[RFC PATCH 11/39] mm: hugetlb: Expose hugetlb_acct_memory()

Ackerley Tng
2024-09-10T23:44:51Z

This will used by guest_memfd in a later patch.

Signed-off-by: Ackerley Tng <ackerleytng@google.com>
---
include/linux/hugetlb.h | 2 ++
mm/hugetlb.c | 4 ++--
2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h
index 9ef1adbd3207..4d47bf94c211 100644
--- a/include/linux/hugetlb.h
+++ b/include/linux/hugetlb.h
@@ -122,6 +122,8 @@ void hugepage_put_subpool(struct hugepage_subpool *spool);
long hugepage_subpool_get_pages(struct hugepage_subpool *spool, long delta);
long hugepage_subpool_put_pages(struct hugepage_subpool *spool, long delta);

+int hugetlb_acct_memory(struct hstate *h, long delta);
+
void hugetlb_dup_vma_private(struct vm_area_struct *vma);
void clear_vma_resv_huge_pages(struct vm_area_struct *vma);
int move_hugetlb_page_tables(struct vm_area_struct *vma,
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index efdb5772b367..5a37b03e1361 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -93,7 +93,7 @@ struct mutex *hugetlb_fault_mutex_table ____cacheline_aligned_in_smp;

/* Forward declaration */
static int __hugetlb_acct_memory(struct hstate *h, long delta, bool use_surplus);
-static int hugetlb_acct_memory(struct hstate *h, long delta);
+int hugetlb_acct_memory(struct hstate *h, long delta);
static void hugetlb_vma_lock_free(struct vm_area_struct *vma);
static void hugetlb_vma_lock_alloc(struct vm_area_struct *vma);
static void __hugetlb_vma_unlock_write_free(struct vm_area_struct *vma);
@@ -5170,7 +5170,7 @@ static int __hugetlb_acct_memory(struct hstate *h, long delta, bool use_surplus)
return ret;
}

-static int hugetlb_acct_memory(struct hstate *h, long delta)
+int hugetlb_acct_memory(struct hstate *h, long delta)
{
return __hugetlb_acct_memory(h, delta, true);
}
--
2.46.0.598.g6f2099f65c-goog