Read the left and right trees once, so that the gating
tests are meaningful. This was only a problem at -O0,
where the compiler didn't CSE the two reads.
Changes for v2:
* Use qatomic_read for left/right while searching (pmm)
* Use qatomic_set_mb when inserting a new node, so that
we're sure that the new node is consistent.
* Abundance of caution: Use qatomic_read/set for manipulating parent.
r~
Richard Henderson (4):
util/interval-tree: Use qatomic_read for left/right while searching
util/interval-tree: Use qatomic_set_mb in rb_link_node
util/interval-tree: Introduce pc_parent
util/interval-tree: Use qatomic_read/set for rb_parent_color
util/interval-tree.c | 79 +++++++++++++++++++++++++++-----------------
1 file changed, 48 insertions(+), 31 deletions(-)
--
2.34.1
