patches/old/mm-add-const-to-lots-of-pointer-parameters.patch

From: Max Kellermann <max.kellermann@ionos.com>
Subject: mm: add `const` to lots of pointer parameters
Date: Wed, 27 Aug 2025 21:22:33 +0200

For improved const-correctness.

Link: https://lkml.kernel.org/r/20250827192233.447920-1-max.kellermann@ionos.com
Signed-off-by: Max Kellermann <max.kellermann@ionos.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 include/linux/fs.h        |    6 ++--
 include/linux/mm.h        |   42 ++++++++++++++---------------
 include/linux/mm_inline.h |   24 ++++++++--------
 include/linux/mm_types.h  |    4 +-
 include/linux/mmzone.h    |   42 ++++++++++++++---------------
 include/linux/pagemap.h   |   52 ++++++++++++++++++------------------
 include/linux/pagevec.h   |    4 +-
 include/linux/shmem_fs.h  |    4 +-
 mm/oom_kill.c             |    2 -
 mm/shmem.c                |    6 ++--
 mm/util.c                 |    2 -
 11 files changed, 94 insertions(+), 94 deletions(-)

--- a/include/linux/fs.h~mm-add-const-to-lots-of-pointer-parameters
+++ a/include/linux/fs.h
@@ -537,7 +537,7 @@ struct address_space {
 /*
  * Returns true if any of the pages in the mapping are marked with the tag.
  */
-static inline bool mapping_tagged(struct address_space *mapping, xa_mark_t tag)
+static inline bool mapping_tagged(const struct address_space *mapping, xa_mark_t tag)
 {
 	return xa_marked(&mapping->i_pages, tag);
 }
@@ -585,7 +585,7 @@ static inline void i_mmap_assert_write_l
 /*
  * Might pages of this file be mapped into userspace?
  */
-static inline int mapping_mapped(struct address_space *mapping)
+static inline int mapping_mapped(const struct address_space *mapping)
 {
 	return	!RB_EMPTY_ROOT(&mapping->i_mmap.rb_root);
 }
@@ -599,7 +599,7 @@ static inline int mapping_mapped(struct
  * If i_mmap_writable is negative, no new writable mappings are allowed. You
  * can only deny writable mappings, if none exists right now.
  */
-static inline int mapping_writably_mapped(struct address_space *mapping)
+static inline int mapping_writably_mapped(const struct address_space *mapping)
 {
 	return atomic_read(&mapping->i_mmap_writable) > 0;
 }
--- a/include/linux/mm.h~mm-add-const-to-lots-of-pointer-parameters
+++ a/include/linux/mm.h
@@ -716,7 +716,7 @@ static inline void release_fault_lock(st
 	mmap_read_unlock(vmf->vma->vm_mm);
 }
 
-static inline void assert_fault_locked(struct vm_fault *vmf)
+static inline void assert_fault_locked(const struct vm_fault *vmf)
 {
 	mmap_assert_locked(vmf->vma->vm_mm);
 }
@@ -859,7 +859,7 @@ static inline bool vma_is_initial_stack(
 		vma->vm_end >= vma->vm_mm->start_stack;
 }
 
-static inline bool vma_is_temporary_stack(struct vm_area_struct *vma)
+static inline bool vma_is_temporary_stack(const struct vm_area_struct *vma)
 {
 	int maybe_stack = vma->vm_flags & (VM_GROWSDOWN | VM_GROWSUP);
 
@@ -873,7 +873,7 @@ static inline bool vma_is_temporary_stac
 	return false;
 }
 
-static inline bool vma_is_foreign(struct vm_area_struct *vma)
+static inline bool vma_is_foreign(const struct vm_area_struct *vma)
 {
 	if (!current->mm)
 		return true;
@@ -884,7 +884,7 @@ static inline bool vma_is_foreign(struct
 	return false;
 }
 
-static inline bool vma_is_accessible(struct vm_area_struct *vma)
+static inline bool vma_is_accessible(const struct vm_area_struct *vma)
 {
 	return vma->vm_flags & VM_ACCESS_FLAGS;
 }
@@ -895,7 +895,7 @@ static inline bool is_shared_maywrite(vm
 		(VM_SHARED | VM_MAYWRITE);
 }
 
