[PATCH v4 02/12] khugepaged: rename hpage_collapse_* to khugepaged_*

Nico Pache
2025-04-17T00:06:25Z

functions in khugepaged.c use a mix of hpage_collapse and khugepaged
as the function prefix.

rename all of them to khugepaged to keep things consistent and slightly
shorten the function names.

Signed-off-by: Nico Pache <npache@redhat.com>
---
mm/khugepaged.c | 50 ++++++++++++++++++++++++-------------------------
1 file changed, 25 insertions(+), 25 deletions(-)

diff --git a/mm/khugepaged.c b/mm/khugepaged.c
index cecadc4239e7..b6281c04f1e5 100644
--- a/mm/khugepaged.c
+++ b/mm/khugepaged.c
@@ -402,14 +402,14 @@ void __init khugepaged_destroy(void)
kmem_cache_destroy(mm_slot_cache);
}

-static inline int hpage_collapse_test_exit(struct mm_struct *mm)
+static inline int khugepaged_test_exit(struct mm_struct *mm)
{
return atomic_read(&mm->mm_users) == 0;
}

-static inline int hpage_collapse_test_exit_or_disable(struct mm_struct *mm)
+static inline int khugepaged_test_exit_or_disable(struct mm_struct *mm)
{
- return hpage_collapse_test_exit(mm) ||
+ return khugepaged_test_exit(mm) ||
test_bit(MMF_DISABLE_THP, &mm->flags);
}

@@ -444,7 +444,7 @@ void __khugepaged_enter(struct mm_struct *mm)
int wakeup;

/* __khugepaged_exit() must not run from under us */
- VM_BUG_ON_MM(hpage_collapse_test_exit(mm), mm);
+ VM_BUG_ON_MM(khugepaged_test_exit(mm), mm);
if (unlikely(test_and_set_bit(MMF_VM_HUGEPAGE, &mm->flags)))
return;

@@ -503,7 +503,7 @@ void __khugepaged_exit(struct mm_struct *mm)
} else if (mm_slot) {
/*
* This is required to serialize against
- * hpage_collapse_test_exit() (which is guaranteed to run
+ * khugepaged_test_exit() (which is guaranteed to run
* under mmap sem read mode). Stop here (after we return all
* pagetables will be destroyed) until khugepaged has finished
* working on the pagetables under the mmap_lock.
@@ -851,7 +851,7 @@ struct collapse_control khugepaged_collapse_control = {
.is_khugepaged = true,
};

-static bool hpage_collapse_scan_abort(int nid, struct collapse_control *cc)
+static bool khugepaged_scan_abort(int nid, struct collapse_control *cc)
{
int i;

@@ -886,7 +886,7 @@ static inline gfp_t alloc_hugepage_khugepaged_gfpmask(void)
}

#ifdef CONFIG_NUMA
-static int hpage_collapse_find_target_node(struct collapse_control *cc)
+static int khugepaged_find_target_node(struct collapse_control *cc)
{
int nid, target_node = 0, max_value = 0;

@@ -905,7 +905,7 @@ static int hpage_collapse_find_target_node(struct collapse_control *cc)
return target_node;
}
#else
-static int hpage_collapse_find_target_node(struct collapse_control *cc)
+static int khugepaged_find_target_node(struct collapse_control *cc)
{
return 0;
}
@@ -925,7 +925,7 @@ static int hugepage_vma_revalidate(struct mm_struct *mm, unsigned long address,
struct vm_area_struct *vma;
unsigned long tva_flags = cc->is_khugepaged ? TVA_ENFORCE_SYSFS : 0;

- if (unlikely(hpage_collapse_test_exit_or_disable(mm)))
+ if (unlikely(khugepaged_test_exit_or_disable(mm)))
return SCAN_ANY_PROCESS;

*vmap = vma = find_vma(mm, address);
@@ -992,7 +992,7 @@ static int check_pmd_still_valid(struct mm_struct *mm,

/*
* Bring missing pages in from swap, to complete THP collapse.
- * Only done if hpage_collapse_scan_pmd believes it is worthwhile.
+ * Only done if khugepaged_scan_pmd believes it is worthwhile.
*
* Called and returns without pte mapped or spinlocks held.
* Returns result: if not SCAN_SUCCEED, mmap_lock has been released.
@@ -1078,7 +1078,7 @@ static int alloc_charge_folio(struct folio **foliop, struct mm_struct *mm,
{
gfp_t gfp = (cc->is_khugepaged ? alloc_hugepage_khugepaged_gfpmask() :
GFP_TRANSHUGE);
- int node = hpage_collapse_find_target_node(cc);
+ int node = khugepaged_find_target_node(cc);
struct folio *folio;

folio = __folio_alloc(gfp, HPAGE_PMD_ORDER, node, &cc->alloc_nmask);
@@ -1264,7 +1264,7 @@ static int collapse_huge_page(struct mm_struct *mm, unsigned long address,
return result;
}

