- The series "zram: optimal post-processing target selection" from

Sergey Senozhatsky improves zram's post-processing selection algorithm.
   This leads to improved memory savings.
 
 - Wei Yang has gone to town on the mapletree code, contributing several
   series which clean up the implementation:
 
 	- "refine mas_mab_cp()"
 	- "Reduce the space to be cleared for maple_big_node"
 	- "maple_tree: simplify mas_push_node()"
 	- "Following cleanup after introduce mas_wr_store_type()"
 	- "refine storing null"
 
 - The series "selftests/mm: hugetlb_fault_after_madv improvements" from
   David Hildenbrand fixes this selftest for s390.
 
 - The series "introduce pte_offset_map_{ro|rw}_nolock()" from Qi Zheng
   implements some rationaizations and cleanups in the page mapping code.
 
 - The series "mm: optimize shadow entries removal" from Shakeel Butt
   optimizes the file truncation code by speeding up the handling of shadow
   entries.
 
 - The series "Remove PageKsm()" from Matthew Wilcox completes the
   migration of this flag over to being a folio-based flag.
 
 - The series "Unify hugetlb into arch_get_unmapped_area functions" from
   Oscar Salvador implements a bunch of consolidations and cleanups in the
   hugetlb code.
 
 - The series "Do not shatter hugezeropage on wp-fault" from Dev Jain
   takes away the wp-fault time practice of turning a huge zero page into
   small pages.  Instead we replace the whole thing with a THP.  More
   consistent cleaner and potentiall saves a large number of pagefaults.
 
 - The series "percpu: Add a test case and fix for clang" from Andy
   Shevchenko enhances and fixes the kernel's built in percpu test code.
 
 - The series "mm/mremap: Remove extra vma tree walk" from Liam Howlett
   optimizes mremap() by avoiding doing things which we didn't need to do.
 
 - The series "Improve the tmpfs large folio read performance" from
   Baolin Wang teaches tmpfs to copy data into userspace at the folio size
   rather than as individual pages.  A 20% speedup was observed.
 
 - The series "mm/damon/vaddr: Fix issue in
   damon_va_evenly_split_region()" fro Zheng Yejian fixes DAMON splitting.
 
 - The series "memcg-v1: fully deprecate charge moving" from Shakeel Butt
   removes the long-deprecated memcgv2 charge moving feature.
 
 - The series "fix error handling in mmap_region() and refactor" from
   Lorenzo Stoakes cleanup up some of the mmap() error handling and
   addresses some potential performance issues.
 
 - The series "x86/module: use large ROX pages for text allocations" from
   Mike Rapoport teaches x86 to use large pages for read-only-execute
   module text.
 
 - The series "page allocation tag compression" from Suren Baghdasaryan
   is followon maintenance work for the new page allocation profiling
   feature.
 
 - The series "page->index removals in mm" from Matthew Wilcox remove
   most references to page->index in mm/.  A slow march towards shrinking
   struct page.
 
 - The series "damon/{self,kunit}tests: minor fixups for DAMON debugfs
   interface tests" from Andrew Paniakin performs maintenance work for
   DAMON's self testing code.
 
 - The series "mm: zswap swap-out of large folios" from Kanchana Sridhar
   improves zswap's batching of compression and decompression.  It is a
   step along the way towards using Intel IAA hardware acceleration for
   this zswap operation.
 
 - The series "kasan: migrate the last module test to kunit" from
   Sabyrzhan Tasbolatov completes the migration of the KASAN built-in tests
   over to the KUnit framework.
 
 - The series "implement lightweight guard pages" from Lorenzo Stoakes
   permits userapace to place fault-generating guard pages within a single
   VMA, rather than requiring that multiple VMAs be created for this.
   Improved efficiencies for userspace memory allocators are expected.
 
 - The series "memcg: tracepoint for flushing stats" from JP Kobryn uses
   tracepoints to provide increased visibility into memcg stats flushing
   activity.
 
 - The series "zram: IDLE flag handling fixes" from Sergey Senozhatsky
   fixes a zram buglet which potentially affected performance.
 
 - The series "mm: add more kernel parameters to control mTHP" from
   Maíra Canal enhances our ability to control/configuremultisize THP from
   the kernel boot command line.
 
 - The series "kasan: few improvements on kunit tests" from Sabyrzhan
   Tasbolatov has a couple of fixups for the KASAN KUnit tests.
 
 - The series "mm/list_lru: Split list_lru lock into per-cgroup scope"
   from Kairui Song optimizes list_lru memory utilization when lockdep is
   enabled.
 -----BEGIN PGP SIGNATURE-----
 
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 jkeuAQCkl+BmeYHE6uG0hi3pRxkupseR6DEOAYIiTv0/l8/GggD/Z3jmEeqnZaNq
 xyyenpibWgUoShU2wZ/Ha8FE5WDINwg=
 =JfWR
 -----END PGP SIGNATURE-----

Merge tag 'mm-stable-2024-11-18-19-27' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull MM updates from Andrew Morton:

 - The series "zram: optimal post-processing target selection" from
   Sergey Senozhatsky improves zram's post-processing selection
   algorithm. This leads to improved memory savings.

 - Wei Yang has gone to town on the mapletree code, contributing several
   series which clean up the implementation:
	- "refine mas_mab_cp()"
	- "Reduce the space to be cleared for maple_big_node"
	- "maple_tree: simplify mas_push_node()"
	- "Following cleanup after introduce mas_wr_store_type()"
	- "refine storing null"

 - The series "selftests/mm: hugetlb_fault_after_madv improvements" from
   David Hildenbrand fixes this selftest for s390.

 - The series "introduce pte_offset_map_{ro|rw}_nolock()" from Qi Zheng
   implements some rationaizations and cleanups in the page mapping
   code.

 - The series "mm: optimize shadow entries removal" from Shakeel Butt
   optimizes the file truncation code by speeding up the handling of
   shadow entries.

 - The series "Remove PageKsm()" from Matthew Wilcox completes the
   migration of this flag over to being a folio-based flag.

 - The series "Unify hugetlb into arch_get_unmapped_area functions" from
   Oscar Salvador implements a bunch of consolidations and cleanups in
   the hugetlb code.

 - The series "Do not shatter hugezeropage on wp-fault" from Dev Jain
   takes away the wp-fault time practice of turning a huge zero page
   into small pages. Instead we replace the whole thing with a THP. More
   consistent cleaner and potentiall saves a large number of pagefaults.

 - The series "percpu: Add a test case and fix for clang" from Andy
   Shevchenko enhances and fixes the kernel's built in percpu test code.

 - The series "mm/mremap: Remove extra vma tree walk" from Liam Howlett
   optimizes mremap() by avoiding doing things which we didn't need to
   do.

 - The series "Improve the tmpfs large folio read performance" from
   Baolin Wang teaches tmpfs to copy data into userspace at the folio
   size rather than as individual pages. A 20% speedup was observed.

 - The series "mm/damon/vaddr: Fix issue in
   damon_va_evenly_split_region()" fro Zheng Yejian fixes DAMON
   splitting.

 - The series "memcg-v1: fully deprecate charge moving" from Shakeel
   Butt removes the long-deprecated memcgv2 charge moving feature.

 - The series "fix error handling in mmap_region() and refactor" from
   Lorenzo Stoakes cleanup up some of the mmap() error handling and
   addresses some potential performance issues.

 - The series "x86/module: use large ROX pages for text allocations"
   from Mike Rapoport teaches x86 to use large pages for
   read-only-execute module text.

 - The series "page allocation tag compression" from Suren Baghdasaryan
   is followon maintenance work for the new page allocation profiling
   feature.

 - The series "page->index removals in mm" from Matthew Wilcox remove
   most references to page->index in mm/. A slow march towards shrinking
   struct page.

 - The series "damon/{self,kunit}tests: minor fixups for DAMON debugfs
   interface tests" from Andrew Paniakin performs maintenance work for
   DAMON's self testing code.

 - The series "mm: zswap swap-out of large folios" from Kanchana Sridhar
   improves zswap's batching of compression and decompression. It is a
   step along the way towards using Intel IAA hardware acceleration for
   this zswap operation.

 - The series "kasan: migrate the last module test to kunit" from
   Sabyrzhan Tasbolatov completes the migration of the KASAN built-in
   tests over to the KUnit framework.

 - The series "implement lightweight guard pages" from Lorenzo Stoakes
   permits userapace to place fault-generating guard pages within a
   single VMA, rather than requiring that multiple VMAs be created for
   this. Improved efficiencies for userspace memory allocators are
   expected.

 - The series "memcg: tracepoint for flushing stats" from JP Kobryn uses
   tracepoints to provide increased visibility into memcg stats flushing
   activity.