-static inline bool vma_is_shared_maywrite(struct vm_area_struct *vma)
+static inline bool vma_is_shared_maywrite(const struct vm_area_struct *vma)
 {
 	return is_shared_maywrite(vma->vm_flags);
 }
@@ -979,14 +979,14 @@ static inline void vma_iter_set(struct v
  * The vma_is_shmem is not inline because it is used only by slow
  * paths in userfault.
  */
-bool vma_is_shmem(struct vm_area_struct *vma);
-bool vma_is_anon_shmem(struct vm_area_struct *vma);
+bool vma_is_shmem(const struct vm_area_struct *vma);
+bool vma_is_anon_shmem(const struct vm_area_struct *vma);
 #else
-static inline bool vma_is_shmem(struct vm_area_struct *vma) { return false; }
-static inline bool vma_is_anon_shmem(struct vm_area_struct *vma) { return false; }
+static inline bool vma_is_shmem(const struct vm_area_struct *vma) { return false; }
+static inline bool vma_is_anon_shmem(const struct vm_area_struct *vma) { return false; }
 #endif
 
-int vma_is_stack_for_current(struct vm_area_struct *vma);
+int vma_is_stack_for_current(const struct vm_area_struct *vma);
 
 /* flush_tlb_range() takes a vma, not a mm, and can care about flags */
 #define TLB_FLUSH_VMA(mm,flags) { .vm_mm = (mm), .vm_flags = (flags) }
@@ -3488,7 +3488,7 @@ struct vm_area_struct *vma_lookup(struct
 	return mtree_load(&mm->mm_mt, addr);
 }
 
-static inline unsigned long stack_guard_start_gap(struct vm_area_struct *vma)
+static inline unsigned long stack_guard_start_gap(const struct vm_area_struct *vma)
 {
 	if (vma->vm_flags & VM_GROWSDOWN)
 		return stack_guard_gap;
@@ -3500,7 +3500,7 @@ static inline unsigned long stack_guard_
 	return 0;
 }
 
-static inline unsigned long vm_start_gap(struct vm_area_struct *vma)
+static inline unsigned long vm_start_gap(const struct vm_area_struct *vma)
 {
 	unsigned long gap = stack_guard_start_gap(vma);
 	unsigned long vm_start = vma->vm_start;
@@ -3511,7 +3511,7 @@ static inline unsigned long vm_start_gap
 	return vm_start;
 }
 
-static inline unsigned long vm_end_gap(struct vm_area_struct *vma)
+static inline unsigned long vm_end_gap(const struct vm_area_struct *vma)
 {
 	unsigned long vm_end = vma->vm_end;
 
@@ -3523,7 +3523,7 @@ static inline unsigned long vm_end_gap(s
 	return vm_end;
 }
 
-static inline unsigned long vma_pages(struct vm_area_struct *vma)
+static inline unsigned long vma_pages(const struct vm_area_struct *vma)
 {
 	return (vma->vm_end - vma->vm_start) >> PAGE_SHIFT;
 }
@@ -3540,7 +3540,7 @@ static inline struct vm_area_struct *fin
 	return vma;
 }
 
-static inline bool range_in_vma(struct vm_area_struct *vma,
+static inline bool range_in_vma(const struct vm_area_struct *vma,
 				unsigned long start, unsigned long end)
 {
 	return (vma && vma->vm_start <= start && end <= vma->vm_end);
@@ -3656,7 +3656,7 @@ static inline int vm_fault_to_errno(vm_f
  * Indicates whether GUP can follow a PROT_NONE mapped page, or whether
  * a (NUMA hinting) fault is required.
  */
-static inline bool gup_can_follow_protnone(struct vm_area_struct *vma,
+static inline bool gup_can_follow_protnone(const struct vm_area_struct *vma,
 					   unsigned int flags)
 {
 	/*
@@ -3786,7 +3786,7 @@ static inline bool debug_guardpage_enabl
 	return static_branch_unlikely(&_debug_guardpage_enabled);
 }
 
-static inline bool page_is_guard(struct page *page)
+static inline bool page_is_guard(const struct page *page)
 {
 	if (!debug_guardpage_enabled())
 		return false;
@@ -3817,7 +3817,7 @@ static inline void debug_pagealloc_map_p
 static inline void debug_pagealloc_unmap_pages(struct page *page, int numpages) {}
 static inline unsigned int debug_guardpage_minorder(void) { return 0; }
 static inline bool debug_guardpage_enabled(void) { return false; }
-static inline bool page_is_guard(struct page *page) { return false; }
+static inline bool page_is_guard(const struct page *page) { return false; }
 static inline bool set_page_guard(struct zone *zone, struct page *page,
 			unsigned int order) { return false; }
 static inline void clear_page_guard(struct zone *zone, struct page *page,
@@ -3840,7 +3840,7 @@ static inline int in_gate_area(struct mm
 }
 #endif	/* __HAVE_ARCH_GATE_AREA */
 
