+ tools-lib-rbtree-pick-some-improvements-from-the-kernel-rbtree-code.patch added to mm-nonmm-unstable branch

+ tools-lib-rbtree-pick-some-improvements-from-the-kernel-rbtree-code.patch added to mm-nonmm-unstable branch

[Andrew Morton]

The patch titled
     Subject: tools lib rbtree: Pick some improvements from the kernel rbtree code
has been added to the -mm mm-nonmm-unstable branch.  Its filename is
     tools-lib-rbtree-pick-some-improvements-from-the-kernel-rbtree-code.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/tools-lib-rbtree-pick-some-improvements-from-the-kernel-rbtree-code.patch

This patch will later appear in the mm-nonmm-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------
From: Arnaldo Carvalho de Melo <acme@redhat.com>
Subject: tools lib rbtree: Pick some improvements from the kernel rbtree code
Date: Tue, 23 Apr 2024 17:27:57 -0300

The tools/lib/rbtree.c code came from the kernel.  Remove the
EXPORT_SYMBOL() that make sense only there.  Unfortunately it is not being
checked with tools/perf/check_headers.sh.  Will try to remedy this.  Until
then pick the improvements from:

  b0687c1119b4e8c8 ("lib/rbtree: use '+' instead of '|' for setting color.")

That I noticed by doing:

  diff -u tools/lib/rbtree.c lib/rbtree.c
  diff -u tools/include/linux/rbtree_augmented.h include/linux/rbtree_augmented.h

There is one other cases, but lets pick it in separate patches.

Link: https://lkml.kernel.org/r/ZigZzeFoukzRKG1Q@x1
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Noah Goldstein <goldstein.w.n@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 tools/include/linux/rbtree_augmented.h |    4 ++--
 tools/lib/rbtree.c                     |    2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

--- a/tools/include/linux/rbtree_augmented.h~tools-lib-rbtree-pick-some-improvements-from-the-kernel-rbtree-code
+++ a/tools/include/linux/rbtree_augmented.h
@@ -158,13 +158,13 @@ RB_DECLARE_CALLBACKS(RBSTATIC, RBNAME,
 
 static inline void rb_set_parent(struct rb_node *rb, struct rb_node *p)
 {
-	rb->__rb_parent_color = rb_color(rb) | (unsigned long)p;
+	rb->__rb_parent_color = rb_color(rb) + (unsigned long)p;
 }
 
 static inline void rb_set_parent_color(struct rb_node *rb,
 				       struct rb_node *p, int color)
 {
-	rb->__rb_parent_color = (unsigned long)p | color;
+	rb->__rb_parent_color = (unsigned long)p + color;
 }
 
 static inline void
--- a/tools/lib/rbtree.c~tools-lib-rbtree-pick-some-improvements-from-the-kernel-rbtree-code
+++ a/tools/lib/rbtree.c
@@ -58,7 +58,7 @@
 
 static inline void rb_set_black(struct rb_node *rb)
 {
-	rb->__rb_parent_color |= RB_BLACK;
+	rb->__rb_parent_color += RB_BLACK;
 }
 
 static inline struct rb_node *rb_red_parent(struct rb_node *red)
_

Patches currently in -mm which might be from acme@redhat.com are

tools-lib-rbtree-pick-some-improvements-from-the-kernel-rbtree-code.patch