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Merge tag 'mm-hotfixes-stable-2025-05-25-00-58' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull hotfixes from Andrew Morton: "22 hotfixes. 13 are cc:stable and the remainder address post-6.14 issues or aren't considered necessary for -stable kernels. 19 are for MM" * tag 'mm-hotfixes-stable-2025-05-25-00-58' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (22 commits) mailmap: add Jarkko's employer email address mm: fix copy_vma() error handling for hugetlb mappings memcg: always call cond_resched() after fn() mm/hugetlb: fix kernel NULL pointer dereference when replacing free hugetlb folios mm: vmalloc: only zero-init on vrealloc shrink mm: vmalloc: actually use the in-place vrealloc region alloc_tag: allocate percpu counters for module tags dynamically module: release codetag section when module load fails mm/cma: make detection of highmem_start more robust MAINTAINERS: add mm memory policy section MAINTAINERS: add mm ksm section kasan: avoid sleepable page allocation from atomic context highmem: add folio_test_partial_kmap() MAINTAINERS: add hung-task detector section taskstats: fix struct taskstats breaks backward compatibility since version 15 mm/truncate: fix out-of-bounds when doing a right-aligned split MAINTAINERS: add mm reclaim section MAINTAINERS: update page allocator section mm: fix VM_UFFD_MINOR == VM_SHADOW_STACK on USERFAULTFD=y && ARM64_GCS=y mm: mmap: map MAP_STACK to VM_NOHUGEPAGE only if THP is enabled ...
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‎.mailmap‎

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@@ -313,6 +313,7 @@ Jan Glauber <[email protected]> <[email protected]>
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Jan Kuliga <[email protected]> <[email protected]>
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Jarkko Sakkinen <[email protected]> <[email protected]>
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Jarkko Sakkinen <[email protected]> <[email protected]>
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Jarkko Sakkinen <[email protected]> <[email protected]>
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Jason Gunthorpe <[email protected]> <[email protected]>
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Jason Gunthorpe <[email protected]> <[email protected]>
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Jason Gunthorpe <[email protected]> <[email protected]>

‎MAINTAINERS‎

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Original file line numberDiff line numberDiff line change
@@ -11106,6 +11106,14 @@ L: [email protected]
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S: Odd Fixes
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F: drivers/tty/hvc/
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HUNG TASK DETECTOR
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M: Andrew Morton <[email protected]>
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R: Lance Yang <[email protected]>
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L: [email protected]
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S: Maintained
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F: include/linux/hung_task.h
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F: kernel/hung_task.c
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I2C ACPI SUPPORT
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M: Mika Westerberg <[email protected]>
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L: [email protected]
@@ -15561,6 +15569,41 @@ W: http://www.linux-mm.org
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T: git git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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F: mm/gup.c
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MEMORY MANAGEMENT - KSM (Kernel Samepage Merging)
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M: Andrew Morton <[email protected]>
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M: David Hildenbrand <[email protected]>
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R: Xu Xin <[email protected]>
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R: Chengming Zhou <[email protected]>
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L: [email protected]
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S: Maintained
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W: http://www.linux-mm.org
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T: git git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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F: Documentation/admin-guide/mm/ksm.rst
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F: Documentation/mm/ksm.rst
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F: include/linux/ksm.h
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F: include/trace/events/ksm.h
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F: mm/ksm.c
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MEMORY MANAGEMENT - MEMORY POLICY AND MIGRATION
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M: Andrew Morton <[email protected]>
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M: David Hildenbrand <[email protected]>
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R: Zi Yan <[email protected]>
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R: Matthew Brost <[email protected]>
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R: Joshua Hahn <[email protected]>
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R: Rakie Kim <[email protected]>
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R: Byungchul Park <[email protected]>
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R: Gregory Price <[email protected]>
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R: Ying Huang <[email protected]>
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L: [email protected]
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S: Maintained
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W: http://www.linux-mm.org
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T: git git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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F: include/linux/mempolicy.h
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F: include/linux/migrate.h
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F: mm/mempolicy.c
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F: mm/migrate.c
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F: mm/migrate_device.c
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MEMORY MANAGEMENT - NUMA MEMBLOCKS AND NUMA EMULATION
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M: Andrew Morton <[email protected]>
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M: Mike Rapoport <[email protected]>
@@ -15573,18 +15616,33 @@ F: mm/numa_memblks.c
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MEMORY MANAGEMENT - PAGE ALLOCATOR
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M: Andrew Morton <[email protected]>
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R: Vlastimil Babka <[email protected]>
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M: Vlastimil Babka <[email protected]>
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R: Suren Baghdasaryan <[email protected]>
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R: Michal Hocko <[email protected]>
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R: Brendan Jackman <[email protected]>
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R: Johannes Weiner <[email protected]>
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R: Zi Yan <[email protected]>
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L: [email protected]
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S: Maintained
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F: include/linux/compaction.h
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F: include/linux/gfp.h
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F: include/linux/page-isolation.h
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F: mm/compaction.c
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F: mm/page_alloc.c
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F: include/linux/gfp.h
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F: include/linux/compaction.h
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F: mm/page_isolation.c
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MEMORY MANAGEMENT - RECLAIM
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M: Andrew Morton <[email protected]>
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M: Johannes Weiner <[email protected]>
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R: David Hildenbrand <[email protected]>
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R: Michal Hocko <[email protected]>
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R: Qi Zheng <[email protected]>
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R: Shakeel Butt <[email protected]>
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R: Lorenzo Stoakes <[email protected]>
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L: [email protected]
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S: Maintained
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F: mm/pt_reclaim.c
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F: mm/vmscan.c
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MEMORY MANAGEMENT - RMAP (REVERSE MAPPING)
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M: Andrew Morton <[email protected]>
@@ -25912,7 +25970,7 @@ F: tools/testing/vsock/
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VMALLOC
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M: Andrew Morton <[email protected]>
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R: Uladzislau Rezki <[email protected]>
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M: Uladzislau Rezki <[email protected]>
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L: [email protected]
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S: Maintained
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W: http://www.linux-mm.org

