migrate_misplaced_folio_prepare() can be called from a context where VMA isn't available. Allow the migration to work from such contexts too. Signed-off-by: Bharata B Rao <bharata@xxxxxxx> --- mm/migrate.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/mm/migrate.c b/mm/migrate.c index fb19a18892c8..5b21856a0dd0 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -2639,7 +2639,8 @@ static struct folio *alloc_misplaced_dst_folio(struct folio *src, /* * Prepare for calling migrate_misplaced_folio() by isolating the folio if - * permitted. Must be called with the PTL still held. + * permitted. Must be called with the PTL still held if called with a non-NULL + * vma. */ int migrate_misplaced_folio_prepare(struct folio *folio, struct vm_area_struct *vma, int node) @@ -2656,7 +2657,7 @@ int migrate_misplaced_folio_prepare(struct folio *folio, * See folio_likely_mapped_shared() on possible imprecision * when we cannot easily detect if a folio is shared. */ - if ((vma->vm_flags & VM_EXEC) && + if (vma && (vma->vm_flags & VM_EXEC) && folio_likely_mapped_shared(folio)) return -EACCES; -- 2.34.1
