned long hugetlb_cma_size __ro_after_init;
 
 void hugetlb_cma_free_frozen_folio(struct folio *folio)