 - The series "zram: IDLE flag handling fixes" from Sergey Senozhatsky
   fixes a zram buglet which potentially affected performance.

 - The series "mm: add more kernel parameters to control mTHP" from
   Maíra Canal enhances our ability to control/configuremultisize THP
   from the kernel boot command line.

 - The series "kasan: few improvements on kunit tests" from Sabyrzhan
   Tasbolatov has a couple of fixups for the KASAN KUnit tests.

 - The series "mm/list_lru: Split list_lru lock into per-cgroup scope"
   from Kairui Song optimizes list_lru memory utilization when lockdep
   is enabled.

* tag 'mm-stable-2024-11-18-19-27' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (215 commits)
  cma: enforce non-zero pageblock_order during cma_init_reserved_mem()
  mm/kfence: add a new kunit test test_use_after_free_read_nofault()
  zram: fix NULL pointer in comp_algorithm_show()
  memcg/hugetlb: add hugeTLB counters to memcg
  vmstat: call fold_vm_zone_numa_events() before show per zone NUMA event
  mm: mmap_lock: check trace_mmap_lock_$type_enabled() instead of regcount
  zram: ZRAM_DEF_COMP should depend on ZRAM
  MAINTAINERS/MEMORY MANAGEMENT: add document files for mm
  Docs/mm/damon: recommend academic papers to read and/or cite
  mm: define general function pXd_init()
  kmemleak: iommu/iova: fix transient kmemleak false positive
  mm/list_lru: simplify the list_lru walk callback function
  mm/list_lru: split the lock to per-cgroup scope
  mm/list_lru: simplify reparenting and initial allocation
  mm/list_lru: code clean up for reparenting
  mm/list_lru: don't export list_lru_add
  mm/list_lru: don't pass unnecessary key parameters
  kasan: add kunit tests for kmalloc_track_caller, kmalloc_node_track_caller
  kasan: change kasan_atomics kunit test as KUNIT_CASE_SLOW
  kasan: use EXPORT_SYMBOL_IF_KUNIT to export symbols
  ...

Documentation/admin-guide/blockdev/zram.rst

@@ -47,6 +47,8 @@ The list of possible return codes:
 -ENOMEM	  zram was not able to allocate enough memory to fulfil your
 	  needs.
 -EINVAL	  invalid input has been provided.
+-EAGAIN	  re-try operation later (e.g. when attempting to run recompress
+	  and writeback simultaneously).
 ========  =============================================================
 
 If you use 'echo', the returned value is set by the 'echo' utility,

Documentation/admin-guide/cgroup-v1/memory.rst

@@ -90,9 +90,7 @@ Brief summary of control files.
                                      used.
  memory.swappiness		     set/show swappiness parameter of vmscan
 				     (See sysctl's vm.swappiness)
- memory.move_charge_at_immigrate     set/show controls of moving charges
-                                     This knob is deprecated and shouldn't be
-                                     used.
+ memory.move_charge_at_immigrate     This knob is deprecated.
  memory.oom_control		     set/show oom controls.
                                      This knob is deprecated and shouldn't be
                                      used.
@@ -243,10 +241,6 @@ behind this approach is that a cgroup that aggressively uses a shared
 page will eventually get charged for it (once it is uncharged from
 the cgroup that brought it in -- this will happen on memory pressure).
 
-But see :ref:`section 8.2 <cgroup-v1-memory-movable-charges>` when moving a
-task to another cgroup, its pages may be recharged to the new cgroup, if
-move_charge_at_immigrate has been chosen.
-
 2.4 Swap Extension
 --------------------------------------
 
@@ -756,78 +750,8 @@ If we want to change this to 1G, we can at any time use::
 
 THIS IS DEPRECATED!
 
-It's expensive and unreliable! It's better practice to launch workload
-tasks directly from inside their target cgroup. Use dedicated workload
-cgroups to allow fine-grained policy adjustments without having to
-move physical pages between control domains.
-
-Users can move charges associated with a task along with task migration, that
-is, uncharge task's pages from the old cgroup and charge them to the new cgroup.
-This feature is not supported in !CONFIG_MMU environments because of lack of
-page tables.
-
-8.1 Interface
--------------
-
-This feature is disabled by default. It can be enabled (and disabled again) by
-writing to memory.move_charge_at_immigrate of the destination cgroup.
-
-If you want to enable it::
-
-	# echo (some positive value) > memory.move_charge_at_immigrate
-
-.. note::
-      Each bits of move_charge_at_immigrate has its own meaning about what type
-      of charges should be moved. See :ref:`section 8.2
-      <cgroup-v1-memory-movable-charges>` for details.
-
-.. note::
-      Charges are moved only when you move mm->owner, in other words,
-      a leader of a thread group.
-
-.. note::
-      If we cannot find enough space for the task in the destination cgroup, we
-      try to make space by reclaiming memory. Task migration may fail if we
-      cannot make enough space.
-
-.. note::
-      It can take several seconds if you move charges much.
-
-And if you want disable it again::
-
-	# echo 0 > memory.move_charge_at_immigrate
-
-.. _cgroup-v1-memory-movable-charges:
-
-8.2 Type of charges which can be moved
---------------------------------------
-
-Each bit in move_charge_at_immigrate has its own meaning about what type of
-charges should be moved. But in any case, it must be noted that an account of
-a page or a swap can be moved only when it is charged to the task's current
-(old) memory cgroup.
-
-+---+--------------------------------------------------------------------------+
-|bit| what type of charges would be moved ?                                    |
-+===+==========================================================================+
-| 0 | A charge of an anonymous page (or swap of it) used by the target task.   |
-|   | You must enable Swap Extension (see 2.4) to enable move of swap charges. |
-+---+--------------------------------------------------------------------------+
-| 1 | A charge of file pages (normal file, tmpfs file (e.g. ipc shared memory) |
-|   | and swaps of tmpfs file) mmapped by the target task. Unlike the case of  |
-|   | anonymous pages, file pages (and swaps) in the range mmapped by the task |
-|   | will be moved even if the task hasn't done page fault, i.e. they might   |
-|   | not be the task's "RSS", but other task's "RSS" that maps the same file. |
-|   | The mapcount of the page is ignored (the page can be moved independent   |
-|   | of the mapcount). You must enable Swap Extension (see 2.4) to            |
-|   | enable move of swap charges.                                             |
-+---+--------------------------------------------------------------------------+
-
-8.3 TODO
---------
-
-- All of moving charge operations are done under cgroup_mutex. It's not good
-  behavior to hold the mutex too long, so we may need some trick.
+Reading memory.move_charge_at_immigrate will always return 0 and writing
+to it will always return -EINVAL.
 
 9. Memory thresholds
 ====================

Documentation/admin-guide/cgroup-v2.rst

@@ -1655,6 +1655,11 @@ The following nested keys are defined.
 	  pgdemote_khugepaged
 		Number of pages demoted by khugepaged.
 
+	  hugetlb
+		Amount of memory used by hugetlb pages. This metric only shows
+		up if hugetlb usage is accounted for in memory.current (i.e.
+		cgroup is mounted with the memory_hugetlb_accounting option).
+
   memory.numa_stat
 	A read-only nested-keyed file which exists on non-root cgroups.
 

Documentation/admin-guide/kernel-parameters.txt

@@ -6711,6 +6711,16 @@
 			Force threading of all interrupt handlers except those
 			marked explicitly IRQF_NO_THREAD.
 
+	thp_shmem=	[KNL]
+			Format: <size>[KMG],<size>[KMG]:<policy>;<size>[KMG]-<size>[KMG]:<policy>
+			Control the default policy of each hugepage size for the
+			internal shmem mount. <policy> is one of policies available
+			for the shmem mount ("always", "inherit", "never", "within_size",
+			and "advise").
+			It can be used multiple times for multiple shmem THP sizes.
+			See Documentation/admin-guide/mm/transhuge.rst for more
+			details.
+
 	topology=	[S390,EARLY]
 			Format: {off | on}
 			Specify if the kernel should make use of the cpu
@@ -6952,6 +6962,13 @@
 			See Documentation/admin-guide/mm/transhuge.rst
 			for more details.
 
+	transparent_hugepage_shmem= [KNL]
+			Format: [always|within_size|advise|never|deny|force]
+			Can be used to control the hugepage allocation policy for
+			the internal shmem mount.
+			See Documentation/admin-guide/mm/transhuge.rst
+			for more details.
+
 	trusted.source=	[KEYS]
 			Format: <string>
 			This parameter identifies the trust source as a backend

Documentation/admin-guide/mm/transhuge.rst

@@ -326,6 +326,29 @@ PMD_ORDER THP policy will be overridden. If the policy for PMD_ORDER
 is not defined within a valid ``thp_anon``, its policy will default to
 ``never``.
 