‎include/linux/alloc_tag.h‎

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@@ -104,13 +104,25 @@ DECLARE_PER_CPU(struct alloc_tag_counters, _shared_alloc_tag);
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#else /* ARCH_NEEDS_WEAK_PER_CPU */
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#ifdef MODULE
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#define DEFINE_ALLOC_TAG(_alloc_tag) \
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static struct alloc_tag _alloc_tag __used __aligned(8) \
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__section(ALLOC_TAG_SECTION_NAME) = { \
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.ct = CODE_TAG_INIT, \
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.counters = NULL };
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#else /* MODULE */
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#define DEFINE_ALLOC_TAG(_alloc_tag) \
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static DEFINE_PER_CPU(struct alloc_tag_counters, _alloc_tag_cntr); \
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static struct alloc_tag _alloc_tag __used __aligned(8) \
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__section(ALLOC_TAG_SECTION_NAME) = { \
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.ct = CODE_TAG_INIT, \
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.counters = &_alloc_tag_cntr };
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#endif /* MODULE */
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#endif /* ARCH_NEEDS_WEAK_PER_CPU */
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DECLARE_STATIC_KEY_MAYBE(CONFIG_MEM_ALLOC_PROFILING_ENABLED_BY_DEFAULT,

‎include/linux/codetag.h‎

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@@ -36,10 +36,10 @@ union codetag_ref {
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struct codetag_type_desc {
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const char *section;
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size_t tag_size;
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void (*module_load)(struct codetag_type *cttype,
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struct codetag_module *cmod);
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void (*module_unload)(struct codetag_type *cttype,
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struct codetag_module *cmod);
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void (*module_load)(struct module *mod,
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struct codetag *start, struct codetag *end);
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void (*module_unload)(struct module *mod,
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struct codetag *start, struct codetag *end);
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#ifdef CONFIG_MODULES
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void (*module_replaced)(struct module *mod, struct module *new_mod);
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bool (*needs_section_mem)(struct module *mod, unsigned long size);

