1 files changed, 4 insertions, 51 deletions

diff --git a/mm/mseal.c b/mm/mseal.c
index c8787cc6ba55..ece977bd21e1 100644
--- a/mm/mseal.c
+++ b/mm/mseal.c
@@ -16,28 +16,11 @@
 #include <linux/sched.h>
 #include "internal.h"
 
-static inline bool vma_is_sealed(struct vm_area_struct *vma)
-{
-	return (vma->vm_flags & VM_SEALED);
-}
-
 static inline void set_vma_sealed(struct vm_area_struct *vma)
 {
 	vm_flags_set(vma, VM_SEALED);
 }
 
-/*
- * check if a vma is sealed for modification.
- * return true, if modification is allowed.
- */
-static bool can_modify_vma(struct vm_area_struct *vma)
-{
-	if (unlikely(vma_is_sealed(vma)))
-		return false;
-
-	return true;
-}
-
 static bool is_madv_discard(int behavior)
 {
 	switch (behavior) {
@@ -71,45 +54,15 @@ static bool is_ro_anon(struct vm_area_struct *vma)
 }
 
 /*
- * Check if the vmas of a memory range are allowed to be modified.
- * the memory ranger can have a gap (unallocated memory).
- * return true, if it is allowed.
- */
-bool can_modify_mm(struct mm_struct *mm, unsigned long start, unsigned long end)
-{
-	struct vm_area_struct *vma;
-
-	VMA_ITERATOR(vmi, mm, start);
-
-	/* going through each vma to check. */
-	for_each_vma_range(vmi, vma, end) {
-		if (unlikely(!can_modify_vma(vma)))
-			return false;
-	}
-
-	/* Allow by default. */
-	return true;
-}
-
-/*
- * Check if the vmas of a memory range are allowed to be modified by madvise.
- * the memory ranger can have a gap (unallocated memory).
- * return true, if it is allowed.
+ * Check if a vma is allowed to be modified by madvise.
  */
-bool can_modify_mm_madv(struct mm_struct *mm, unsigned long start, unsigned long end,
-		int behavior)
+bool can_modify_vma_madv(struct vm_area_struct *vma, int behavior)
 {
-	struct vm_area_struct *vma;
-
-	VMA_ITERATOR(vmi, mm, start);
-
 	if (!is_madv_discard(behavior))
 		return true;
 
-	/* going through each vma to check. */
-	for_each_vma_range(vmi, vma, end)
-		if (unlikely(is_ro_anon(vma) && !can_modify_vma(vma)))
-			return false;
+	if (unlikely(!can_modify_vma(vma) && is_ro_anon(vma)))
+		return false;
 
 	/* Allow by default. */
 	return true;