The patch titled
Subject: rbtree: add RB_DECLARE_CALLBACKS() macro
has been added to the -mm tree. Its filename is
rbtree-add-rb_declare_callbacks-macro.patch
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------------------------------------------------------
From: Michel Lespinasse <walken@xxxxxxxxxx>
Subject: 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@xxxxxxxxxx>
Cc: Rik van Riel <riel@xxxxxxxxxx>
Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Cc: Andrea Arcangeli <aarcange@xxxxxxxxxx>
Cc: David Woodhouse <dwmw2@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/x86/mm/pat_rbtree.c | 37 ++-----------------------------------
include/linux/rbtree.h | 30 ++++++++++++++++++++++++++++++
lib/rbtree_test.c | 34 ++--------------------------------
3 files changed, 34 insertions(+), 67 deletions(-)
diff -puN arch/x86/mm/pat_rbtree.c~rbtree-add-rb_declare_callbacks-macro arch/x86/mm/pat_rbtree.c
--- a/arch/x86/mm/pat_rbtree.c~rbtree-add-rb_declare_callbacks-macro
+++ a/arch/x86/mm/pat_rbtree.c
@@ -69,41 +69,8 @@ static u64 compute_subtree_max_end(struc
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,
diff -puN include/linux/rbtree.h~rbtree-add-rb_declare_callbacks-macro include/linux/rbtree.h
--- a/include/linux/rbtree.h~rbtree-add-rb_declare_callbacks-macro
+++ a/include/linux/rbtree.h
@@ -79,6 +79,36 @@ rb_insert_augmented(struct rb_node *node
__rb_insert_augmented(node, root, augment->rotate);
}
+#define RB_DECLARE_CALLBACKS(rbstatic, rbname, rbstruct, rbfield, \
+ rbtype, rbaugmented, rbcompute) \
+static void rbname ## _propagate(struct rb_node *rb, struct rb_node *stop) \
+{ \
+ while (rb != stop) { \
+ rbstruct *node = rb_entry(rb, rbstruct, rbfield); \
+ rbtype augmented = rbcompute(node); \
+ if (node->rbaugmented == augmented) \
+ break; \
+ node->rbaugmented = augmented; \
+ rb = rb_parent(&node->rbfield); \
+ } \
+} \
+static void rbname ## _copy(struct rb_node *rb_old, struct rb_node *rb_new) \
+{ \
+ rbstruct *old = rb_entry(rb_old, rbstruct, rbfield); \
+ rbstruct *new = rb_entry(rb_new, rbstruct, rbfield); \
+ new->rbaugmented = old->rbaugmented; \
+} \
+static void rbname ## _rotate(struct rb_node *rb_old, struct rb_node *rb_new) \
+{ \
+ rbstruct *old = rb_entry(rb_old, rbstruct, rbfield); \
+ rbstruct *new = rb_entry(rb_new, rbstruct, rbfield); \
+ new->rbaugmented = old->rbaugmented; \
+ old->rbaugmented = rbcompute(old); \
+} \
+rbstatic const struct rb_augment_callbacks rbname = { \
+ rbname ## _propagate, rbname ## _copy, rbname ## _rotate \
+};
+
/* Find logical next and previous nodes in a tree */
extern struct rb_node *rb_next(const struct rb_node *);
diff -puN lib/rbtree_test.c~rbtree-add-rb_declare_callbacks-macro lib/rbtree_test.c
--- a/lib/rbtree_test.c~rbtree-add-rb_declare_callbacks-macro
+++ a/lib/rbtree_test.c
@@ -61,38 +61,8 @@ static inline u32 augment_recompute(stru
return max;
}
-static void augment_propagate(struct rb_node *rb, struct rb_node *stop)
-{
- while (rb != stop) {
- struct test_node *node = rb_entry(rb, struct test_node, rb);
- u32 augmented = augment_recompute(node);
- if (node->augmented == augmented)
- break;
- node->augmented = augmented;
- rb = rb_parent(&node->rb);
- }
-}
-
-static void augment_copy(struct rb_node *rb_old, struct rb_node *rb_new)
-{
- struct test_node *old = rb_entry(rb_old, struct test_node, rb);
- struct test_node *new = rb_entry(rb_new, struct test_node, rb);
- new->augmented = old->augmented;
-}
-
-static void augment_rotate(struct rb_node *rb_old, struct rb_node *rb_new)
-{
- struct test_node *old = rb_entry(rb_old, struct test_node, rb);
- struct test_node *new = rb_entry(rb_new, struct test_node, rb);
-
- /* Rotation doesn't change subtree's augmented value */
- new->augmented = old->augmented;
- old->augmented = augment_recompute(old);
-}
-
-static const struct rb_augment_callbacks augment_callbacks = {
- augment_propagate, augment_copy, augment_rotate
-};
+RB_DECLARE_CALLBACKS(static, augment_callbacks, struct test_node, rb,
+ u32, augmented, augment_recompute)
static void insert_augmented(struct test_node *node, struct rb_root *root)
{
_
Patches currently in -mm which might be from walken@xxxxxxxxxx are
linux-next.patch
ipc-mqueue-remove-unnecessary-rb_init_node-calls.patch
rbtree-reference-documentation-rbtreetxt-for-usage-instructions.patch
rbtree-empty-nodes-have-no-color.patch
rbtree-empty-nodes-have-no-color-fix.patch
rbtree-fix-incorrect-rbtree-node-insertion-in-fs-proc-proc_sysctlc.patch
rbtree-move-some-implementation-details-from-rbtreeh-to-rbtreec.patch
rbtree-move-some-implementation-details-from-rbtreeh-to-rbtreec-fix.patch
rbtree-performance-and-correctness-test.patch
rbtree-performance-and-correctness-test-fix.patch
rbtree-break-out-of-rb_insert_color-loop-after-tree-rotation.patch
rbtree-adjust-root-color-in-rb_insert_color-only-when-necessary.patch
rbtree-adjust-root-color-in-rb_insert_color-only-when-necessary-fix-perf-compilation.patch
rbtree-low-level-optimizations-in-rb_insert_color.patch
rbtree-adjust-node-color-in-__rb_erase_color-only-when-necessary.patch
rbtree-optimize-case-selection-logic-in-__rb_erase_color.patch
rbtree-low-level-optimizations-in-__rb_erase_color.patch
rbtree-coding-style-adjustments.patch
rbtree-optimize-fetching-of-sibling-node.patch
rbtree-test-fix-sparse-warning-about-64-bit-constant.patch
rbtree-add-__rb_change_child-helper-function.patch
rbtree-place-easiest-case-first-in-rb_erase.patch
rbtree-handle-1-child-recoloring-in-rb_erase-instead-of-rb_erase_color.patch
rbtree-low-level-optimizations-in-rb_erase.patch
rbtree-augmented-rbtree-test.patch
rbtree-faster-augmented-rbtree-manipulation.patch
rbtree-remove-prior-augmented-rbtree-implementation.patch
rbtree-add-rb_declare_callbacks-macro.patch
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