+Similarly to ``transparent_hugepage``, you can control the hugepage
+allocation policy for the internal shmem mount by using the kernel parameter
+``transparent_hugepage_shmem=<policy>``, where ``<policy>`` is one of the
+seven valid policies for shmem (``always``, ``within_size``, ``advise``,
+``never``, ``deny``, and ``force``).
+
+In the same manner as ``thp_anon`` controls each supported anonymous THP
+size, ``thp_shmem`` controls each supported shmem THP size. ``thp_shmem``
+has the same format as ``thp_anon``, but also supports the policy
+``within_size``.
+
+``thp_shmem=`` may be specified multiple times to configure all THP sizes
+as required. If ``thp_shmem=`` is specified at least once, any shmem THP
+sizes not explicitly configured on the command line are implicitly set to
+``never``.
+
+``transparent_hugepage_shmem`` setting only affects the global toggle. If
+``thp_shmem`` is not specified, PMD_ORDER hugepage will default to
+``inherit``. However, if a valid ``thp_shmem`` setting is provided by the
+user, the PMD_ORDER hugepage policy will be overridden. If the policy for
+PMD_ORDER is not defined within a valid ``thp_shmem``, its policy will
+default to ``never``.
+
 Hugepages in tmpfs/shmem
 ========================
 
@@ -530,10 +553,18 @@ anon_fault_fallback_charge
 	instead falls back to using huge pages with lower orders or
 	small pages even though the allocation was successful.
 
-swpout
-	is incremented every time a huge page is swapped out in one
+zswpout
+	is incremented every time a huge page is swapped out to zswap in one
 	piece without splitting.
 
+swpin
+	is incremented every time a huge page is swapped in from a non-zswap
+	swap device in one piece.
+
+swpout
+	is incremented every time a huge page is swapped out to a non-zswap
+	swap device in one piece without splitting.
+
 swpout_fallback
 	is incremented if a huge page has to be split before swapout.
 	Usually because failed to allocate some continuous swap space

Documentation/dev-tools/kasan.rst

@@ -511,19 +511,14 @@ Tests
 ~~~~~
 
 There are KASAN tests that allow verifying that KASAN works and can detect
-certain types of memory corruptions. The tests consist of two parts:
+certain types of memory corruptions.
 
-1. Tests that are integrated with the KUnit Test Framework. Enabled with
-``CONFIG_KASAN_KUNIT_TEST``. These tests can be run and partially verified
+All KASAN tests are integrated with the KUnit Test Framework and can be enabled
+via ``CONFIG_KASAN_KUNIT_TEST``. The tests can be run and partially verified
 automatically in a few different ways; see the instructions below.
 
-2. Tests that are currently incompatible with KUnit. Enabled with
-``CONFIG_KASAN_MODULE_TEST`` and can only be run as a module. These tests can
-only be verified manually by loading the kernel module and inspecting the
-kernel log for KASAN reports.
-
-Each KUnit-compatible KASAN test prints one of multiple KASAN reports if an
-error is detected. Then the test prints its number and status.
+Each KASAN test prints one of multiple KASAN reports if an error is detected.
+Then the test prints its number and status.
 
 When a test passes::
 
@@ -550,16 +545,16 @@ Or, if one of the tests failed::
 
         not ok 1 - kasan
 
-There are a few ways to run KUnit-compatible KASAN tests.
+There are a few ways to run the KASAN tests.
 
 1. Loadable module
 
-   With ``CONFIG_KUNIT`` enabled, KASAN-KUnit tests can be built as a loadable
-   module and run by loading ``kasan_test.ko`` with ``insmod`` or ``modprobe``.
+   With ``CONFIG_KUNIT`` enabled, the tests can be built as a loadable module
+   and run by loading ``kasan_test.ko`` with ``insmod`` or ``modprobe``.
 
 2. Built-In
 
-   With ``CONFIG_KUNIT`` built-in, KASAN-KUnit tests can be built-in as well.
+   With ``CONFIG_KUNIT`` built-in, the tests can be built-in as well.
    In this case, the tests will run at boot as a late-init call.
 
 3. Using kunit_tool

Documentation/dev-tools/kmemleak.rst

@@ -161,6 +161,7 @@ See the include/linux/kmemleak.h header for the functions prototype.
 - ``kmemleak_free_percpu``	 - notify of a percpu memory block freeing
 - ``kmemleak_update_trace``	 - update object allocation stack trace
 - ``kmemleak_not_leak``	 - mark an object as not a leak
+- ``kmemleak_transient_leak``	 - mark an object as a transient leak
 - ``kmemleak_ignore``		 - do not scan or report an object as leak
 - ``kmemleak_scan_area``	 - add scan areas inside a memory block
 - ``kmemleak_no_scan``	 - do not scan a memory block

Documentation/mm/allocation-profiling.rst

@@ -18,12 +18,17 @@ kconfig options:
   missing annotation
 
 Boot parameter:
-  sysctl.vm.mem_profiling=0|1|never
+  sysctl.vm.mem_profiling={0|1|never}[,compressed]
 
   When set to "never", memory allocation profiling overhead is minimized and it
   cannot be enabled at runtime (sysctl becomes read-only).
   When CONFIG_MEM_ALLOC_PROFILING_ENABLED_BY_DEFAULT=y, default value is "1".
   When CONFIG_MEM_ALLOC_PROFILING_ENABLED_BY_DEFAULT=n, default value is "never".
+  "compressed" optional parameter will try to store page tag references in a
+  compact format, avoiding page extensions. This results in improved performance
+  and memory consumption, however it might fail depending on system configuration.
+  If compression fails, a warning is issued and memory allocation profiling gets
+  disabled.
 
 sysctl:
   /proc/sys/vm/mem_profiling

Documentation/mm/damon/index.rst

@@ -37,3 +37,9 @@ with no code but simple configurations.
 
 To utilize and control DAMON from the user-space, please refer to the
 administration :doc:`guide </admin-guide/mm/damon/index>`.
+
+If you prefer academic papers for reading and citations, please use the papers
+from `HPDC'22 <https://dl.acm.org/doi/abs/10.1145/3502181.3531466>`_ and
+`Middleware19 Industry <https://dl.acm.org/doi/abs/10.1145/3366626.3368125>`_ .
+Note that those cover DAMON implementations in Linux v5.16 and v5.15,
+respectively.

Documentation/mm/split_page_table_lock.rst

@@ -16,9 +16,13 @@ There are helpers to lock/unlock a table and other accessor functions:
  - pte_offset_map_lock()
 	maps PTE and takes PTE table lock, returns pointer to PTE with
 	pointer to its PTE table lock, or returns NULL if no PTE table;
- - pte_offset_map_nolock()
+ - pte_offset_map_ro_nolock()
 	maps PTE, returns pointer to PTE with pointer to its PTE table
 	lock (not taken), or returns NULL if no PTE table;
+ - pte_offset_map_rw_nolock()
+	maps PTE, returns pointer to PTE with pointer to its PTE table
+	lock (not taken) and the value of its pmd entry, or returns NULL
+	if no PTE table;
  - pte_offset_map()
 	maps PTE, returns pointer to PTE, or returns NULL if no PTE table;
  - pte_unmap()

Documentation/translations/zh_CN/dev-tools/kasan.rst

@@ -422,16 +422,12 @@ KASAN连接到vmap基础架构以懒清理未使用的影子内存。
 ~~~~
 
 有一些KASAN测试可以验证KASAN是否正常工作并可以检测某些类型的内存损坏。
-测试由两部分组成:
 
-1. 与KUnit测试框架集成的测试。使用 ``CONFIG_KASAN_KUNIT_TEST`` 启用。
-这些测试可以通过几种不同的方式自动运行和部分验证；请参阅下面的说明。
+所有 KASAN 测试都与 KUnit 测试框架集成，可通过 ``CONFIG_KASAN_KUNIT_TEST`` 启用。
+测试可以通过几种不同的方式自动运行和部分验证；请参阅以下说明。
 
-2. 与KUnit不兼容的测试。使用 ``CONFIG_KASAN_MODULE_TEST`` 启用并且只能作为模块
-运行。这些测试只能通过加载内核模块并检查内核日志以获取KASAN报告来手动验证。
-
-如果检测到错误，每个KUnit兼容的KASAN测试都会打印多个KASAN报告之一，然后测试打印
-其编号和状态。
+如果检测到错误，每个 KASAN 测试都会打印多份 KASAN 报告中的一份。
+然后测试会打印其编号和状态。
 
 当测试通过::
 
