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mm: constify assert/test functions in mm.h 

For improved const-correctness.

We select certain assert and test functions which either invoke each
other, functions that are already const-ified, or no further functions.

It is therefore relatively trivial to const-ify them, which provides a
basis for further const-ification further up the call stack.

Link: https://lkml.kernel.org/r/20250901205021.3573313-12-max.kellermann@ionos.com
Signed-off-by: Max Kellermann <max.kellermann@ionos.com>
Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Acked-by: David Hildenbrand <david@redhat.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Acked-by: Shakeel Butt <shakeel.butt@linux.dev>
Cc: Alexander Gordeev <agordeev@linux.ibm.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Andreas Larsson <andreas@gaisler.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Axel Rasmussen <axelrasmussen@google.com>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Borislav Betkov <bp@alien8.de>
Cc: Christian Borntraeger <borntraeger@linux.ibm.com>
Cc: Christian Brauner <brauner@kernel.org>
Cc: Christian Zankel <chris@zankel.net>
Cc: David Rientjes <rientjes@google.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Gerald Schaefer <gerald.schaefer@linux.ibm.com>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Helge Deller <deller@gmx.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Bottomley <james.bottomley@HansenPartnership.com>
Cc: Jan Kara <jack@suse.cz>
Cc: Jocelyn Falempe <jfalempe@redhat.com>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Mark Brown <broonie@kernel.org>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Michal Hocko <mhocko@suse.com>
Cc: "Nysal Jan K.A" <nysal@linux.ibm.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Russel King <linux@armlinux.org.uk>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Sven Schnelle <svens@linux.ibm.com>
Cc: Thomas Gleinxer <tglx@linutronix.de>
Cc: Thomas Huth <thuth@redhat.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Vishal Moola (Oracle) <vishal.moola@gmail.com>
Cc: Wei Xu <weixugc@google.com>
Cc: Yuanchu Xie <yuanchu@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Max Kellermann 2025-09-01 22:50:20 +02:00 committed by Andrew Morton
parent f346a9473a
commit da0045587d
1 changed files with 20 additions and 20 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

40
include/linux/mm.h
View File

@ -719,7 +719,7 @@ static inline void release_fault_lock(struct vm_fault *vmf)
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)
{
if (vmf->flags & FAULT_FLAG_VMA_LOCK)
vma_assert_locked(vmf->vma);
@ -732,7 +732,7 @@ static inline void release_fault_lock(struct vm_fault *vmf)
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);
}
@ -875,7 +875,7 @@ static inline bool vma_is_initial_stack(const struct vm_area_struct *vma)
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);
@ -889,7 +889,7 @@ static inline bool vma_is_temporary_stack(struct vm_area_struct *vma)
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;
@ -900,7 +900,7 @@ static inline bool vma_is_foreign(struct vm_area_struct *vma)
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;
}
@ -911,7 +911,7 @@ static inline bool is_shared_maywrite(vm_flags_t vm_flags)
(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);
}
@ -1855,7 +1855,7 @@ static inline struct folio *pfn_folio(unsigned long pfn)
}
#ifdef CONFIG_MMU
static inline pte_t mk_pte(struct page *page, pgprot_t pgprot)
static inline pte_t mk_pte(const struct page *page, pgprot_t pgprot)
{
return pfn_pte(page_to_pfn(page), pgprot);
}
@ -1870,7 +1870,7 @@ static inline pte_t mk_pte(struct page *page, pgprot_t pgprot)
*
* Return: A page table entry suitable for mapping this folio.
*/
static inline pte_t folio_mk_pte(struct folio *folio, pgprot_t pgprot)
static inline pte_t folio_mk_pte(const struct folio *folio, pgprot_t pgprot)
{
return pfn_pte(folio_pfn(folio), pgprot);
}
@ -1886,7 +1886,7 @@ static inline pte_t folio_mk_pte(struct folio *folio, pgprot_t pgprot)
*
* Return: A page table entry suitable for mapping this folio.
*/
static inline pmd_t folio_mk_pmd(struct folio *folio, pgprot_t pgprot)
static inline pmd_t folio_mk_pmd(const struct folio *folio, pgprot_t pgprot)
{
return pmd_mkhuge(pfn_pmd(folio_pfn(folio), pgprot));
}
@ -1902,7 +1902,7 @@ static inline pmd_t folio_mk_pmd(struct folio *folio, pgprot_t pgprot)
*
* Return: A page table entry suitable for mapping this folio.
*/
static inline pud_t folio_mk_pud(struct folio *folio, pgprot_t pgprot)
static inline pud_t folio_mk_pud(const struct folio *folio, pgprot_t pgprot)
{
return pud_mkhuge(pfn_pud(folio_pfn(folio), pgprot));
}
@ -3520,7 +3520,7 @@ struct vm_area_struct *vma_lookup(struct mm_struct *mm, unsigned long addr)
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;
@ -3532,7 +3532,7 @@ static inline unsigned long stack_guard_start_gap(struct vm_area_struct *vma)
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;
@ -3543,7 +3543,7 @@ static inline unsigned long vm_start_gap(struct vm_area_struct *vma)
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;
@ -3555,7 +3555,7 @@ static inline unsigned long vm_end_gap(struct vm_area_struct *vma)
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;
}
@ -3572,7 +3572,7 @@ static inline struct vm_area_struct *find_exact_vma(struct mm_struct *mm,
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);
@ -3688,7 +3688,7 @@ static inline int vm_fault_to_errno(vm_fault_t vm_fault, int foll_flags)
* 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)
{
/*
@ -3818,7 +3818,7 @@ static inline bool debug_guardpage_enabled(void)
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;
@ -3849,7 +3849,7 @@ static inline void debug_pagealloc_map_pages(struct page *page, int numpages) {}
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,
@ -3931,7 +3931,7 @@ void vmemmap_free(unsigned long start, unsigned long end,
#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)
@ -3945,7 +3945,7 @@ static inline void vmem_altmap_free(struct vmem_altmap *altmap,
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;
}