-static int hpage_collapse_scan_pmd(struct mm_struct *mm,
+static int khugepaged_scan_pmd(struct mm_struct *mm,
struct vm_area_struct *vma,
unsigned long address, bool *mmap_locked,
struct collapse_control *cc)
@@ -1378,7 +1378,7 @@ static int hpage_collapse_scan_pmd(struct mm_struct *mm,
* hit record.
*/
node = folio_nid(folio);
- if (hpage_collapse_scan_abort(node, cc)) {
+ if (khugepaged_scan_abort(node, cc)) {
result = SCAN_SCAN_ABORT;
goto out_unmap;
}
@@ -1447,7 +1447,7 @@ static void collect_mm_slot(struct khugepaged_mm_slot *mm_slot)

lockdep_assert_held(&khugepaged_mm_lock);

- if (hpage_collapse_test_exit(mm)) {
+ if (khugepaged_test_exit(mm)) {
/* free mm_slot */
hash_del(&slot->hash);
list_del(&slot->mm_node);
@@ -1742,7 +1742,7 @@ static void retract_page_tables(struct address_space *mapping, pgoff_t pgoff)
if (find_pmd_or_thp_or_none(mm, addr, &pmd) != SCAN_SUCCEED)
continue;

- if (hpage_collapse_test_exit(mm))
+ if (khugepaged_test_exit(mm))
continue;
/*
* When a vma is registered with uffd-wp, we cannot recycle
@@ -2264,7 +2264,7 @@ static int collapse_file(struct mm_struct *mm, unsigned long addr,
return result;
}

-static int hpage_collapse_scan_file(struct mm_struct *mm, unsigned long addr,
+static int khugepaged_scan_file(struct mm_struct *mm, unsigned long addr,
struct file *file, pgoff_t start,
struct collapse_control *cc)
{
@@ -2309,7 +2309,7 @@ static int hpage_collapse_scan_file(struct mm_struct *mm, unsigned long addr,
}

node = folio_nid(folio);
- if (hpage_collapse_scan_abort(node, cc)) {
+ if (khugepaged_scan_abort(node, cc)) {
result = SCAN_SCAN_ABORT;
break;
}
@@ -2355,7 +2355,7 @@ static int hpage_collapse_scan_file(struct mm_struct *mm, unsigned long addr,
return result;
}
#else
-static int hpage_collapse_scan_file(struct mm_struct *mm, unsigned long addr,
+static int khugepaged_scan_file(struct mm_struct *mm, unsigned long addr,
struct file *file, pgoff_t start,
struct collapse_control *cc)
{
@@ -2383,19 +2383,19 @@ static int khugepaged_collapse_single_pmd(unsigned long addr,

mmap_read_unlock(mm);
*mmap_locked = false;
- result = hpage_collapse_scan_file(mm, addr, file, pgoff,
+ result = khugepaged_scan_file(mm, addr, file, pgoff,
cc);
fput(file);
if (result == SCAN_PTE_MAPPED_HUGEPAGE) {
mmap_read_lock(mm);
- if (hpage_collapse_test_exit_or_disable(mm))
+ if (khugepaged_test_exit_or_disable(mm))
goto end;
result = collapse_pte_mapped_thp(mm, addr,
!cc->is_khugepaged);
mmap_read_unlock(mm);
}
} else {
- result = hpage_collapse_scan_pmd(mm, vma, addr,
+ result = khugepaged_scan_pmd(mm, vma, addr,
mmap_locked, cc);
}
if (cc->is_khugepaged && result == SCAN_SUCCEED)
@@ -2443,7 +2443,7 @@ static unsigned int khugepaged_scan_mm_slot(unsigned int pages, int *result,
goto breakouterloop_mmap_lock;

progress++;
- if (unlikely(hpage_collapse_test_exit_or_disable(mm)))
+ if (unlikely(khugepaged_test_exit_or_disable(mm)))
goto breakouterloop;

vma_iter_init(&vmi, mm, khugepaged_scan.address);
@@ -2451,7 +2451,7 @@ static unsigned int khugepaged_scan_mm_slot(unsigned int pages, int *result,
unsigned long hstart, hend;

cond_resched();
- if (unlikely(hpage_collapse_test_exit_or_disable(mm))) {
+ if (unlikely(khugepaged_test_exit_or_disable(mm))) {
progress++;
break;
}
@@ -2473,7 +2473,7 @@ static unsigned int khugepaged_scan_mm_slot(unsigned int pages, int *result,
bool mmap_locked = true;

cond_resched();
- if (unlikely(hpage_collapse_test_exit_or_disable(mm)))
+ if (unlikely(khugepaged_test_exit_or_disable(mm)))
goto breakouterloop;

VM_BUG_ON(khugepaged_scan.address < hstart ||
@@ -2509,7 +2509,7 @@ static unsigned int khugepaged_scan_mm_slot(unsigned int pages, int *result,
* Release the current mm_slot if this mm is about to die, or
* if we scanned all vmas of this mm.
*/
- if (hpage_collapse_test_exit(mm) || !vma) {
+ if (khugepaged_test_exit(mm) || !vma) {
/*
* Make sure that if mm_users is reaching zero while
* khugepaged runs here, khugepaged_exit will find
--
2.48.1