@@ -458,16 +454,16 @@ KASAN连接到vmap基础架构以懒清理未使用的影子内存。
 
         not ok 1 - kasan
 
-有几种方法可以运行与KUnit兼容的KASAN测试。
+有几种方法可以运行 KASAN 测试。
 
 1. 可加载模块
 
-   启用 ``CONFIG_KUNIT`` 后，KASAN-KUnit测试可以构建为可加载模块，并通过使用
-   ``insmod`` 或 ``modprobe`` 加载 ``kasan_test.ko`` 来运行。
+   启用 ``CONFIG_KUNIT`` 后，可以将测试构建为可加载模块
+   并通过使用 ``insmod`` 或 ``modprobe`` 加载 ``kasan_test.ko`` 来运行。
 
 2. 内置
 
-   通过内置 ``CONFIG_KUNIT`` ，也可以内置KASAN-KUnit测试。在这种情况下，
+   通过内置 ``CONFIG_KUNIT``，测试也可以内置。
    测试将在启动时作为后期初始化调用运行。
 
 3. 使用kunit_tool

Documentation/translations/zh_TW/dev-tools/kasan.rst

@@ -404,16 +404,13 @@ KASAN連接到vmap基礎架構以懶清理未使用的影子內存。
 ~~~~
 
 有一些KASAN測試可以驗證KASAN是否正常工作並可以檢測某些類型的內存損壞。
-測試由兩部分組成:
 
-1. 與KUnit測試框架集成的測試。使用 ``CONFIG_KASAN_KUNIT_TEST`` 啓用。
-這些測試可以通過幾種不同的方式自動運行和部分驗證；請參閱下面的說明。
+所有 KASAN 測試均與 KUnit 測試框架集成，並且可以啟用
+透過 ``CONFIG_KASAN_KUNIT_TEST``。可以運行測試並進行部分驗證
+以幾種不同的方式自動進行；請參閱下面的說明。
 
-2. 與KUnit不兼容的測試。使用 ``CONFIG_KASAN_MODULE_TEST`` 啓用並且只能作爲模塊
-運行。這些測試只能通過加載內核模塊並檢查內核日誌以獲取KASAN報告來手動驗證。
-
-如果檢測到錯誤，每個KUnit兼容的KASAN測試都會打印多個KASAN報告之一，然後測試打印
-其編號和狀態。
+如果偵測到錯誤，每個 KASAN 測試都會列印多個 KASAN 報告之一。
+然後測試列印其編號和狀態。
 
 當測試通過::
 
@@ -440,16 +437,16 @@ KASAN連接到vmap基礎架構以懶清理未使用的影子內存。
 
         not ok 1 - kasan
 
-有幾種方法可以運行與KUnit兼容的KASAN測試。
+有幾種方法可以執行 KASAN 測試。
 
 1. 可加載模塊
 
-   啓用 ``CONFIG_KUNIT`` 後，KASAN-KUnit測試可以構建爲可加載模塊，並通過使用
-   ``insmod`` 或 ``modprobe`` 加載 ``kasan_test.ko`` 來運行。
+   啟用 ``CONFIG_KUNIT`` 後，測試可以建置為可載入模組
+   並且透過使用 ``insmod`` 或 ``modprobe`` 來載入 ``kasan_test.ko`` 來運作。
 
 2. 內置
 
-   通過內置 ``CONFIG_KUNIT`` ，也可以內置KASAN-KUnit測試。在這種情況下，
+   透過內建 ``CONFIG_KUNIT``，測試也可以內建。
    測試將在啓動時作爲後期初始化調用運行。
 
 3. 使用kunit_tool

MAINTAINERS

@@ -14957,6 +14957,8 @@ S:	Maintained
 W:	http://www.linux-mm.org
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
 T:	quilt git://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new
+F:	Documentation/admin-guide/mm/
+F:	Documentation/mm/
 F:	include/linux/gfp.h
 F:	include/linux/gfp_types.h
 F:	include/linux/memfd.h

arch/Kconfig

@@ -1025,6 +1025,14 @@ config ARCH_WANTS_EXECMEM_LATE
 	  enough entropy for module space randomization, for instance
 	  arm64.
 
+config ARCH_HAS_EXECMEM_ROX
+	bool
+	depends on MMU && !HIGHMEM
+	help
+	  For architectures that support allocations of executable memory
+	  with read-only execute permissions. Architecture must implement
+	  execmem_fill_trapping_insns() callback to enable this.
+
 config HAVE_IRQ_EXIT_ON_IRQ_STACK
 	bool
 	help

arch/alpha/include/asm/Kbuild

@@ -5,3 +5,4 @@ generic-y += agp.h
 generic-y += asm-offsets.h
 generic-y += kvm_para.h
 generic-y += mcs_spinlock.h
+generic-y += text-patching.h

arch/alpha/include/asm/page.h

@@ -14,7 +14,7 @@ extern void clear_page(void *page);
 #define clear_user_page(page, vaddr, pg)	clear_page(page)
 
 #define vma_alloc_zeroed_movable_folio(vma, vaddr) \
-	vma_alloc_folio(GFP_HIGHUSER_MOVABLE | __GFP_ZERO, 0, vma, vaddr, false)
+	vma_alloc_folio(GFP_HIGHUSER_MOVABLE | __GFP_ZERO, 0, vma, vaddr)
 
 extern void copy_page(void * _to, void * _from);
 #define copy_user_page(to, from, vaddr, pg)	copy_page(to, from)

arch/alpha/include/uapi/asm/mman.h

@@ -78,6 +78,9 @@
 
 #define MADV_COLLAPSE	25		/* Synchronous hugepage collapse */
 
+#define MADV_GUARD_INSTALL 102		/* fatal signal on access to range */
+#define MADV_GUARD_REMOVE 103		/* unguard range */
+
 /* compatibility flags */
 #define MAP_FILE	0
 

arch/arc/include/asm/Kbuild

@@ -6,3 +6,4 @@ generic-y += kvm_para.h
 generic-y += mcs_spinlock.h
 generic-y += parport.h
 generic-y += user.h
+generic-y += text-patching.h

arch/arm/kernel/ftrace.c

@@ -23,7 +23,7 @@
 #include <asm/insn.h>
 #include <asm/set_memory.h>
 #include <asm/stacktrace.h>
-#include <asm/patch.h>
+#include <asm/text-patching.h>
 
 /*
  * The compiler emitted profiling hook consists of

arch/arm/kernel/jump_label.c

@@ -1,7 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0
 #include <linux/kernel.h>
 #include <linux/jump_label.h>
-#include <asm/patch.h>
+#include <asm/text-patching.h>
 #include <asm/insn.h>
 
 static void __arch_jump_label_transform(struct jump_entry *entry,

arch/arm/kernel/kgdb.c

@@ -15,7 +15,7 @@
 #include <linux/kgdb.h>
 #include <linux/uaccess.h>
 
-#include <asm/patch.h>
+#include <asm/text-patching.h>
 #include <asm/traps.h>
 
 struct dbg_reg_def_t dbg_reg_def[DBG_MAX_REG_NUM] =

arch/arm/kernel/patch.c

@@ -9,7 +9,7 @@
 #include <asm/fixmap.h>
 #include <asm/smp_plat.h>
 #include <asm/opcodes.h>
-#include <asm/patch.h>
+#include <asm/text-patching.h>
 
 struct patch {
 	void *addr;

arch/arm/mm/fault-armv.c

@@ -61,32 +61,8 @@ static int do_adjust_pte(struct vm_area_struct *vma, unsigned long address,
 	return ret;
 }
 
-#if defined(CONFIG_SPLIT_PTE_PTLOCKS)
-/*
- * If we are using split PTE locks, then we need to take the page
- * lock here.  Otherwise we are using shared mm->page_table_lock
- * which is already locked, thus cannot take it.
- */
-static inline void do_pte_lock(spinlock_t *ptl)
-{
-	/*
-	 * Use nested version here to indicate that we are already
-	 * holding one similar spinlock.
-	 */
-	spin_lock_nested(ptl, SINGLE_DEPTH_NESTING);
-}
-
-static inline void do_pte_unlock(spinlock_t *ptl)
-{
-	spin_unlock(ptl);
-}
-#else /* !defined(CONFIG_SPLIT_PTE_PTLOCKS) */
-static inline void do_pte_lock(spinlock_t *ptl) {}
-static inline void do_pte_unlock(spinlock_t *ptl) {}
-#endif /* defined(CONFIG_SPLIT_PTE_PTLOCKS) */
-
 static int adjust_pte(struct vm_area_struct *vma, unsigned long address,
-	unsigned long pfn)
+		      unsigned long pfn, struct vm_fault *vmf)
 {
 	spinlock_t *ptl;
 	pgd_t *pgd;
@@ -94,6 +70,7 @@ static int adjust_pte(struct vm_area_struct *vma, unsigned long address,
 	pud_t *pud;
 	pmd_t *pmd;
 	pte_t *pte;
+	pmd_t pmdval;
 	int ret;
 
 	pgd = pgd_offset(vma->vm_mm, address);
@@ -112,20 +89,33 @@ static int adjust_pte(struct vm_area_struct *vma, unsigned long address,
 	if (pmd_none_or_clear_bad(pmd))
 		return 0;
 
+again:
 	/*
 	 * This is called while another page table is mapped, so we
 	 * must use the nested version.  This also means we need to
 	 * open-code the spin-locking.
 	 */
-	pte = pte_offset_map_nolock(vma->vm_mm, pmd, address, &ptl);
+	pte = pte_offset_map_rw_nolock(vma->vm_mm, pmd, address, &pmdval, &ptl);
 	if (!pte)
 		return 0;
 
