In order to handle hugetlb faults under the VMA lock, hugetlb can use
vmf_anon_prepare() to ensure we can safely prepare an anon_vma. Change
it to be a non-static function so it can be used within hugetlb as well.
Signed-off-by: Vishal Moola (Oracle) <vishal.moola@xxxxxxxxx>
---
mm/internal.h | 1 +
mm/memory.c | 2 +-
2 files changed, 2 insertions(+), 1 deletion(-)
diff --git a/mm/internal.h b/mm/internal.h
index f309a010d50f..b9b6b2bc1663 100644
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -103,6 +103,7 @@ static inline void wake_throttle_isolated(pg_data_t *pgdat)
wake_up(wqh);
}
+vm_fault_t vmf_anon_prepare(struct vm_fault *vmf);
vm_fault_t do_swap_page(struct vm_fault *vmf);
void folio_rotate_reclaimable(struct folio *folio);
bool __folio_end_writeback(struct folio *folio);
diff --git a/mm/memory.c b/mm/memory.c
index 89bcae0b224d..c93b058adfb2 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -3081,7 +3081,7 @@ static inline vm_fault_t vmf_can_call_fault(const struct vm_fault *vmf)
return VM_FAULT_RETRY;
}
-static vm_fault_t vmf_anon_prepare(struct vm_fault *vmf)
+vm_fault_t vmf_anon_prepare(struct vm_fault *vmf)
{
struct vm_area_struct *vma = vmf->vma;
--
2.43.0