-extern bool process_shares_mm(struct task_struct *p, struct mm_struct *mm);
+extern bool process_shares_mm(struct task_struct *p, const struct mm_struct *mm);
 
 void drop_slab(void);
 
@@ -3899,7 +3899,7 @@ void vmemmap_free(unsigned long start, u
 #endif
 
 #ifdef CONFIG_SPARSEMEM_VMEMMAP
-static inline unsigned long vmem_altmap_offset(struct vmem_altmap *altmap)
+static inline unsigned long vmem_altmap_offset(const struct vmem_altmap *altmap)
 {
 	/* number of pfns from base where pfn_to_page() is valid */
 	if (altmap)
@@ -3913,7 +3913,7 @@ static inline void vmem_altmap_free(stru
 	altmap->alloc -= nr_pfns;
 }
 #else
-static inline unsigned long vmem_altmap_offset(struct vmem_altmap *altmap)
+static inline unsigned long vmem_altmap_offset(const struct vmem_altmap *altmap)
 {
 	return 0;
 }
--- a/include/linux/mm_inline.h~mm-add-const-to-lots-of-pointer-parameters
+++ a/include/linux/mm_inline.h
@@ -25,7 +25,7 @@
  * 0 if @folio is a normal anonymous folio, a tmpfs folio or otherwise
  * ram or swap backed folio.
  */
-static inline int folio_is_file_lru(struct folio *folio)
+static inline int folio_is_file_lru(const struct folio *folio)
 {
 	return !folio_test_swapbacked(folio);
 }
@@ -84,7 +84,7 @@ static __always_inline void __folio_clea
  * Return: The LRU list a folio should be on, as an index
  * into the array of LRU lists.
  */
-static __always_inline enum lru_list folio_lru_list(struct folio *folio)
+static __always_inline enum lru_list folio_lru_list(const struct folio *folio)
 {
 	enum lru_list lru;
 
@@ -141,7 +141,7 @@ static inline int lru_tier_from_refs(int
 	return workingset ? MAX_NR_TIERS - 1 : order_base_2(refs);
 }
 
-static inline int folio_lru_refs(struct folio *folio)
+static inline int folio_lru_refs(const struct folio *folio)
 {
 	unsigned long flags = READ_ONCE(folio->flags.f);
 
@@ -154,14 +154,14 @@ static inline int folio_lru_refs(struct
 	return ((flags & LRU_REFS_MASK) >> LRU_REFS_PGOFF) + 1;
 }
 
-static inline int folio_lru_gen(struct folio *folio)
+static inline int folio_lru_gen(const struct folio *folio)
 {
 	unsigned long flags = READ_ONCE(folio->flags.f);
 
 	return ((flags & LRU_GEN_MASK) >> LRU_GEN_PGOFF) - 1;
 }
 
-static inline bool lru_gen_is_active(struct lruvec *lruvec, int gen)
+static inline bool lru_gen_is_active(const struct lruvec *lruvec, int gen)
 {
 	unsigned long max_seq = lruvec->lrugen.max_seq;
 
@@ -217,12 +217,12 @@ static inline void lru_gen_update_size(s
 	VM_WARN_ON_ONCE(lru_gen_is_active(lruvec, old_gen) && !lru_gen_is_active(lruvec, new_gen));
 }
 
-static inline unsigned long lru_gen_folio_seq(struct lruvec *lruvec, struct folio *folio,
+static inline unsigned long lru_gen_folio_seq(const struct lruvec *lruvec, const struct folio *folio,
 					      bool reclaiming)
 {
 	int gen;
 	int type = folio_is_file_lru(folio);
-	struct lru_gen_folio *lrugen = &lruvec->lrugen;
+	const struct lru_gen_folio *lrugen = &lruvec->lrugen;
 
 	/*
 	 * +-----------------------------------+-----------------------------------+
@@ -302,7 +302,7 @@ static inline bool lru_gen_del_folio(str
 	return true;
 }
 
-static inline void folio_migrate_refs(struct folio *new, struct folio *old)
+static inline void folio_migrate_refs(struct folio *new, const struct folio *old)
 {
 	unsigned long refs = READ_ONCE(old->flags.f) & LRU_REFS_MASK;
 
