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mm/vma: add page table limit to unmap_region()

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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 <Liam.Howlett@oracle.com>
Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Reviewed-by: Pedro Falcato <pfalcato@suse.de>
Cc: Baoquan He <bhe@redhat.com>
Cc: Barry Song <baohua@kernel.org>
Cc: Chris Li <chrisl@kernel.org>
Cc: David Hildenbrand <david@kernel.org>
Cc: David Hildenbrand <david@redhat.com>
Cc: Jann Horn <jannh@google.com>
Cc: Kairui Song <kasong@tencent.com>
Cc: Kemeng Shi <shikemeng@huaweicloud.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Nhat Pham <nphamcs@gmail.com>
Cc: SeongJae Park <sj@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Liam R. Howlett 2026-01-21 11:49:41 -05:00 • committed by Andrew Morton
parent eda8c5e776
commit 243de0c0dc
2 changed files with 6 additions and 4 deletions
Download patch file Download diff file Expand all files Collapse all files

7
mm/vma.c
View file

@ -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;

3
mm/vma.h
View file

@ -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