mm: kill mm_wr_locked from unmap_vmas() and unmap_single_vma()

Kill mm_wr_locked since commit f8e97613fe ("mm: convert VM_PFNMAP
tracking to pfnmap_track() + pfnmap_untrack()") remove the user.

Link: https://lkml.kernel.org/r/20251104085709.2688433-1-wangkefeng.wang@huawei.com
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Acked-by: David Hildenbrand (Red Hat) <david@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

include/linux/mm.h

@@ -2480,7 +2480,7 @@ static inline void zap_vma_pages(struct vm_area_struct *vma)
 }
 void unmap_vmas(struct mmu_gather *tlb, struct ma_state *mas,
 		struct vm_area_struct *start_vma, unsigned long start,
-		unsigned long end, unsigned long tree_end, bool mm_wr_locked);
+		unsigned long end, unsigned long tree_end);
 
 struct mmu_notifier_range;
 

mm/memory.c

@@ -2023,8 +2023,7 @@ void unmap_page_range(struct mmu_gather *tlb,
 
 static void unmap_single_vma(struct mmu_gather *tlb,
 		struct vm_area_struct *vma, unsigned long start_addr,
-		unsigned long end_addr,
+		unsigned long end_addr, struct zap_details *details)
-		struct zap_details *details, bool mm_wr_locked)
 {
 	unsigned long start = max(vma->vm_start, start_addr);
 	unsigned long end;
@@ -2070,7 +2069,6 @@ static void unmap_single_vma(struct mmu_gather *tlb,
  * @start_addr: virtual address at which to start unmapping
  * @end_addr: virtual address at which to end unmapping
  * @tree_end: The maximum index to check
- * @mm_wr_locked: lock flag
  *
  * Unmap all pages in the vma list.
  *
@@ -2085,8 +2083,7 @@ static void unmap_single_vma(struct mmu_gather *tlb,
  */
 void unmap_vmas(struct mmu_gather *tlb, struct ma_state *mas,
 		struct vm_area_struct *vma, unsigned long start_addr,
-		unsigned long end_addr, unsigned long tree_end,
+		unsigned long end_addr, unsigned long tree_end)
-		bool mm_wr_locked)
 {
 	struct mmu_notifier_range range;
 	struct zap_details details = {
@@ -2102,8 +2099,7 @@ void unmap_vmas(struct mmu_gather *tlb, struct ma_state *mas,
 		unsigned long start = start_addr;
 		unsigned long end = end_addr;
 		hugetlb_zap_begin(vma, &start, &end);
-		unmap_single_vma(tlb, vma, start, end, &details,
+		unmap_single_vma(tlb, vma, start, end, &details);
-				 mm_wr_locked);
 		hugetlb_zap_end(vma, &details);
 		vma = mas_find(mas, tree_end - 1);
 	} while (vma && likely(!xa_is_zero(vma)));
@@ -2139,7 +2135,7 @@ void zap_page_range_single_batched(struct mmu_gather *tlb,
 	 * unmap 'address-end' not 'range.start-range.end' as range
 	 * could have been expanded for hugetlb pmd sharing.
 	 */
-	unmap_single_vma(tlb, vma, address, end, details, false);
+	unmap_single_vma(tlb, vma, address, end, details);
 	mmu_notifier_invalidate_range_end(&range);
 	if (is_vm_hugetlb_page(vma)) {
 		/*

mm/mmap.c

@@ -1274,7 +1274,7 @@ void exit_mmap(struct mm_struct *mm)
 	tlb_gather_mmu_fullmm(&tlb, mm);
 	/* update_hiwater_rss(mm) here? but nobody should be looking */
 	/* Use ULONG_MAX here to ensure all VMAs in the mm are unmapped */
-	unmap_vmas(&tlb, &vmi.mas, vma, 0, ULONG_MAX, ULONG_MAX, false);
+	unmap_vmas(&tlb, &vmi.mas, vma, 0, ULONG_MAX, ULONG_MAX);
 	mmap_read_unlock(mm);
 
 	/*

mm/vma.c

@@ -483,8 +483,7 @@ void unmap_region(struct ma_state *mas, struct vm_area_struct *vma,
 
 	tlb_gather_mmu(&tlb, mm);
 	update_hiwater_rss(mm);
-	unmap_vmas(&tlb, mas, vma, vma->vm_start, vma->vm_end, vma->vm_end,
+	unmap_vmas(&tlb, mas, vma, vma->vm_start, vma->vm_end, vma->vm_end);
-		   /* mm_wr_locked = */ true);
 	mas_set(mas, vma->vm_end);
 	free_pgtables(&tlb, mas, vma, prev ? prev->vm_end : FIRST_USER_ADDRESS,
 		      next ? next->vm_start : USER_PGTABLES_CEILING,
@@ -1228,7 +1227,7 @@ static inline void vms_clear_ptes(struct vma_munmap_struct *vms,
 	tlb_gather_mmu(&tlb, vms->vma->vm_mm);
 	update_hiwater_rss(vms->vma->vm_mm);
 	unmap_vmas(&tlb, mas_detach, vms->vma, vms->start, vms->end,
-		   vms->vma_count, mm_wr_locked);
+		   vms->vma_count);
 
 	mas_set(mas_detach, 1);
 	/* start and end may be different if there is no prev or next vma. */

tools/testing/vma/vma_internal.h

@@ -848,8 +848,7 @@ static inline void update_hiwater_vm(struct mm_struct *mm)
 
 static inline void unmap_vmas(struct mmu_gather *tlb, struct ma_state *mas,
 		      struct vm_area_struct *vma, unsigned long start_addr,
-		      unsigned long end_addr, unsigned long tree_end,
+		      unsigned long end_addr, unsigned long tree_end)
-		      bool mm_wr_locked)
 {
 }