@@ -330,7 +330,7 @@ static inline bool lru_gen_del_folio(str
 	return false;
 }
 
-static inline void folio_migrate_refs(struct folio *new, struct folio *old)
+static inline void folio_migrate_refs(struct folio *new, const struct folio *old)
 {
 
 }
@@ -508,7 +508,7 @@ static inline void dec_tlb_flush_pending
 	atomic_dec(&mm->tlb_flush_pending);
 }
 
-static inline bool mm_tlb_flush_pending(struct mm_struct *mm)
+static inline bool mm_tlb_flush_pending(const struct mm_struct *mm)
 {
 	/*
 	 * Must be called after having acquired the PTL; orders against that
@@ -521,7 +521,7 @@ static inline bool mm_tlb_flush_pending(
 	return atomic_read(&mm->tlb_flush_pending);
 }
 
-static inline bool mm_tlb_flush_nested(struct mm_struct *mm)
+static inline bool mm_tlb_flush_nested(const struct mm_struct *mm)
 {
 	/*
 	 * Similar to mm_tlb_flush_pending(), we must have acquired the PTL
@@ -605,7 +605,7 @@ pte_install_uffd_wp_if_needed(struct vm_
 	return false;
 }
 
-static inline bool vma_has_recency(struct vm_area_struct *vma)
+static inline bool vma_has_recency(const struct vm_area_struct *vma)
 {
 	if (vma->vm_flags & (VM_SEQ_READ | VM_RAND_READ))
 		return false;
--- a/include/linux/mm_types.h~mm-add-const-to-lots-of-pointer-parameters
+++ a/include/linux/mm_types.h
@@ -632,7 +632,7 @@ static inline void ptdesc_pmd_pts_dec(st
 	atomic_dec(&ptdesc->pt_share_count);
 }
 
-static inline int ptdesc_pmd_pts_count(struct ptdesc *ptdesc)
+static inline int ptdesc_pmd_pts_count(const struct ptdesc *ptdesc)
 {
 	return atomic_read(&ptdesc->pt_share_count);
 }
@@ -660,7 +660,7 @@ static inline void set_page_private(stru
 	page->private = private;
 }
 
-static inline void *folio_get_private(struct folio *folio)
+static inline void *folio_get_private(const struct folio *folio)
 {
 	return folio->private;
 }
--- a/include/linux/mmzone.h~mm-add-const-to-lots-of-pointer-parameters
+++ a/include/linux/mmzone.h
@@ -1103,7 +1103,7 @@ static inline unsigned long promo_wmark_
 	return wmark_pages(z, WMARK_PROMO);
 }
 
-static inline unsigned long zone_managed_pages(struct zone *zone)
+static inline unsigned long zone_managed_pages(const struct zone *zone)
 {
 	return (unsigned long)atomic_long_read(&zone->managed_pages);
 }
@@ -1127,12 +1127,12 @@ static inline bool zone_spans_pfn(const
 	return zone->zone_start_pfn <= pfn && pfn < zone_end_pfn(zone);
 }
 
-static inline bool zone_is_initialized(struct zone *zone)
+static inline bool zone_is_initialized(const struct zone *zone)
 {
 	return zone->initialized;
 }
 
-static inline bool zone_is_empty(struct zone *zone)
+static inline bool zone_is_empty(const struct zone *zone)
 {
 	return zone->spanned_pages == 0;
 }
@@ -1272,7 +1272,7 @@ static inline bool folio_is_zone_movable
  * Return true if [start_pfn, start_pfn + nr_pages) range has a non-empty
  * intersection with the given zone
  */
-static inline bool zone_intersects(struct zone *zone,
+static inline bool zone_intersects(const struct zone *zone,
 		unsigned long start_pfn, unsigned long nr_pages)
 {
 	if (zone_is_empty(zone))
@@ -1580,12 +1580,12 @@ static inline int local_memory_node(int
 #define zone_idx(zone)		((zone) - (zone)->zone_pgdat->node_zones)
 
