From 243de0c0dc04df4483796869704598dfa567f2e4 Mon Sep 17 00:00:00 2001 From: "Liam R. Howlett" Date: Wed, 21 Jan 2026 11:49:41 -0500 Subject: [PATCH] mm/vma: add page table limit to unmap_region() The unmap_region() calls need to pass through the page table limit for a future patch. No functional changes intended. Link: https://lkml.kernel.org/r/20260121164946.2093480-7-Liam.Howlett@oracle.com Signed-off-by: Liam R. Howlett Reviewed-by: Lorenzo Stoakes Reviewed-by: Pedro Falcato Cc: Baoquan He Cc: Barry Song Cc: Chris Li Cc: David Hildenbrand Cc: David Hildenbrand Cc: Jann Horn Cc: Kairui Song Cc: Kemeng Shi Cc: Matthew Wilcox (Oracle) Cc: Michal Hocko Cc: Mike Rapoport Cc: Nhat Pham Cc: SeongJae Park Cc: Suren Baghdasaryan Cc: Vlastimil Babka Signed-off-by: Andrew Morton --- 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 b2b9e7b3284f..b92383e5eebd 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 e671adced3a0..7c2c95fef240 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