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>
---
include/linux/hugetlb.h | 1 +
mm/memory.c | 2 +-
2 files changed, 2 insertions(+), 1 deletion(-)
diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h
index c1ee640d87b1..9b45edb6e303 100644
--- a/include/linux/hugetlb.h
+++ b/include/linux/hugetlb.h
@@ -272,6 +272,7 @@ void hugetlb_vma_unlock_write(struct vm_area_struct *vma);
int hugetlb_vma_trylock_write(struct vm_area_struct *vma);
void hugetlb_vma_assert_locked(struct vm_area_struct *vma);
void hugetlb_vma_lock_release(struct kref *kref);
+vm_fault_t vmf_anon_prepare(struct vm_fault *vmf);
int pmd_huge(pmd_t pmd);
int pud_huge(pud_t pud);
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