-	do_pte_lock(ptl);
+	/*
+	 * If we are using split PTE locks, then we need to take the page
+	 * lock here.  Otherwise we are using shared mm->page_table_lock
+	 * which is already locked, thus cannot take it.
+	 */
+	if (ptl != vmf->ptl) {
+		spin_lock_nested(ptl, SINGLE_DEPTH_NESTING);
+		if (unlikely(!pmd_same(pmdval, pmdp_get_lockless(pmd)))) {
+			pte_unmap_unlock(pte, ptl);
+			goto again;
+		}
+	}
 
 	ret = do_adjust_pte(vma, address, pfn, pte);
 
-	do_pte_unlock(ptl);
+	if (ptl != vmf->ptl)
+		spin_unlock(ptl);
 	pte_unmap(pte);
 
 	return ret;
@@ -133,7 +123,8 @@ static int adjust_pte(struct vm_area_struct *vma, unsigned long address,
 
 static void
 make_coherent(struct address_space *mapping, struct vm_area_struct *vma,
-	unsigned long addr, pte_t *ptep, unsigned long pfn)
+	      unsigned long addr, pte_t *ptep, unsigned long pfn,
+	      struct vm_fault *vmf)
 {
 	struct mm_struct *mm = vma->vm_mm;
 	struct vm_area_struct *mpnt;
@@ -160,7 +151,7 @@ make_coherent(struct address_space *mapping, struct vm_area_struct *vma,
 		if (!(mpnt->vm_flags & VM_MAYSHARE))
 			continue;
 		offset = (pgoff - mpnt->vm_pgoff) << PAGE_SHIFT;
-		aliases += adjust_pte(mpnt, mpnt->vm_start + offset, pfn);
+		aliases += adjust_pte(mpnt, mpnt->vm_start + offset, pfn, vmf);
 	}
 	flush_dcache_mmap_unlock(mapping);
 	if (aliases)
@@ -203,7 +194,7 @@ void update_mmu_cache_range(struct vm_fault *vmf, struct vm_area_struct *vma,
 		__flush_dcache_folio(mapping, folio);
 	if (mapping) {
 		if (cache_is_vivt())
-			make_coherent(mapping, vma, addr, ptep, pfn);
+			make_coherent(mapping, vma, addr, ptep, pfn, vmf);
 		else if (vma->vm_flags & VM_EXEC)
 			__flush_icache_all();
 	}

arch/arm/probes/kprobes/core.c

@@ -25,7 +25,7 @@
 #include <asm/cacheflush.h>
 #include <linux/percpu.h>
 #include <linux/bug.h>
-#include <asm/patch.h>
+#include <asm/text-patching.h>
 #include <asm/sections.h>
 
 #include "../decode-arm.h"

arch/arm/probes/kprobes/opt-arm.c

@@ -14,7 +14,7 @@
 /* for arm_gen_branch */
 #include <asm/insn.h>
 /* for patch_text */
-#include <asm/patch.h>
+#include <asm/text-patching.h>
 
 #include "core.h"
 

arch/arm64/include/asm/memory.h

@@ -110,7 +110,7 @@
 #define PAGE_END		(_PAGE_END(VA_BITS_MIN))
 #endif /* CONFIG_KASAN */
 
-#define PHYSMEM_END		__pa(PAGE_END - 1)
+#define DIRECT_MAP_PHYSMEM_END	__pa(PAGE_END - 1)
 
 #define MIN_THREAD_SHIFT	(14 + KASAN_THREAD_SHIFT)
 

arch/arm64/include/asm/set_memory.h

@@ -13,6 +13,7 @@ int set_memory_valid(unsigned long addr, int numpages, int enable);
 
 int set_direct_map_invalid_noflush(struct page *page);
 int set_direct_map_default_noflush(struct page *page);
+int set_direct_map_valid_noflush(struct page *page, unsigned nr, bool valid);
 bool kernel_page_present(struct page *page);
 
 int set_memory_encrypted(unsigned long addr, int numpages);

arch/arm64/kernel/ftrace.c

@@ -15,7 +15,7 @@
 #include <asm/debug-monitors.h>
 #include <asm/ftrace.h>
 #include <asm/insn.h>
-#include <asm/patching.h>
+#include <asm/text-patching.h>
 
 #ifdef CONFIG_DYNAMIC_FTRACE_WITH_ARGS
 struct fregs_offset {

arch/arm64/kernel/jump_label.c

@@ -9,7 +9,7 @@
 #include <linux/jump_label.h>
 #include <linux/smp.h>
 #include <asm/insn.h>
-#include <asm/patching.h>
+#include <asm/text-patching.h>
 
 bool arch_jump_label_transform_queue(struct jump_entry *entry,
 				     enum jump_label_type type)

arch/arm64/kernel/kgdb.c

@@ -17,7 +17,7 @@
 
 #include <asm/debug-monitors.h>
 #include <asm/insn.h>
-#include <asm/patching.h>
+#include <asm/text-patching.h>
 #include <asm/traps.h>
 
 struct dbg_reg_def_t dbg_reg_def[DBG_MAX_REG_NUM] = {

arch/arm64/kernel/patching.c

@@ -10,7 +10,7 @@
 #include <asm/fixmap.h>
 #include <asm/insn.h>
 #include <asm/kprobes.h>
-#include <asm/patching.h>
+#include <asm/text-patching.h>
 #include <asm/sections.h>
 
 static DEFINE_RAW_SPINLOCK(patch_lock);

arch/arm64/kernel/probes/kprobes.c

@@ -27,7 +27,7 @@
 #include <asm/debug-monitors.h>
 #include <asm/insn.h>
 #include <asm/irq.h>
-#include <asm/patching.h>
+#include <asm/text-patching.h>
 #include <asm/ptrace.h>
 #include <asm/sections.h>
 #include <asm/system_misc.h>

arch/arm64/kernel/traps.c

@@ -41,7 +41,7 @@
 #include <asm/extable.h>
 #include <asm/insn.h>
 #include <asm/kprobes.h>
-#include <asm/patching.h>
+#include <asm/text-patching.h>
 #include <asm/traps.h>
 #include <asm/smp.h>
 #include <asm/stack_pointer.h>

arch/arm64/mm/fault.c

@@ -1023,7 +1023,7 @@ struct folio *vma_alloc_zeroed_movable_folio(struct vm_area_struct *vma,
 	if (vma->vm_flags & VM_MTE)
 		flags |= __GFP_ZEROTAGS;
 
-	return vma_alloc_folio(flags, 0, vma, vaddr, false);
+	return vma_alloc_folio(flags, 0, vma, vaddr);
 }
 
 void tag_clear_highpage(struct page *page)

arch/arm64/mm/pageattr.c

@@ -282,7 +282,23 @@ int realm_register_memory_enc_ops(void)
 	return arm64_mem_crypt_ops_register(&realm_crypt_ops);
 }
 
+int set_direct_map_valid_noflush(struct page *page, unsigned nr, bool valid)
+{
+	unsigned long addr = (unsigned long)page_address(page);
+
+	if (!can_set_direct_map())
+		return 0;
+
+	return set_memory_valid(addr, nr, valid);
+}
+
 #ifdef CONFIG_DEBUG_PAGEALLOC
+/*
+ * This is - apart from the return value - doing the same
+ * thing as the new set_direct_map_valid_noflush() function.
+ *
+ * Unify? Explain the conceptual differences?
+ */
 void __kernel_map_pages(struct page *page, int numpages, int enable)
 {
 	if (!can_set_direct_map())

arch/arm64/net/bpf_jit_comp.c

@@ -19,7 +19,7 @@
 #include <asm/cacheflush.h>
 #include <asm/debug-monitors.h>
 #include <asm/insn.h>
-#include <asm/patching.h>
+#include <asm/text-patching.h>
 #include <asm/set_memory.h>
 
 #include "bpf_jit.h"

arch/csky/include/asm/Kbuild

@@ -11,3 +11,4 @@ generic-y += qspinlock.h
 generic-y += parport.h
 generic-y += user.h
 generic-y += vmlinux.lds.h
+generic-y += text-patching.h

arch/hexagon/include/asm/Kbuild

@@ -5,3 +5,4 @@ generic-y += extable.h
 generic-y += iomap.h
 generic-y += kvm_para.h
 generic-y += mcs_spinlock.h
+generic-y += text-patching.h

arch/loongarch/include/asm/Kbuild

@@ -11,3 +11,4 @@ generic-y += ioctl.h
 generic-y += mmzone.h
 generic-y += statfs.h
 generic-y += param.h
+generic-y += text-patching.h

arch/loongarch/include/asm/hugetlb.h

