Merge tag 'mm-nonmm-stable-2025-08-03-12-47' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull non-MM updates from Andrew Morton:
 "Significant patch series in this pull request:

   - "squashfs: Remove page->mapping references" (Matthew Wilcox) gets
     us closer to being able to remove page->mapping

   - "relayfs: misc changes" (Jason Xing) does some maintenance and
     minor feature addition work in relayfs

   - "kdump: crashkernel reservation from CMA" (Jiri Bohac) switches
     us from static preallocation of the kdump crashkernel's working
     memory over to dynamic allocation. So the difficulty of a-priori
     estimation of the second kernel's needs is removed and the first
     kernel obtains extra memory

   - "generalize panic_print's dump function to be used by other
     kernel parts" (Feng Tang) implements some consolidation and
     rationalization of the various ways in which a failing kernel
     splats information at the operator

* tag 'mm-nonmm-stable-2025-08-03-12-47' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (80 commits)
  tools/getdelays: add backward compatibility for taskstats version
  kho: add test for kexec handover
  delaytop: enhance error logging and add PSI feature description
  samples: Kconfig: fix spelling mistake "instancess" -> "instances"
  fat: fix too many log in fat_chain_add()
  scripts/spelling.txt: add notifer||notifier to spelling.txt
  xen/xenbus: fix typo "notifer"
  net: mvneta: fix typo "notifer"
  drm/xe: fix typo "notifer"
  cxl: mce: fix typo "notifer"
  KVM: x86: fix typo "notifer"
  MAINTAINERS: add maintainers for delaytop
  ucount: use atomic_long_try_cmpxchg() in atomic_long_inc_below()
  ucount: fix atomic_long_inc_below() argument type
  kexec: enable CMA based contiguous allocation
  stackdepot: make max number of pools boot-time configurable
  lib/xxhash: remove unused functions
  init/Kconfig: restore CONFIG_BROKEN help text
  lib/raid6: update recov_rvv.c zero page usage
  docs: update docs after introducing delaytop
  ...

1 files changed, 20 insertions, 0 deletions

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 53332a1d8af4..dc0e0c6ed075 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -3214,6 +3214,26 @@ config TEST_OBJPOOL
 
 	  If unsure, say N.
 
+config TEST_KEXEC_HANDOVER
+	bool "Test for Kexec HandOver"
+	default n
+	depends on KEXEC_HANDOVER
+	help
+	  This option enables test for Kexec HandOver (KHO).
+	  The test consists of two parts: saving kernel data before kexec and
+	  restoring the data after kexec and verifying that it was properly
+	  handed over. This test module creates and saves data on the boot of
+	  the first kernel and restores and verifies the data on the boot of
+	  kexec'ed kernel.
+
+	  For detailed documentation about KHO, see Documentation/core-api/kho.
+
+	  To run the test run:
+
+	  tools/testing/selftests/kho/vmtest.sh -h
+
+	  If unsure, say N.
+
 config RATELIMIT_KUNIT_TEST
 	tristate "KUnit Test for correctness and stress of ratelimit" if !KUNIT_ALL_TESTS
 	depends on KUNIT