LU-8130 libcfs: prepare rhashtable support

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

diff --git a/libcfs/autoconf/lustre-libcfs.m4 b/libcfs/autoconf/lustre-libcfs.m4
index 0803c70..d437331 100644 (file)
--- a/libcfs/autoconf/lustre-libcfs.m4
+++ b/libcfs/autoconf/lustre-libcfs.m4
@@ -749,6 +749,18 @@ get_user_pages_6arg, [
 ]) # LIBCFS_GET_USER_PAGES_6ARG
 
 #
+# LIBCFS_STRINGHASH
+#
+# 4.6 kernel created stringhash.h which moved stuff out of dcache.h
+# commit f4bcbe792b8f434e32487cff9d9e30ab45a3ce02
+#
+AC_DEFUN([LIBCFS_STRINGHASH], [
+LB_CHECK_LINUX_HEADER([linux/stringhash.h], [
+       AC_DEFINE(HAVE_STRINGHASH, 1,
+               [stringhash.h is present])])
+]) # LIBCFS_STRINGHASH
+
+#
 # LIBCFS_STACKTRACE_OPS
 #
 # Kernel version 4.8 commit c8fe4609827aedc9c4b45de80e7cdc8ccfa8541b
@@ -814,6 +826,25 @@ LB_CHECK_LINUX_HEADER([linux/sched/signal.h], [
 ]) # LIBCFS_SCHED_HEADERS
 
 #
+# Kernel version 4.11 commit f9fe1c12d126f9887441fa5bb165046f30ddd4b5
+# introduced rhashtable_lookup_get_insert_fast
+#
+AC_DEFUN([LIBCFS_RHASHTABLE_LOOKUP_GET_INSERT_FAST], [
+LB_CHECK_COMPILE([if 'rhashtable_lookup_get_insert_fast' exist],
+rhashtable_lookup_get_insert_fast, [
+       #include <linux/rhashtable.h>
+],[
+       const struct rhashtable_params params = { 0 };
+       void *ret;
+
+       ret = rhashtable_lookup_get_insert_fast(NULL, NULL, params);
+],[
+       AC_DEFINE(HAVE_RHASHTABLE_LOOKUP_GET_INSERT_FAST, 1,
+               [rhashtable_lookup_get_insert_fast() is available])
+])
+]) # LIBCFS_RHASHTABLE_LOOKUP_GET_INSERT_FAST
+
+#
 # LIBCFS_WAIT_QUEUE_ENTRY
 #
 # Kernel version 4.13 ac6424b981bce1c4bc55675c6ce11bfe1bbfa64f
@@ -966,6 +997,7 @@ LIBCFS_EXPORT_KSET_FIND_OBJ
 # 4.6
 LIBCFS_STACKTRACE_OPS_ADDRESS_RETURN_INT
 LIBCFS_GET_USER_PAGES_6ARG
+LIBCFS_STRINGHASH
 # 4.8
 LIBCFS_STACKTRACE_OPS
 # 4.9
@@ -973,6 +1005,7 @@ LIBCFS_GET_USER_PAGES_GUP_FLAGS
 # 4.10
 LIBCFS_HOTPLUG_STATE_MACHINE
 # 4.11
+LIBCFS_RHASHTABLE_LOOKUP_GET_INSERT_FAST
 LIBCFS_SCHED_HEADERS
 # 4.13
 LIBCFS_WAIT_QUEUE_ENTRY