‎include/linux/highmem.h‎

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@@ -461,7 +461,7 @@ static inline void memcpy_from_folio(char *to, struct folio *folio,
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const char *from = kmap_local_folio(folio, offset);
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size_t chunk = len;
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if (folio_test_highmem(folio) &&
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if (folio_test_partial_kmap(folio) &&
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chunk > PAGE_SIZE - offset_in_page(offset))
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chunk = PAGE_SIZE - offset_in_page(offset);
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memcpy(to, from, chunk);
@@ -489,7 +489,7 @@ static inline void memcpy_to_folio(struct folio *folio, size_t offset,
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char *to = kmap_local_folio(folio, offset);
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size_t chunk = len;
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if (folio_test_highmem(folio) &&
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if (folio_test_partial_kmap(folio) &&
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chunk > PAGE_SIZE - offset_in_page(offset))
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chunk = PAGE_SIZE - offset_in_page(offset);
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memcpy(to, from, chunk);
@@ -522,7 +522,7 @@ static inline __must_check void *folio_zero_tail(struct folio *folio,
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{
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size_t len = folio_size(folio) - offset;
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if (folio_test_highmem(folio)) {
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if (folio_test_partial_kmap(folio)) {
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size_t max = PAGE_SIZE - offset_in_page(offset);
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while (len > max) {
@@ -560,7 +560,7 @@ static inline void folio_fill_tail(struct folio *folio, size_t offset,
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VM_BUG_ON(offset + len > folio_size(folio));
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if (folio_test_highmem(folio)) {
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if (folio_test_partial_kmap(folio)) {
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size_t max = PAGE_SIZE - offset_in_page(offset);
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while (len > max) {
@@ -597,7 +597,7 @@ static inline size_t memcpy_from_file_folio(char *to, struct folio *folio,
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size_t offset = offset_in_folio(folio, pos);
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char *from = kmap_local_folio(folio, offset);
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600-
if (folio_test_highmem(folio)) {
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if (folio_test_partial_kmap(folio)) {
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offset = offset_in_page(offset);
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len = min_t(size_t, len, PAGE_SIZE - offset);
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} else

‎include/linux/hugetlb.h‎

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@@ -275,6 +275,7 @@ long hugetlb_change_protection(struct vm_area_struct *vma,
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bool is_hugetlb_entry_migration(pte_t pte);
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bool is_hugetlb_entry_hwpoisoned(pte_t pte);
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void hugetlb_unshare_all_pmds(struct vm_area_struct *vma);
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void fixup_hugetlb_reservations(struct vm_area_struct *vma);
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#else /* !CONFIG_HUGETLB_PAGE */
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@@ -468,6 +469,10 @@ static inline vm_fault_t hugetlb_fault(struct mm_struct *mm,
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static inline void hugetlb_unshare_all_pmds(struct vm_area_struct *vma) { }
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static inline void fixup_hugetlb_reservations(struct vm_area_struct *vma)
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{
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}
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#endif /* !CONFIG_HUGETLB_PAGE */
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#ifndef pgd_write

‎include/linux/mm.h‎

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@@ -385,7 +385,7 @@ extern unsigned int kobjsize(const void *objp);
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#endif
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#ifdef CONFIG_HAVE_ARCH_USERFAULTFD_MINOR
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# define VM_UFFD_MINOR_BIT 38
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# define VM_UFFD_MINOR_BIT 41
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# define VM_UFFD_MINOR BIT(VM_UFFD_MINOR_BIT) /* UFFD minor faults */
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#else /* !CONFIG_HAVE_ARCH_USERFAULTFD_MINOR */
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# define VM_UFFD_MINOR VM_NONE

‎include/linux/mman.h‎

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@@ -155,7 +155,9 @@ calc_vm_flag_bits(struct file *file, unsigned long flags)
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return _calc_vm_trans(flags, MAP_GROWSDOWN, VM_GROWSDOWN ) |
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_calc_vm_trans(flags, MAP_LOCKED, VM_LOCKED ) |
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_calc_vm_trans(flags, MAP_SYNC, VM_SYNC ) |
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#ifdef CONFIG_TRANSPARENT_HUGEPAGE
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_calc_vm_trans(flags, MAP_STACK, VM_NOHUGEPAGE) |
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#endif
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arch_calc_vm_flag_bits(file, flags);
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}
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‎include/linux/page-flags.h‎

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@@ -615,6 +615,13 @@ FOLIO_FLAG(dropbehind, FOLIO_HEAD_PAGE)
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PAGEFLAG_FALSE(HighMem, highmem)
616616
#endif
617617

618+
/* Does kmap_local_folio() only allow access to one page of the folio? */
619+
#ifdef CONFIG_DEBUG_KMAP_LOCAL_FORCE_MAP
620+
#define folio_test_partial_kmap(f) true
621+
#else
622+
#define folio_test_partial_kmap(f) folio_test_highmem(f)
623+
#endif
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#ifdef CONFIG_SWAP
619626
static __always_inline bool folio_test_swapcache(const struct folio *folio)
620627
{

‎include/linux/percpu.h‎

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@@ -15,11 +15,7 @@
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/* enough to cover all DEFINE_PER_CPUs in modules */
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#ifdef CONFIG_MODULES
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#ifdef CONFIG_MEM_ALLOC_PROFILING
19-
#define PERCPU_MODULE_RESERVE (8 << 13)
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#else
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#define PERCPU_MODULE_RESERVE (8 << 10)
22-
#endif
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#else
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#define PERCPU_MODULE_RESERVE 0
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#endif

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