diff options
| author | Michel Lespinasse <walken@google.com> | 2012-10-09 03:31:21 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-10-09 11:22:38 +0400 |
| commit | 3908836aa77e3621aaf2101f2920e01d7c8460d6 (patch) | |
| tree | 3e8f5b619f9e093d9d53180bb6f496319ddeb946 /arch | |
| parent | 9d9e6f9703bbd642f3f2f807e6aaa642a4cbcec9 (diff) | |
| download | linux-3908836aa77e3621aaf2101f2920e01d7c8460d6.tar.xz | |
rbtree: add RB_DECLARE_CALLBACKS() macro
As proposed by Peter Zijlstra, this makes it easier to define the augmented
rbtree callbacks.
Signed-off-by: Michel Lespinasse <walken@google.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/mm/pat_rbtree.c | 37 |
1 files changed, 2 insertions, 35 deletions
diff --git a/arch/x86/mm/pat_rbtree.c b/arch/x86/mm/pat_rbtree.c index 7e1515bd4770..4d116959075d 100644 --- a/arch/x86/mm/pat_rbtree.c +++ b/arch/x86/mm/pat_rbtree.c @@ -69,41 +69,8 @@ static u64 compute_subtree_max_end(struct memtype *data) return max_end; } -/* Update 'subtree_max_end' for node and its parents */ -static void memtype_rb_propagate_cb(struct rb_node *node, struct rb_node *stop) -{ - while (node != stop) { - struct memtype *data = container_of(node, struct memtype, rb); - u64 subtree_max_end = compute_subtree_max_end(data); - if (data->subtree_max_end == subtree_max_end) - break; - data->subtree_max_end = subtree_max_end; - node = rb_parent(&data->rb); - } -} - -static void memtype_rb_copy_cb(struct rb_node *old, struct rb_node *new) -{ - struct memtype *old_data = container_of(old, struct memtype, rb); - struct memtype *new_data = container_of(new, struct memtype, rb); - - new_data->subtree_max_end = old_data->subtree_max_end; -} - -/* Update 'subtree_max_end' after tree rotation. old and new are the - * former and current subtree roots */ -static void memtype_rb_rotate_cb(struct rb_node *old, struct rb_node *new) -{ - struct memtype *old_data = container_of(old, struct memtype, rb); - struct memtype *new_data = container_of(new, struct memtype, rb); - - new_data->subtree_max_end = old_data->subtree_max_end; - old_data->subtree_max_end = compute_subtree_max_end(old_data); -} - -static const struct rb_augment_callbacks memtype_rb_augment_cb = { - memtype_rb_propagate_cb, memtype_rb_copy_cb, memtype_rb_rotate_cb -}; +RB_DECLARE_CALLBACKS(static, memtype_rb_augment_cb, struct memtype, rb, + u64, subtree_max_end, compute_subtree_max_end) /* Find the first (lowest start addr) overlapping range from rb tree */ static struct memtype *memtype_rb_lowest_match(struct rb_root *root, |