[PATCH v2 05/10] mm/vma: Add page table limit to unmap_region()

["Liam R. Howlett" <Liam.Howlett@oracle.com>]

The unmap_region() calls need to pass through the page table limit for a
future patch.

No functional changes intended.

Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Reviewed-by: Pedro Falcato <pfalcato@suse.de>
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
---
 mm/vma.c | 7 ++++---
 mm/vma.h | 3 ++-
 2 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/mm/vma.c b/mm/vma.c
index b2b9e7b3284f3..b92383e5eebd1 100644
--- a/mm/vma.c
+++ b/mm/vma.c
@@ -474,7 +474,8 @@ void remove_vma(struct vm_area_struct *vma)
  */
 void unmap_region(struct ma_state *mas, struct vm_area_struct *vma,
 		unsigned long vma_start, unsigned long vma_end,
-		struct vm_area_struct *prev, struct vm_area_struct *next)
+		unsigned long pg_max, struct vm_area_struct *prev,
+		struct vm_area_struct *next)
 {
 	struct mm_struct *mm = vma->vm_mm;
 	struct mmu_gather tlb;
@@ -484,8 +485,7 @@ void unmap_region(struct ma_state *mas, struct vm_area_struct *vma,
 	unmap_vmas(&tlb, mas, vma, vma_start, vma_end, vma_end);
 	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,
-		      next ? next->vm_start : USER_PGTABLES_CEILING,
+		      pg_max, next ? next->vm_start : USER_PGTABLES_CEILING,
 		      /* mm_wr_locked = */ true);
 	tlb_finish_mmu(&tlb);
 }
@@ -2469,6 +2469,7 @@ static int __mmap_new_file_vma(struct mmap_state *map,
 		vma_iter_set(vmi, vma->vm_end);
 		/* Undo any partial mapping done by a device driver. */
 		unmap_region(&vmi->mas, vma, vma->vm_start, vma->vm_end,
+			     map->next ? map->next->vm_start : USER_PGTABLES_CEILING,
 			     map->prev, map->next);
 
 		return error;
diff --git a/mm/vma.h b/mm/vma.h
index e671adced3a03..7c2c95fef240b 100644
--- a/mm/vma.h
+++ b/mm/vma.h
@@ -265,7 +265,8 @@ void remove_vma(struct vm_area_struct *vma);
 
 void unmap_region(struct ma_state *mas, struct vm_area_struct *vma,
 		unsigned long vma_start, unsigned long vma_end,
-		struct vm_area_struct *prev, struct vm_area_struct *next);
+		unsigned long pg_max, struct vm_area_struct *prev,
+		struct vm_area_struct *next);
 
 /**
  * vma_modify_flags() - Perform any necessary split/merge in preparation for
-- 
2.47.3