+ lib-test_kho-check-if-kho-is-enabled.patch added to mm-hotfixes-unstable branch

+ lib-test_kho-check-if-kho-is-enabled.patch added to mm-hotfixes-unstable branch

[Andrew Morton]

The patch titled
     Subject: lib/test_kho: check if KHO is enabled
has been added to the -mm mm-hotfixes-unstable branch.  Its filename is
     lib-test_kho-check-if-kho-is-enabled.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/lib-test_kho-check-if-kho-is-enabled.patch

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

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------------------------------------------------------
From: Pasha Tatashin <pasha.tatashin@soleen.com>
Subject: lib/test_kho: check if KHO is enabled
Date: Thu, 6 Nov 2025 17:06:35 -0500

We must check whether KHO is enabled prior to issuing KHO commands,
otherwise KHO internal data structures are not initialized.

Link: https://lkml.kernel.org/r/20251106220635.2608494-1-pasha.tatashin@soleen.com
Fixes: b753522bed0b ("kho: add test for kexec handover")
Signed-off-by: Pasha Tatashin <pasha.tatashin@soleen.com>
Reported-by: kernel test robot <oliver.sang@intel.com>
Closes: https://lore.kernel.org/oe-lkp/202511061629.e242724-lkp@intel.com
Cc: Alexander Graf <graf@amazon.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Pratyush Yadav <pratyush@kernel.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 lib/test_kho.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/lib/test_kho.c~lib-test_kho-check-if-kho-is-enabled
+++ a/lib/test_kho.c
@@ -301,6 +301,9 @@ static int __init kho_test_init(void)
 	phys_addr_t fdt_phys;
 	int err;
 
+	if (!kho_is_enabled())
+		return 0;
+
 	err = kho_retrieve_subtree(KHO_TEST_FDT, &fdt_phys);
 	if (!err)
 		return kho_test_restore(fdt_phys);
_

Patches currently in -mm which might be from pasha.tatashin@soleen.com are

liveupdate-kho-warn-and-fail-on-metadata-or-preserved-memory-in-scratch-area.patch
liveupdate-kho-warn-and-fail-on-metadata-or-preserved-memory-in-scratch-area-fix-2.patch
liveupdate-kho-increase-metadata-bitmap-size-to-page_size.patch
liveupdate-kho-allocate-metadata-directly-from-the-buddy-allocator.patch
lib-test_kho-check-if-kho-is-enabled.patch
kho-make-debugfs-interface-optional.patch
kho-add-interfaces-to-unpreserve-folios-page-ranges-and-vmalloc.patch
memblock-unpreserve-memory-in-case-of-error.patch
test_kho-unpreserve-memory-in-case-of-error.patch
kho-dont-unpreserve-memory-during-abort.patch
liveupdate-kho-move-to-kernel-liveupdate.patch
maintainers-update-kho-maintainers.patch