@@ -16,12 +16,7 @@ static inline int prepare_hugepage_range(struct file *file,
 					 unsigned long len)
 {
 	unsigned long task_size = STACK_TOP;
-	struct hstate *h = hstate_file(file);
 
-	if (len & ~huge_page_mask(h))
-		return -EINVAL;
-	if (addr & ~huge_page_mask(h))
-		return -EINVAL;
 	if (len > task_size)
 		return -ENOMEM;
 	if (task_size - len < addr)

arch/loongarch/include/asm/pgtable.h

@@ -268,8 +268,11 @@ extern void set_pmd_at(struct mm_struct *mm, unsigned long addr, pmd_t *pmdp, pm
  */
 extern void pgd_init(void *addr);
 extern void pud_init(void *addr);
+#define pud_init pud_init
 extern void pmd_init(void *addr);
+#define pmd_init pmd_init
 extern void kernel_pte_init(void *addr);
+#define kernel_pte_init kernel_pte_init
 
 /*
  * Encode/decode swap entries and swap PTEs. Swap PTEs are all PTEs that

arch/loongarch/include/asm/set_memory.h

@@ -17,5 +17,6 @@ int set_memory_rw(unsigned long addr, int numpages);
 bool kernel_page_present(struct page *page);
 int set_direct_map_default_noflush(struct page *page);
 int set_direct_map_invalid_noflush(struct page *page);
+int set_direct_map_valid_noflush(struct page *page, unsigned nr, bool valid);
 
 #endif /* _ASM_LOONGARCH_SET_MEMORY_H */

arch/loongarch/mm/pageattr.c

@@ -216,3 +216,22 @@ int set_direct_map_invalid_noflush(struct page *page)
 
 	return __set_memory(addr, 1, __pgprot(0), __pgprot(_PAGE_PRESENT | _PAGE_VALID));
 }
+
+int set_direct_map_valid_noflush(struct page *page, unsigned nr, bool valid)
+{
+	unsigned long addr = (unsigned long)page_address(page);
+	pgprot_t set, clear;
+
+	if (addr < vm_map_base)
+		return 0;
+
+	if (valid) {
+		set = PAGE_KERNEL;
+		clear = __pgprot(0);
+	} else {
+		set = __pgprot(0);
+		clear = __pgprot(_PAGE_PRESENT | _PAGE_VALID);
+	}
+
+	return __set_memory(addr, 1, set, clear);
+}

arch/m68k/include/asm/Kbuild

@@ -4,3 +4,4 @@ generic-y += extable.h
 generic-y += kvm_para.h
 generic-y += mcs_spinlock.h
 generic-y += spinlock.h
+generic-y += text-patching.h

arch/m68k/include/asm/page_no.h

@@ -14,7 +14,7 @@ extern unsigned long memory_end;
 #define copy_user_page(to, from, vaddr, pg)	copy_page(to, from)
 
 #define vma_alloc_zeroed_movable_folio(vma, vaddr) \
-	vma_alloc_folio(GFP_HIGHUSER_MOVABLE | __GFP_ZERO, 0, vma, vaddr, false)
+	vma_alloc_folio(GFP_HIGHUSER_MOVABLE | __GFP_ZERO, 0, vma, vaddr)
 
 #define __pa(vaddr)		((unsigned long)(vaddr))
 #define __va(paddr)		((void *)((unsigned long)(paddr)))

arch/microblaze/include/asm/Kbuild

@@ -8,3 +8,4 @@ generic-y += parport.h
 generic-y += syscalls.h
 generic-y += tlb.h
 generic-y += user.h
+generic-y += text-patching.h

arch/mips/include/asm/Kbuild

@@ -13,3 +13,4 @@ generic-y += parport.h
 generic-y += qrwlock.h
 generic-y += qspinlock.h
 generic-y += user.h
+generic-y += text-patching.h

arch/mips/include/asm/hugetlb.h

@@ -17,12 +17,7 @@ static inline int prepare_hugepage_range(struct file *file,
 					 unsigned long len)
 {
 	unsigned long task_size = STACK_TOP;
-	struct hstate *h = hstate_file(file);
 
-	if (len & ~huge_page_mask(h))
-		return -EINVAL;
-	if (addr & ~huge_page_mask(h))
-		return -EINVAL;
 	if (len > task_size)
 		return -ENOMEM;
 	if (task_size - len < addr)

arch/mips/include/asm/pgtable-64.h

@@ -317,7 +317,9 @@ static inline pmd_t *pud_pgtable(pud_t pud)
  */
 extern void pgd_init(void *addr);
 extern void pud_init(void *addr);
+#define pud_init pud_init
 extern void pmd_init(void *addr);
+#define pmd_init pmd_init
 
 /*
  * Encode/decode swap entries and swap PTEs. Swap PTEs are all PTEs that

arch/mips/include/uapi/asm/mman.h

@@ -105,6 +105,9 @@
 
 #define MADV_COLLAPSE	25		/* Synchronous hugepage collapse */
 
+#define MADV_GUARD_INSTALL 102		/* fatal signal on access to range */
+#define MADV_GUARD_REMOVE 103		/* unguard range */
+
 /* compatibility flags */
 #define MAP_FILE	0
 

arch/nios2/include/asm/Kbuild

@@ -7,3 +7,4 @@ generic-y += kvm_para.h
 generic-y += mcs_spinlock.h
 generic-y += spinlock.h
 generic-y += user.h
+generic-y += text-patching.h

arch/openrisc/include/asm/Kbuild

@@ -9,3 +9,4 @@ generic-y += spinlock.h
 generic-y += qrwlock_types.h
 generic-y += qrwlock.h
 generic-y += user.h
+generic-y += text-patching.h

arch/parisc/include/asm/hugetlb.h

@@ -12,21 +12,6 @@ void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
 pte_t huge_ptep_get_and_clear(struct mm_struct *mm, unsigned long addr,
 			      pte_t *ptep);
 
-/*
- * If the arch doesn't supply something else, assume that hugepage
- * size aligned regions are ok without further preparation.
- */
-#define __HAVE_ARCH_PREPARE_HUGEPAGE_RANGE
-static inline int prepare_hugepage_range(struct file *file,
-			unsigned long addr, unsigned long len)
-{
-	if (len & ~HPAGE_MASK)
-		return -EINVAL;
-	if (addr & ~HPAGE_MASK)
-		return -EINVAL;
-	return 0;
-}
-
 #define __HAVE_ARCH_HUGE_PTEP_CLEAR_FLUSH
 static inline pte_t huge_ptep_clear_flush(struct vm_area_struct *vma,
 					  unsigned long addr, pte_t *ptep)

arch/parisc/include/uapi/asm/mman.h

@@ -75,6 +75,9 @@
 #define MADV_HWPOISON     100		/* poison a page for testing */
 #define MADV_SOFT_OFFLINE 101		/* soft offline page for testing */
 
+#define MADV_GUARD_INSTALL 102		/* fatal signal on access to range */
+#define MADV_GUARD_REMOVE 103		/* unguard range */
+
 /* compatibility flags */
 #define MAP_FILE	0
 

arch/parisc/kernel/ftrace.c

@@ -20,7 +20,7 @@
 #include <asm/assembly.h>
 #include <asm/sections.h>
 #include <asm/ftrace.h>
-#include <asm/patch.h>
+#include <asm/text-patching.h>
 
 #define __hot __section(".text.hot")
 

arch/parisc/kernel/jump_label.c

@@ -8,7 +8,7 @@
 #include <linux/jump_label.h>
 #include <linux/bug.h>
 #include <asm/alternative.h>
-#include <asm/patch.h>
+#include <asm/text-patching.h>
 
 static inline int reassemble_17(int as17)
 {

arch/parisc/kernel/kgdb.c

@@ -16,7 +16,7 @@
 #include <asm/ptrace.h>
 #include <asm/traps.h>
 #include <asm/processor.h>
-#include <asm/patch.h>
+#include <asm/text-patching.h>
 #include <asm/cacheflush.h>
 
 const struct kgdb_arch arch_kgdb_ops = {

arch/parisc/kernel/kprobes.c

@@ -12,7 +12,7 @@
 #include <linux/kprobes.h>
 #include <linux/slab.h>
 #include <asm/cacheflush.h>
-#include <asm/patch.h>
+#include <asm/text-patching.h>
 