 #ifdef CONFIG_ZONE_DEVICE
-static inline bool zone_is_zone_device(struct zone *zone)
+static inline bool zone_is_zone_device(const struct zone *zone)
 {
 	return zone_idx(zone) == ZONE_DEVICE;
 }
 #else
-static inline bool zone_is_zone_device(struct zone *zone)
+static inline bool zone_is_zone_device(const struct zone *zone)
 {
 	return false;
 }
@@ -1597,19 +1597,19 @@ static inline bool zone_is_zone_device(s
  * populated_zone(). If the whole zone is reserved then we can easily
  * end up with populated_zone() && !managed_zone().
  */
-static inline bool managed_zone(struct zone *zone)
+static inline bool managed_zone(const struct zone *zone)
 {
 	return zone_managed_pages(zone);
 }
 
 /* Returns true if a zone has memory */
-static inline bool populated_zone(struct zone *zone)
+static inline bool populated_zone(const struct zone *zone)
 {
 	return zone->present_pages;
 }
 
 #ifdef CONFIG_NUMA
-static inline int zone_to_nid(struct zone *zone)
+static inline int zone_to_nid(const struct zone *zone)
 {
 	return zone->node;
 }
@@ -1619,7 +1619,7 @@ static inline void zone_set_nid(struct z
 	zone->node = nid;
 }
 #else
-static inline int zone_to_nid(struct zone *zone)
+static inline int zone_to_nid(const struct zone *zone)
 {
 	return 0;
 }
@@ -1646,7 +1646,7 @@ static inline int is_highmem_idx(enum zo
  * @zone: pointer to struct zone variable
  * Return: 1 for a highmem zone, 0 otherwise
  */
-static inline int is_highmem(struct zone *zone)
+static inline int is_highmem(const struct zone *zone)
 {
 	return is_highmem_idx(zone_idx(zone));
 }
@@ -1712,12 +1712,12 @@ static inline struct zone *zonelist_zone
 	return zoneref->zone;
 }
 
-static inline int zonelist_zone_idx(struct zoneref *zoneref)
+static inline int zonelist_zone_idx(const struct zoneref *zoneref)
 {
 	return zoneref->zone_idx;
 }
 
-static inline int zonelist_node_idx(struct zoneref *zoneref)
+static inline int zonelist_node_idx(const struct zoneref *zoneref)
 {
 	return zone_to_nid(zoneref->zone);
 }
@@ -2020,7 +2020,7 @@ static inline struct page *__section_mem
 	return (struct page *)map;
 }
 
-static inline int present_section(struct mem_section *section)
+static inline int present_section(const struct mem_section *section)
 {
 	return (section && (section->section_mem_map & SECTION_MARKED_PRESENT));
 }
@@ -2030,12 +2030,12 @@ static inline int present_section_nr(uns
 	return present_section(__nr_to_section(nr));
 }
 
-static inline int valid_section(struct mem_section *section)
+static inline int valid_section(const struct mem_section *section)
 {
 	return (section && (section->section_mem_map & SECTION_HAS_MEM_MAP));
 }
 
-static inline int early_section(struct mem_section *section)
+static inline int early_section(const struct mem_section *section)
 {
 	return (section && (section->section_mem_map & SECTION_IS_EARLY));
 }
@@ -2045,27 +2045,27 @@ static inline int valid_section_nr(unsig
 	return valid_section(__nr_to_section(nr));
 }
 
-static inline int online_section(struct mem_section *section)
+static inline int online_section(const struct mem_section *section)
 {
 	return (section && (section->section_mem_map & SECTION_IS_ONLINE));
 }
 
 #ifdef CONFIG_ZONE_DEVICE
-static inline int online_device_section(struct mem_section *section)
+static inline int online_device_section(const struct mem_section *section)
 {
 	unsigned long flags = SECTION_IS_ONLINE | SECTION_TAINT_ZONE_DEVICE;
 
 	return section && ((section->section_mem_map & flags) == flags);
 }
 #else
-static inline int online_device_section(struct mem_section *section)
+static inline int online_device_section(const struct mem_section *section)
 {
 	return 0;
 }
 #endif
 
 #ifdef CONFIG_SPARSEMEM_VMEMMAP_PREINIT
-static inline int preinited_vmemmap_section(struct mem_section *section)
+static inline int preinited_vmemmap_section(const struct mem_section *section)
 {
 	return (section &&
 		(section->section_mem_map & SECTION_IS_VMEMMAP_PREINIT));
@@ -2075,7 +2075,7 @@ void sparse_vmemmap_init_nid_early(int n
 void sparse_vmemmap_init_nid_late(int nid);
 
