LU-11085 nodemap: switch interval tree to in-kernel impl.

[fs/lustre-release.git] / lustre / autoconf / lustre-core.m4

diff --git a/lustre/autoconf/lustre-core.m4 b/lustre/autoconf/lustre-core.m4
index 7eeefa8..09e256a 100644 (file)
--- a/lustre/autoconf/lustre-core.m4
+++ b/lustre/autoconf/lustre-core.m4
@@ -1989,6 +1989,33 @@ bi_bdev, [
 ]) # LC_BI_BDEV
 
 #
 ]) # LC_BI_BDEV
 
 #

+# LC_INTERVAL_TREE_CACHED
+#
+# 4.14 f808c13fd3738948e10196496959871130612b61
+# switched INTERVAL_TREE_DEFINE to use cached RB_Trees.
+#
+AC_DEFUN([LC_INTERVAL_TREE_CACHED], [
+tmp_flags="$EXTRA_KCFLAGS"
+EXTRA_KCFLAGS="-Werror"
+LB_CHECK_COMPILE([if interval_trees use rb_tree_cached],
+itree_cached, [
+       #include <linux/interval_tree_generic.h>
+       struct foo { struct rb_node rb; int last; int a,b;};
+       #define START(n) ((n)->a)
+       #define LAST(n) ((n)->b)
+       struct rb_root_cached tree;
+       INTERVAL_TREE_DEFINE(struct foo, rb, int, last,
+               START, LAST, , foo);
+],[
+       foo_insert(NULL, &tree);
+],[
+       AC_DEFINE(HAVE_INTERVAL_TREE_CACHED, 1,
+               [interval trees use rb_tree_cached])
+])
+EXTRA_KCFLAGS="$tmp_flags"
+]) # LC_INTERVAL_TREE_CACHED
+
+#

 # LC_IS_ENCRYPTED
 #
 # 4.14 introduced IS_ENCRYPTED and S_ENCRYPTED
 # LC_IS_ENCRYPTED
 #
 # 4.14 introduced IS_ENCRYPTED and S_ENCRYPTED


@@ -2470,6 +2497,7 @@ AC_DEFUN([LC_PROG_LINUX], [
        # 4.14
        LC_PAGEVEC_INIT_ONE_PARAM
        LC_BI_BDEV
        # 4.14
        LC_PAGEVEC_INIT_ONE_PARAM
        LC_BI_BDEV

+       LC_INTERVAL_TREE_CACHED

 
        # 4.17
        LC_VM_FAULT_T
 
        # 4.17
        LC_VM_FAULT_T