It does not make sense to try to "unlink" the node that is definitely not linked with a list nor tree. On the first merge step VA just points to the previously disconnected busy area.
On the second step, check if the node has been merged and do "unlink" if so, because now it points to an object that must be linked. Signed-off-by: Uladzislau Rezki (Sony) <[email protected]> --- mm/vmalloc.c | 9 +++------ 1 file changed, 3 insertions(+), 6 deletions(-) diff --git a/mm/vmalloc.c b/mm/vmalloc.c index 5302e1b79c7b..89b8f44e8837 100644 --- a/mm/vmalloc.c +++ b/mm/vmalloc.c @@ -718,9 +718,6 @@ merge_or_add_vmap_area(struct vmap_area *va, /* Check and update the tree if needed. */ augment_tree_propagate_from(sibling); - /* Remove this VA, it has been merged. */ - unlink_va(va, root); - /* Free vmap_area object. */ kmem_cache_free(vmap_area_cachep, va); @@ -745,12 +742,12 @@ merge_or_add_vmap_area(struct vmap_area *va, /* Check and update the tree if needed. */ augment_tree_propagate_from(sibling); - /* Remove this VA, it has been merged. */ - unlink_va(va, root); + /* Remove this VA, if it has been merged. */ + if (merged) + unlink_va(va, root); /* Free vmap_area object. */ kmem_cache_free(vmap_area_cachep, va); - return; } } -- 2.11.0