 #else
-static inline int preinited_vmemmap_section(struct mem_section *section)
+static inline int preinited_vmemmap_section(const struct mem_section *section)
 {
 	return 0;
 }
--- a/include/linux/pagemap.h~mm-add-const-to-lots-of-pointer-parameters
+++ a/include/linux/pagemap.h
@@ -140,7 +140,7 @@ static inline int inode_drain_writes(str
 	return filemap_write_and_wait(inode->i_mapping);
 }
 
-static inline bool mapping_empty(struct address_space *mapping)
+static inline bool mapping_empty(const struct address_space *mapping)
 {
 	return xa_empty(&mapping->i_pages);
 }
@@ -166,7 +166,7 @@ static inline bool mapping_empty(struct
  * refcount and the referenced bit, which will be elevated or set in
  * the process of adding new cache pages to an inode.
  */
-static inline bool mapping_shrinkable(struct address_space *mapping)
+static inline bool mapping_shrinkable(const struct address_space *mapping)
 {
 	void *head;
 
@@ -265,7 +265,7 @@ static inline void mapping_clear_unevict
 	clear_bit(AS_UNEVICTABLE, &mapping->flags);
 }
 
-static inline bool mapping_unevictable(struct address_space *mapping)
+static inline bool mapping_unevictable(const struct address_space *mapping)
 {
 	return mapping && test_bit(AS_UNEVICTABLE, &mapping->flags);
 }
@@ -275,7 +275,7 @@ static inline void mapping_set_exiting(s
 	set_bit(AS_EXITING, &mapping->flags);
 }
 
-static inline int mapping_exiting(struct address_space *mapping)
+static inline int mapping_exiting(const struct address_space *mapping)
 {
 	return test_bit(AS_EXITING, &mapping->flags);
 }
@@ -285,7 +285,7 @@ static inline void mapping_set_no_writeb
 	set_bit(AS_NO_WRITEBACK_TAGS, &mapping->flags);
 }
 
-static inline int mapping_use_writeback_tags(struct address_space *mapping)
+static inline int mapping_use_writeback_tags(const struct address_space *mapping)
 {
 	return !test_bit(AS_NO_WRITEBACK_TAGS, &mapping->flags);
 }
@@ -331,7 +331,7 @@ static inline void mapping_set_inaccessi
 	set_bit(AS_INACCESSIBLE, &mapping->flags);
 }
 
-static inline bool mapping_inaccessible(struct address_space *mapping)
+static inline bool mapping_inaccessible(const struct address_space *mapping)
 {
 	return test_bit(AS_INACCESSIBLE, &mapping->flags);
 }
@@ -341,18 +341,18 @@ static inline void mapping_set_writeback
 	set_bit(AS_WRITEBACK_MAY_DEADLOCK_ON_RECLAIM, &mapping->flags);
 }
 
-static inline bool mapping_writeback_may_deadlock_on_reclaim(struct address_space *mapping)
+static inline bool mapping_writeback_may_deadlock_on_reclaim(const struct address_space *mapping)
 {
 	return test_bit(AS_WRITEBACK_MAY_DEADLOCK_ON_RECLAIM, &mapping->flags);
 }
 
-static inline gfp_t mapping_gfp_mask(struct address_space * mapping)
+static inline gfp_t mapping_gfp_mask(const struct address_space * mapping)
 {
 	return mapping->gfp_mask;
 }
 
 /* Restricts the given gfp_mask to what the mapping allows. */
-static inline gfp_t mapping_gfp_constraint(struct address_space *mapping,
+static inline gfp_t mapping_gfp_constraint(const struct address_space *mapping,
 		gfp_t gfp_mask)
 {
 	return mapping_gfp_mask(mapping) & gfp_mask;
@@ -475,7 +475,7 @@ mapping_min_folio_order(const struct add
 }
 
 static inline unsigned long
-mapping_min_folio_nrpages(struct address_space *mapping)
+mapping_min_folio_nrpages(const struct address_space *mapping)
 {
 	return 1UL << mapping_min_folio_order(mapping);
 }
@@ -495,7 +495,7 @@ mapping_min_folio_nrbytes(struct address
  * new folio to the page cache and need to know what index to give it,
  * call this function.
  */
-static inline pgoff_t mapping_align_index(struct address_space *mapping,
+static inline pgoff_t mapping_align_index(const struct address_space *mapping,
 					  pgoff_t index)
 {
 	return round_down(index, mapping_min_folio_nrpages(mapping));
@@ -505,7 +505,7 @@ static inline pgoff_t mapping_align_inde
  * Large folio support currently depends on THP.  These dependencies are
  * being worked on but are not yet fixed.
  */
-static inline bool mapping_large_folio_support(struct address_space *mapping)
+static inline bool mapping_large_folio_support(const struct address_space *mapping)
 {
 	/* AS_FOLIO_ORDER is only reasonable for pagecache folios */
 	VM_WARN_ONCE((unsigned long)mapping & FOLIO_MAPPING_ANON,
@@ -520,7 +520,7 @@ static inline size_t mapping_max_folio_s
 	return PAGE_SIZE << mapping_max_folio_order(mapping);
 }
 
