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 286f717..09e256a 100644 (file)
--- a/lustre/autoconf/lustre-core.m4
+++ b/lustre/autoconf/lustre-core.m4
@@ -996,6 +996,23 @@ aio_complete, [
 ]) # LC_HAVE_AIO_COMPLETE
 
 #
+# LC_HAVE_IS_ROOT_INODE
+#
+# 3.19 kernel adds is_root_inode()
+# Commit a7400222e3eb ("new helper: is_root_inode()")
+#
+AC_DEFUN([LC_HAVE_IS_ROOT_INODE], [
+LB_CHECK_COMPILE([if kernel has is_root_inode() ],
+is_root_inode, [
+       #include <linux/fs.h>
+],[
+       is_root_inode(NULL);
+],[
+       AC_DEFINE(HAVE_IS_ROOT_INODE, 1, [is_root_inode defined])
+])
+]) # LC_HAVE_IS_ROOT_INODE
+
+#
 # LC_BACKING_DEV_INFO_REMOVAL
 #
 # 3.20 kernel removed backing_dev_info from address_space
@@ -1972,6 +1989,33 @@ 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
@@ -2369,6 +2413,7 @@ AC_DEFUN([LC_PROG_LINUX], [
        LC_KIOCB_HAS_NBYTES
        LC_HAVE_DQUOT_QC_DQBLK
        LC_HAVE_AIO_COMPLETE
+       LC_HAVE_IS_ROOT_INODE
 
        # 3.20
        LC_BACKING_DEV_INFO_REMOVAL
@@ -2452,6 +2497,7 @@ AC_DEFUN([LC_PROG_LINUX], [
        # 4.14
        LC_PAGEVEC_INIT_ONE_PARAM
        LC_BI_BDEV
+       LC_INTERVAL_TREE_CACHED
 
        # 4.17
        LC_VM_FAULT_T