[merged mm-stable] crash_core-export-vmemmap-when-config_sparsemem_vmemmap-is-enabled.patch removed from -mm tree

[merged mm-stable] crash_core-export-vmemmap-when-config_sparsemem_vmemmap-is-enabled.patch removed from -mm tree

[Andrew Morton]

The quilt patch titled
     Subject: crash_core: export vmemmap when CONFIG_SPARSEMEM_VMEMMAP is enabled
has been removed from the -mm tree.  Its filename was
     crash_core-export-vmemmap-when-config_sparsemem_vmemmap-is-enabled.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: Huang Shijie <shijie@os.amperecomputing.com>
Subject: crash_core: export vmemmap when CONFIG_SPARSEMEM_VMEMMAP is enabled
Date: Tue, 27 Feb 2024 09:49:52 +0800

In memory_model.h, if CONFIG_SPARSEMEM_VMEMMAP is configed, kernel will
use vmemmap to do the __pfn_to_page/page_to_pfn, and kernel will not use
the "classic sparse" to do the __pfn_to_page/page_to_pfn.

So export the vmemmap when CONFIG_SPARSEMEM_VMEMMAP is configed.  This
makes the user applications (crash, etc) get faster
pfn_to_page/page_to_pfn operations too.

Link: https://lkml.kernel.org/r/20240227014952.3184-1-shijie@os.amperecomputing.com
Signed-off-by: Huang Shijie <shijie@os.amperecomputing.com>
Acked-by: Baoquan He <bhe@redhat.com>
Cc: Dave Young <dyoung@redhat.com>
Cc: Kazuhito Hagio <k-hagio-ab@nec.com>
Cc: Lianbo Jiang <lijiang@redhat.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 kernel/vmcore_info.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/kernel/vmcore_info.c~crash_core-export-vmemmap-when-config_sparsemem_vmemmap-is-enabled
+++ a/kernel/vmcore_info.c
@@ -152,6 +152,9 @@ static int __init crash_save_vmcoreinfo_
 	VMCOREINFO_SYMBOL(mem_map);
 	VMCOREINFO_SYMBOL(contig_page_data);
 #endif
+#ifdef CONFIG_SPARSEMEM_VMEMMAP
+	VMCOREINFO_SYMBOL_ARRAY(vmemmap);
+#endif
 #ifdef CONFIG_SPARSEMEM
 	VMCOREINFO_SYMBOL_ARRAY(mem_section);
 	VMCOREINFO_LENGTH(mem_section, NR_SECTION_ROOTS);
_

Patches currently in -mm which might be from shijie@os.amperecomputing.com are