-static inline int filemap_nr_thps(struct address_space *mapping)
+static inline int filemap_nr_thps(const struct address_space *mapping)
 {
 #ifdef CONFIG_READ_ONLY_THP_FOR_FS
 	return atomic_read(&mapping->nr_thps);
@@ -934,7 +934,7 @@ static inline struct page *grab_cache_pa
  *
  * Return: The index of the folio which follows this folio in the file.
  */
-static inline pgoff_t folio_next_index(struct folio *folio)
+static inline pgoff_t folio_next_index(const struct folio *folio)
 {
 	return folio->index + folio_nr_pages(folio);
 }
@@ -963,7 +963,7 @@ static inline struct page *folio_file_pa
  * e.g., shmem did not move this folio to the swap cache.
  * Return: true or false.
  */
-static inline bool folio_contains(struct folio *folio, pgoff_t index)
+static inline bool folio_contains(const struct folio *folio, pgoff_t index)
 {
 	VM_WARN_ON_ONCE_FOLIO(folio_test_swapcache(folio), folio);
 	return index - folio->index < folio_nr_pages(folio);
@@ -1040,12 +1040,12 @@ static inline loff_t page_offset(struct
 /*
  * Get the offset in PAGE_SIZE (even for hugetlb folios).
  */
-static inline pgoff_t folio_pgoff(struct folio *folio)
+static inline pgoff_t folio_pgoff(const struct folio *folio)
 {
 	return folio->index;
 }
 
-static inline pgoff_t linear_page_index(struct vm_area_struct *vma,
+static inline pgoff_t linear_page_index(const struct vm_area_struct *vma,
 					unsigned long address)
 {
 	pgoff_t pgoff;
@@ -1466,7 +1466,7 @@ static inline unsigned int __readahead_b
  * readahead_pos - The byte offset into the file of this readahead request.
  * @rac: The readahead request.
  */
-static inline loff_t readahead_pos(struct readahead_control *rac)
+static inline loff_t readahead_pos(const struct readahead_control *rac)
 {
 	return (loff_t)rac->_index * PAGE_SIZE;
 }
@@ -1475,7 +1475,7 @@ static inline loff_t readahead_pos(struc
  * readahead_length - The number of bytes in this readahead request.
  * @rac: The readahead request.
  */
-static inline size_t readahead_length(struct readahead_control *rac)
+static inline size_t readahead_length(const struct readahead_control *rac)
 {
 	return rac->_nr_pages * PAGE_SIZE;
 }
@@ -1484,7 +1484,7 @@ static inline size_t readahead_length(st
  * readahead_index - The index of the first page in this readahead request.
  * @rac: The readahead request.
  */
-static inline pgoff_t readahead_index(struct readahead_control *rac)
+static inline pgoff_t readahead_index(const struct readahead_control *rac)
 {
 	return rac->_index;
 }
@@ -1493,7 +1493,7 @@ static inline pgoff_t readahead_index(st
  * readahead_count - The number of pages in this readahead request.
  * @rac: The readahead request.
  */
-static inline unsigned int readahead_count(struct readahead_control *rac)
+static inline unsigned int readahead_count(const struct readahead_control *rac)
 {
 	return rac->_nr_pages;
 }
@@ -1502,12 +1502,12 @@ static inline unsigned int readahead_cou
  * readahead_batch_length - The number of bytes in the current batch.
  * @rac: The readahead request.
  */
-static inline size_t readahead_batch_length(struct readahead_control *rac)
+static inline size_t readahead_batch_length(const struct readahead_control *rac)
 {
 	return rac->_batch_count * PAGE_SIZE;
 }
 