 DEFINE_PER_CPU(struct kprobe *, current_kprobe) = NULL;
 DEFINE_PER_CPU(struct kprobe_ctlblk, kprobe_ctlblk);

arch/parisc/kernel/patch.c

@@ -13,7 +13,7 @@
 
 #include <asm/cacheflush.h>
 #include <asm/fixmap.h>
-#include <asm/patch.h>
+#include <asm/text-patching.h>
 
 struct patch {
 	void *addr;

arch/parisc/mm/hugetlbpage.c

@@ -21,27 +21,6 @@
 #include <asm/mmu_context.h>
 
 
-unsigned long
-hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
-		unsigned long len, unsigned long pgoff, unsigned long flags)
-{
-	struct hstate *h = hstate_file(file);
-
-	if (len & ~huge_page_mask(h))
-		return -EINVAL;
-	if (len > TASK_SIZE)
-		return -ENOMEM;
-
-	if (flags & MAP_FIXED)
-		if (prepare_hugepage_range(file, addr, len))
-			return -EINVAL;
-
-	if (addr)
-		addr = ALIGN(addr, huge_page_size(h));
-
-	/* we need to make sure the colouring is OK */
-	return arch_get_unmapped_area(file, addr, len, pgoff, flags, 0);
-}
 
 
 pte_t *huge_pte_alloc(struct mm_struct *mm, struct vm_area_struct *vma,

arch/powerpc/include/asm/kprobes.h

@@ -21,7 +21,7 @@
 #include <linux/percpu.h>
 #include <linux/module.h>
 #include <asm/probes.h>
-#include <asm/code-patching.h>
+#include <asm/text-patching.h>
 
 #ifdef CONFIG_KPROBES
 #define  __ARCH_WANT_KPROBES_INSN_SLOT

arch/powerpc/kernel/crash_dump.c

@@ -13,7 +13,7 @@
 #include <linux/io.h>
 #include <linux/memblock.h>
 #include <linux/of.h>
-#include <asm/code-patching.h>
+#include <asm/text-patching.h>
 #include <asm/kdump.h>
 #include <asm/firmware.h>
 #include <linux/uio.h>

arch/powerpc/kernel/epapr_paravirt.c

@@ -9,7 +9,7 @@
 #include <linux/of_fdt.h>
 #include <asm/epapr_hcalls.h>
 #include <asm/cacheflush.h>
-#include <asm/code-patching.h>
+#include <asm/text-patching.h>
 #include <asm/machdep.h>
 #include <asm/inst.h>
 

arch/powerpc/kernel/jump_label.c

@@ -5,7 +5,7 @@
 
 #include <linux/kernel.h>
 #include <linux/jump_label.h>
-#include <asm/code-patching.h>
+#include <asm/text-patching.h>
 #include <asm/inst.h>
 
 void arch_jump_label_transform(struct jump_entry *entry,

arch/powerpc/kernel/kgdb.c

@@ -21,7 +21,7 @@
 #include <asm/processor.h>
 #include <asm/machdep.h>
 #include <asm/debug.h>
-#include <asm/code-patching.h>
+#include <asm/text-patching.h>
 #include <linux/slab.h>
 #include <asm/inst.h>
 

arch/powerpc/kernel/kprobes.c

@@ -21,7 +21,7 @@
 #include <linux/slab.h>
 #include <linux/set_memory.h>
 #include <linux/execmem.h>
-#include <asm/code-patching.h>
+#include <asm/text-patching.h>
 #include <asm/cacheflush.h>
 #include <asm/sstep.h>
 #include <asm/sections.h>

arch/powerpc/kernel/module_32.c

@@ -18,7 +18,7 @@
 #include <linux/bug.h>
 #include <linux/sort.h>
 #include <asm/setup.h>
-#include <asm/code-patching.h>
+#include <asm/text-patching.h>
 
 /* Count how many different relocations (different symbol, different
    addend) */

arch/powerpc/kernel/module_64.c

@@ -17,7 +17,7 @@
 #include <linux/kernel.h>
 #include <asm/module.h>
 #include <asm/firmware.h>
-#include <asm/code-patching.h>
+#include <asm/text-patching.h>
 #include <linux/sort.h>
 #include <asm/setup.h>
 #include <asm/sections.h>

arch/powerpc/kernel/optprobes.c

@@ -13,7 +13,7 @@
 #include <asm/kprobes.h>
 #include <asm/ptrace.h>
 #include <asm/cacheflush.h>
-#include <asm/code-patching.h>
+#include <asm/text-patching.h>
 #include <asm/sstep.h>
 #include <asm/ppc-opcode.h>
 #include <asm/inst.h>

arch/powerpc/kernel/process.c

@@ -54,7 +54,7 @@
 #include <asm/firmware.h>
 #include <asm/hw_irq.h>
 #endif
-#include <asm/code-patching.h>
+#include <asm/text-patching.h>
 #include <asm/exec.h>
 #include <asm/livepatch.h>
 #include <asm/cpu_has_feature.h>

arch/powerpc/kernel/security.c

@@ -14,7 +14,7 @@
 #include <linux/debugfs.h>
 
 #include <asm/asm-prototypes.h>
-#include <asm/code-patching.h>
+#include <asm/text-patching.h>
 #include <asm/security_features.h>
 #include <asm/sections.h>
 #include <asm/setup.h>

arch/powerpc/kernel/setup_32.c

@@ -40,7 +40,7 @@
 #include <asm/time.h>
 #include <asm/serial.h>
 #include <asm/udbg.h>
-#include <asm/code-patching.h>
+#include <asm/text-patching.h>
 #include <asm/cpu_has_feature.h>
 #include <asm/asm-prototypes.h>
 #include <asm/kdump.h>

arch/powerpc/kernel/setup_64.c

@@ -60,7 +60,7 @@
 #include <asm/xmon.h>
 #include <asm/udbg.h>
 #include <asm/kexec.h>
-#include <asm/code-patching.h>
+#include <asm/text-patching.h>
 #include <asm/ftrace.h>
 #include <asm/opal.h>
 #include <asm/cputhreads.h>

arch/powerpc/kernel/static_call.c

@@ -2,7 +2,7 @@
 #include <linux/memory.h>
 #include <linux/static_call.h>
 
-#include <asm/code-patching.h>
+#include <asm/text-patching.h>
 
 void arch_static_call_transform(void *site, void *tramp, void *func, bool tail)
 {

arch/powerpc/kernel/trace/ftrace.c

@@ -23,7 +23,7 @@
 #include <linux/list.h>
 
 #include <asm/cacheflush.h>
-#include <asm/code-patching.h>
+#include <asm/text-patching.h>
 #include <asm/ftrace.h>
 #include <asm/syscall.h>
 #include <asm/inst.h>

arch/powerpc/kernel/trace/ftrace_64_pg.c

@@ -23,7 +23,7 @@
 #include <linux/list.h>
 
 #include <asm/cacheflush.h>
-#include <asm/code-patching.h>
+#include <asm/text-patching.h>
 #include <asm/ftrace.h>
 #include <asm/syscall.h>
 #include <asm/inst.h>

arch/powerpc/lib/code-patching.c

@@ -17,7 +17,7 @@
 #include <asm/tlb.h>
 #include <asm/tlbflush.h>
 #include <asm/page.h>
-#include <asm/code-patching.h>
+#include <asm/text-patching.h>
 #include <asm/inst.h>
 
 static int __patch_mem(void *exec_addr, unsigned long val, void *patch_addr, bool is_dword)

arch/powerpc/lib/feature-fixups.c

@@ -16,7 +16,7 @@
 #include <linux/sched/mm.h>
 #include <linux/stop_machine.h>
 #include <asm/cputable.h>
-#include <asm/code-patching.h>
+#include <asm/text-patching.h>
 #include <asm/interrupt.h>
 #include <asm/page.h>
 #include <asm/sections.h>

arch/powerpc/lib/test-code-patching.c

@@ -6,7 +6,7 @@
 #include <linux/vmalloc.h>
 #include <linux/init.h>
 
-#include <asm/code-patching.h>
+#include <asm/text-patching.h>
 
 static int __init instr_is_branch_to_addr(const u32 *instr, unsigned long addr)
 {

arch/powerpc/lib/test_emulate_step.c

@@ -11,7 +11,7 @@
 #include <asm/cpu_has_feature.h>
 #include <asm/sstep.h>
 #include <asm/ppc-opcode.h>
-#include <asm/code-patching.h>
