From 0b4af90344ac4d5ce7defcb39891c773da969132 Mon Sep 17 00:00:00 2001
From: "David Hildenbrand (Arm)" <david@kernel.org>
Date: Mon, 28 Sep 2026 10:48:21 +0200
Subject: [PATCH] vmcoreinfo: export SECTION_HAS_MEM_MAP

The crash tool currently hardcodes SECTION_HAS_MEM_MAP, and makedumpfile
needs similar information (although still relying on
SECTION_MARKED_PRESENT, it should switch to SECTION_HAS_MEM_MAP).

Let's just export the value instead, so tools that work on vmcoreinfo
will not have to guess.

Link: https://lore.kernel.org/20260928-section_has_mem_map-v1-1-4129f6ba2838@kernel.org
Signed-off-by: David Hildenbrand (Arm) <david@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Baoquan He <baoquan.he@linux.dev>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Reviewed-by: Bradley Morgan <brads@mainlining.org>
Cc: David Carlier <devnexen@gmail.com>
Cc: Dave Young <ruirui.yang@linux.dev>
Cc: Kazuhito Hagio <kazuhito.hagio@nec.com>
---
 kernel/vmcore_info.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/kernel/vmcore_info.c b/kernel/vmcore_info.c
index 5a417f8a922a..7833a36064a8 100644
--- a/kernel/vmcore_info.c
+++ b/kernel/vmcore_info.c
@@ -182,6 +182,7 @@ static int __init crash_save_vmcoreinfo_init(void)
 	VMCOREINFO_STRUCT_SIZE(mem_section);
 	VMCOREINFO_OFFSET(mem_section, section_mem_map);
 	VMCOREINFO_NUMBER(SECTION_SIZE_BITS);
+	VMCOREINFO_NUMBER(SECTION_HAS_MEM_MAP);
 	VMCOREINFO_NUMBER(MAX_PHYSMEM_BITS);
 #endif
 	VMCOREINFO_STRUCT_SIZE(page);