-static inline unsigned long dir_pages(struct inode *inode)
+static inline unsigned long dir_pages(const struct inode *inode)
 {
 	return (unsigned long)(inode->i_size + PAGE_SIZE - 1) >>
 			       PAGE_SHIFT;
@@ -1521,8 +1521,8 @@ static inline unsigned long dir_pages(st
  * Return: the number of bytes in the folio up to EOF,
  * or -EFAULT if the folio was truncated.
  */
-static inline ssize_t folio_mkwrite_check_truncate(struct folio *folio,
-					      struct inode *inode)
+static inline ssize_t folio_mkwrite_check_truncate(const struct folio *folio,
+					      const struct inode *inode)
 {
 	loff_t size = i_size_read(inode);
 	pgoff_t index = size >> PAGE_SHIFT;
@@ -1553,7 +1553,7 @@ static inline ssize_t folio_mkwrite_chec
  * Return: The number of filesystem blocks covered by this folio.
  */
 static inline
-unsigned int i_blocks_per_folio(struct inode *inode, struct folio *folio)
+unsigned int i_blocks_per_folio(const struct inode *inode, const struct folio *folio)
 {
 	return folio_size(folio) >> inode->i_blkbits;
 }
--- a/include/linux/pagevec.h~mm-add-const-to-lots-of-pointer-parameters
+++ a/include/linux/pagevec.h
@@ -51,12 +51,12 @@ static inline void folio_batch_reinit(st
 	fbatch->i = 0;
 }
 
-static inline unsigned int folio_batch_count(struct folio_batch *fbatch)
+static inline unsigned int folio_batch_count(const struct folio_batch *fbatch)
 {
 	return fbatch->nr;
 }
 
-static inline unsigned int folio_batch_space(struct folio_batch *fbatch)
+static inline unsigned int folio_batch_space(const struct folio_batch *fbatch)
 {
 	return PAGEVEC_SIZE - fbatch->nr;
 }
--- a/include/linux/shmem_fs.h~mm-add-const-to-lots-of-pointer-parameters
+++ a/include/linux/shmem_fs.h
@@ -99,9 +99,9 @@ extern unsigned long shmem_get_unmapped_
 		unsigned long len, unsigned long pgoff, unsigned long flags);
 extern int shmem_lock(struct file *file, int lock, struct ucounts *ucounts);
 #ifdef CONFIG_SHMEM
-bool shmem_mapping(struct address_space *mapping);
+bool shmem_mapping(const struct address_space *mapping);
 #else
-static inline bool shmem_mapping(struct address_space *mapping)
+static inline bool shmem_mapping(const struct address_space *mapping)
 {
 	return false;
 }
--- a/mm/oom_kill.c~mm-add-const-to-lots-of-pointer-parameters
+++ a/mm/oom_kill.c
@@ -490,7 +490,7 @@ static bool oom_killer_disabled __read_m
  * task's threads: if one of those is using this mm then this task was also
  * using it.
  */
-bool process_shares_mm(struct task_struct *p, struct mm_struct *mm)
+bool process_shares_mm(struct task_struct *p, const struct mm_struct *mm)
 {
 	struct task_struct *t;
 
--- a/mm/shmem.c~mm-add-const-to-lots-of-pointer-parameters
+++ a/mm/shmem.c
@@ -275,18 +275,18 @@ static const struct vm_operations_struct
 static const struct vm_operations_struct shmem_anon_vm_ops;
 static struct file_system_type shmem_fs_type;
 
-bool shmem_mapping(struct address_space *mapping)
+bool shmem_mapping(const struct address_space *mapping)
 {
 	return mapping->a_ops == &shmem_aops;
 }
 EXPORT_SYMBOL_GPL(shmem_mapping);
 
-bool vma_is_anon_shmem(struct vm_area_struct *vma)
+bool vma_is_anon_shmem(const struct vm_area_struct *vma)
 {
 	return vma->vm_ops == &shmem_anon_vm_ops;
 }
 
-bool vma_is_shmem(struct vm_area_struct *vma)
+bool vma_is_shmem(const struct vm_area_struct *vma)
 {
 	return vma_is_anon_shmem(vma) || vma->vm_ops == &shmem_vm_ops;
 }
--- a/mm/util.c~mm-add-const-to-lots-of-pointer-parameters
+++ a/mm/util.c
@@ -315,7 +315,7 @@ void *memdup_user_nul(const void __user
 EXPORT_SYMBOL(memdup_user_nul);
 
 /* Check if the vma is being used as a stack by this task */
-int vma_is_stack_for_current(struct vm_area_struct *vma)
+int vma_is_stack_for_current(const struct vm_area_struct *vma)
 {
 	struct task_struct * __maybe_unused t = current;
 
_