+#include <asm/text-patching.h>
 #include <asm/inst.h>
 
 #define MAX_SUBTESTS	16

arch/powerpc/mm/book3s32/mmu.c

@@ -25,7 +25,7 @@
 
 #include <asm/mmu.h>
 #include <asm/machdep.h>
-#include <asm/code-patching.h>
+#include <asm/text-patching.h>
 #include <asm/sections.h>
 
 #include <mm/mmu_decl.h>

arch/powerpc/mm/book3s64/hash_utils.c

@@ -57,7 +57,7 @@
 #include <asm/sections.h>
 #include <asm/copro.h>
 #include <asm/udbg.h>
-#include <asm/code-patching.h>
+#include <asm/text-patching.h>
 #include <asm/fadump.h>
 #include <asm/firmware.h>
 #include <asm/tm.h>

arch/powerpc/mm/book3s64/slb.c

@@ -24,7 +24,7 @@
 #include <linux/pgtable.h>
 
 #include <asm/udbg.h>
-#include <asm/code-patching.h>
+#include <asm/text-patching.h>
 
 #include "internal.h"
 

arch/powerpc/mm/book3s64/slice.c

@@ -633,6 +633,20 @@ return_addr:
 }
 EXPORT_SYMBOL_GPL(slice_get_unmapped_area);
 
+#ifdef CONFIG_HUGETLB_PAGE
+static int file_to_psize(struct file *file)
+{
+	struct hstate *hstate = hstate_file(file);
+
+	return shift_to_mmu_psize(huge_page_shift(hstate));
+}
+#else
+static int file_to_psize(struct file *file)
+{
+	return 0;
+}
+#endif
+
 unsigned long arch_get_unmapped_area(struct file *filp,
 				     unsigned long addr,
 				     unsigned long len,
@@ -640,11 +654,17 @@ unsigned long arch_get_unmapped_area(struct file *filp,
 				     unsigned long flags,
 				     vm_flags_t vm_flags)
 {
+	unsigned int psize;
+
 	if (radix_enabled())
 		return generic_get_unmapped_area(filp, addr, len, pgoff, flags, vm_flags);
 
-	return slice_get_unmapped_area(addr, len, flags,
-				       mm_ctx_user_psize(&current->mm->context), 0);
+	if (filp && is_file_hugepages(filp))
+		psize = file_to_psize(filp);
+	else
+		psize = mm_ctx_user_psize(&current->mm->context);
+
+	return slice_get_unmapped_area(addr, len, flags, psize, 0);
 }
 
 unsigned long arch_get_unmapped_area_topdown(struct file *filp,
@@ -654,11 +674,17 @@ unsigned long arch_get_unmapped_area_topdown(struct file *filp,
 					     const unsigned long flags,
 					     vm_flags_t vm_flags)
 {
+	unsigned int psize;
+
 	if (radix_enabled())
 		return generic_get_unmapped_area_topdown(filp, addr0, len, pgoff, flags, vm_flags);
 
-	return slice_get_unmapped_area(addr0, len, flags,
-				       mm_ctx_user_psize(&current->mm->context), 1);
+	if (filp && is_file_hugepages(filp))
+		psize = file_to_psize(filp);
+	else
+		psize = mm_ctx_user_psize(&current->mm->context);
+
+	return slice_get_unmapped_area(addr0, len, flags, psize, 1);
 }
 
 unsigned int notrace get_slice_psize(struct mm_struct *mm, unsigned long addr)
@@ -788,20 +814,4 @@ unsigned long vma_mmu_pagesize(struct vm_area_struct *vma)
 
 	return 1UL << mmu_psize_to_shift(get_slice_psize(vma->vm_mm, vma->vm_start));
 }
-
-static int file_to_psize(struct file *file)
-{
-	struct hstate *hstate = hstate_file(file);
-	return shift_to_mmu_psize(huge_page_shift(hstate));
-}
-
-unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
-					unsigned long len, unsigned long pgoff,
-					unsigned long flags)
-{
-	if (radix_enabled())
-		return generic_hugetlb_get_unmapped_area(file, addr, len, pgoff, flags);
-
-	return slice_get_unmapped_area(addr, len, flags, file_to_psize(file), 1);
-}
 #endif

arch/powerpc/mm/kasan/init_32.c

@@ -7,7 +7,7 @@
 #include <linux/memblock.h>
 #include <linux/sched/task.h>
 #include <asm/pgalloc.h>
-#include <asm/code-patching.h>
+#include <asm/text-patching.h>
 #include <mm/mmu_decl.h>
 
 static pgprot_t __init kasan_prot_ro(void)

arch/powerpc/mm/mem.c

@@ -26,7 +26,7 @@
 #include <asm/svm.h>
 #include <asm/mmzone.h>
 #include <asm/ftrace.h>
-#include <asm/code-patching.h>
+#include <asm/text-patching.h>
 #include <asm/setup.h>
 #include <asm/fixmap.h>
 

arch/powerpc/mm/nohash/44x.c

@@ -24,7 +24,7 @@
 #include <asm/mmu.h>
 #include <asm/page.h>
 #include <asm/cacheflush.h>
-#include <asm/code-patching.h>
+#include <asm/text-patching.h>
 #include <asm/smp.h>
 
 #include <mm/mmu_decl.h>

arch/powerpc/mm/nohash/book3e_pgtable.c

@@ -10,7 +10,7 @@
 #include <asm/pgalloc.h>
 #include <asm/tlb.h>
 #include <asm/dma.h>
-#include <asm/code-patching.h>
+#include <asm/text-patching.h>
 
 #include <mm/mmu_decl.h>
 

arch/powerpc/mm/nohash/tlb.c

@@ -37,7 +37,7 @@
 #include <asm/pgalloc.h>
 #include <asm/tlbflush.h>
 #include <asm/tlb.h>
-#include <asm/code-patching.h>
+#include <asm/text-patching.h>
 #include <asm/cputhreads.h>
 #include <asm/hugetlb.h>
 #include <asm/paca.h>

arch/powerpc/mm/nohash/tlb_64e.c

@@ -24,7 +24,7 @@
 #include <asm/pgalloc.h>
 #include <asm/tlbflush.h>
 #include <asm/tlb.h>
-#include <asm/code-patching.h>
+#include <asm/text-patching.h>
 #include <asm/cputhreads.h>
 
 #include <mm/mmu_decl.h>

arch/powerpc/mm/pgtable.c

@@ -398,7 +398,7 @@ void assert_pte_locked(struct mm_struct *mm, unsigned long addr)
 	 */
 	if (pmd_none(*pmd))
 		return;
-	pte = pte_offset_map_nolock(mm, pmd, addr, &ptl);
+	pte = pte_offset_map_ro_nolock(mm, pmd, addr, &ptl);
 	BUG_ON(!pte);
 	assert_spin_locked(ptl);
 	pte_unmap(pte);

arch/powerpc/net/bpf_jit_comp.c

@@ -18,7 +18,7 @@
 #include <linux/bpf.h>
 
 #include <asm/kprobes.h>
-#include <asm/code-patching.h>
+#include <asm/text-patching.h>
 
 #include "bpf_jit.h"
 

arch/powerpc/perf/8xx-pmu.c

@@ -14,7 +14,7 @@
 #include <asm/machdep.h>
 #include <asm/firmware.h>
 #include <asm/ptrace.h>
-#include <asm/code-patching.h>
+#include <asm/text-patching.h>
 #include <asm/inst.h>
 
 #define PERF_8xx_ID_CPU_CYCLES		1

arch/powerpc/perf/core-book3s.c

@@ -16,7 +16,7 @@
 #include <asm/machdep.h>
 #include <asm/firmware.h>
 #include <asm/ptrace.h>
-#include <asm/code-patching.h>
+#include <asm/text-patching.h>
 #include <asm/hw_irq.h>
 #include <asm/interrupt.h>
 

arch/powerpc/platforms/85xx/smp.c

@@ -23,7 +23,7 @@
 #include <asm/mpic.h>
 #include <asm/cacheflush.h>
 #include <asm/dbell.h>
-#include <asm/code-patching.h>
+#include <asm/text-patching.h>
 #include <asm/cputhreads.h>
 #include <asm/fsl_pm.h>
 

arch/powerpc/platforms/86xx/mpc86xx_smp.c

@@ -12,7 +12,7 @@
 #include <linux/delay.h>
 #include <linux/pgtable.h>
 
-#include <asm/code-patching.h>
+#include <asm/text-patching.h>
 #include <asm/page.h>
 #include <asm/pci-bridge.h>
 #include <asm/mpic.h>