Merge tag 'mm-hotfixes-stable-2026-05-18-21-07' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull misc fixes from Andrew Morton:
 "14 hotfixes. 9 are for MM. 10 are cc:stable and the remainder are for
  post-7.1 issues or aren't deemed suitable for backporting.

  There's a two-patch MAINTAINERS series from Mike Rapoport which
  updates us for the new KEXEC/KDUMP/crash/LUO/etc arrangements. And
  another two-patch series from Muchun Song to fix a couple of
  memory-hotplug issues. Otherwise singletons, please see the changelogs
  for details"

* tag 'mm-hotfixes-stable-2026-05-18-21-07' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm:
  mm/memory: fix spurious warning when unmapping device-private/exclusive pages
  mm: fix __vm_normal_page() to handle missing support for pmd_special()/pud_special()
  drivers/base/memory: fix memory block reference leak in poison accounting
  mm/memory_hotplug: fix memory block reference leak on remove
  lib: kunit_iov_iter: fix test fail on powerpc
  mm/page_alloc: fix initialization of tags of the huge zero folio with init_on_free
  MAINTAINERS: add kexec@ list to LIVE UPDATE ENTRY
  MAINTAINERS: add tree for KDUMP and KEXEC
  selftests/mm: run_vmtests.sh: fix destructive tests invocation
  scripts/gdb: slab: update field names of struct kmem_cache
  scripts/gdb: mm: cast untyped symbols in x86_page_ops
  mm/damon: fix damos_stat tracepoint format for sz_applied
  mm/damon/sysfs-schemes: call missing mem_cgroup_iter_break()
  mm/migrate_device: fix spinlock leak in migrate_vma_insert_huge_pmd_page

2 files changed, 51 insertions, 1 deletions

diff --git a/tools/testing/selftests/mm/hmm-tests.c b/tools/testing/selftests/mm/hmm-tests.c
index 788689497e92..77fb4c5d871b 100644
--- a/tools/testing/selftests/mm/hmm-tests.c
+++ b/tools/testing/selftests/mm/hmm-tests.c
@@ -986,6 +986,56 @@ TEST_F(hmm, migrate)
 }
 
 /*
+ * Migrate private file memory to device private memory.
+ */
+TEST_F(hmm, migrate_file_private)
+{
+	struct hmm_buffer *buffer;
+	unsigned long npages;
+	unsigned long size;
+	unsigned long i;
+	int *ptr;
+	int ret;
+	int fd;
+
+	npages = ALIGN(HMM_BUFFER_SIZE, self->page_size) >> self->page_shift;
+	ASSERT_NE(npages, 0);
+	size = npages << self->page_shift;
+
+	fd = hmm_create_file(size);
+	ASSERT_GE(fd, 0);
+
+	buffer = malloc(sizeof(*buffer));
+	ASSERT_NE(buffer, NULL);
+
+	buffer->fd = fd;
+	buffer->size = size;
+	buffer->mirror = malloc(size);
+	ASSERT_NE(buffer->mirror, NULL);
+
+	buffer->ptr = mmap(NULL, size,
+			   PROT_READ | PROT_WRITE,
+			   MAP_PRIVATE,
+			   buffer->fd, 0);
+	ASSERT_NE(buffer->ptr, MAP_FAILED);
+
+	/* Initialize buffer in system memory. */
+	for (i = 0, ptr = buffer->ptr; i < size / sizeof(*ptr); ++i)
+		ptr[i] = i;
+
+	/* Migrate memory to device. */
+	ret = hmm_migrate_sys_to_dev(self->fd, buffer, npages);
+	ASSERT_EQ(ret, 0);
+	ASSERT_EQ(buffer->cpages, npages);
+
+	/* Check what the device read. */
+	for (i = 0, ptr = buffer->mirror; i < size / sizeof(*ptr); ++i)
+		ASSERT_EQ(ptr[i], i);
+
+	hmm_buffer_free(buffer);
+}
+
+/*
  * Migrate anonymous memory to device private memory and fault some of it back
  * to system memory, then try migrating the resulting mix of system and device
  * private memory to the device.
diff --git a/tools/testing/selftests/mm/run_vmtests.sh b/tools/testing/selftests/mm/run_vmtests.sh
index d8468451b3a3..c17b133a81d2 100755
--- a/tools/testing/selftests/mm/run_vmtests.sh
+++ b/tools/testing/selftests/mm/run_vmtests.sh
@@ -103,7 +103,7 @@ RUN_ALL=false
 RUN_DESTRUCTIVE=false
 TAP_PREFIX="# "
 
-while getopts "aht:n" OPT; do
+while getopts "aht:nd" OPT; do
 	case ${OPT} in
 		"a") RUN_ALL=true ;;
 		"h") usage ;;