diff options
| author |   Christoph Hellwig <hch@lst.de> | 2019-08-28 16:19:54 +0200 |
|---|---|---|
| committer |   Jason Gunthorpe <jgg@mellanox.com> | 2019-09-07 04:28:04 -0300 |
| commit | 7b86ac3371b70c3fd8fd95501719beb1faab719f (patch) | |
| tree | b7f61e4615d249563f09567a22ee399634c898dd /mm/migrate.c | |
| parent | mm: split out a new pagewalk.h header from mm.h (diff) | |
| download | wireguard-linux-7b86ac3371b70c3fd8fd95501719beb1faab719f.tar.xz wireguard-linux-7b86ac3371b70c3fd8fd95501719beb1faab719f.zip | |
pagewalk: separate function pointers from iterator data
The mm_walk structure currently mixed data and code. Split out the
operations vectors into a new mm_walk_ops structure, and while we are
changing the API also declare the mm_walk structure inside the
walk_page_range and walk_page_vma functions.
Based on patch from Linus Torvalds.
Link: https://lore.kernel.org/r/20190828141955.22210-3-hch@lst.de
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Steven Price <steven.price@arm.com>
Reviewed-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Diffstat (limited to 'mm/migrate.c')
| -rw-r--r-- | mm/migrate.c | 23 |
1 files changed, 11 insertions, 12 deletions
diff --git a/mm/migrate.c b/mm/migrate.c index c9c73a35aca7..9f4ed4e985c1 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -2320,6 +2320,11 @@ next: return 0; } +static const struct mm_walk_ops migrate_vma_walk_ops = { + .pmd_entry = migrate_vma_collect_pmd, + .pte_hole = migrate_vma_collect_hole, +}; + /* * migrate_vma_collect() - collect pages over a range of virtual addresses * @migrate: migrate struct containing all migration information @@ -2331,21 +2336,15 @@ next: static void migrate_vma_collect(struct migrate_vma *migrate) { struct mmu_notifier_range range; - struct mm_walk mm_walk = { - .pmd_entry = migrate_vma_collect_pmd, - .pte_hole = migrate_vma_collect_hole, - .vma = migrate->vma, - .mm = migrate->vma->vm_mm, - .private = migrate, - }; - mmu_notifier_range_init(&range, MMU_NOTIFY_CLEAR, 0, NULL, mm_walk.mm, - migrate->start, - migrate->end); + mmu_notifier_range_init(&range, MMU_NOTIFY_CLEAR, 0, NULL, + migrate->vma->vm_mm, migrate->start, migrate->end); mmu_notifier_invalidate_range_start(&range); - walk_page_range(migrate->start, migrate->end, &mm_walk); - mmu_notifier_invalidate_range_end(&range); + walk_page_range(migrate->vma->vm_mm, migrate->start, migrate->end, + &migrate_vma_walk_ops, migrate); + + mmu_notifier_invalidate_range_end(&range); migrate->end = migrate->start + (migrate->npages << PAGE_SHIFT); } |