LU-6215 gss: cache_head is now on a hlist in 4.3+ kernels

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

diff --git a/lustre/autoconf/lustre-core.m4 b/lustre/autoconf/lustre-core.m4
index ddab73d..00b376f 100644 (file)
--- a/lustre/autoconf/lustre-core.m4
+++ b/lustre/autoconf/lustre-core.m4
@@ -1974,6 +1974,23 @@ LB_CHECK_FILE([$LINUX/include/linux/loop.h], [
 ]) # LC_HAVE_LOOP_CTL_GET_FREE
 
 #
+# LC_HAVE_CACHE_HEAD_HLIST
+#
+# 4.3 kernel swiched to hlist for cache_head
+#
+AC_DEFUN([LC_HAVE_CACHE_HEAD_HLIST], [
+LB_CHECK_COMPILE([if 'struct cache_head' has 'cache_list' field],
+cache_head_has_hlist, [
+       #include <linux/sunrpc/cache.h>
+],[
+       do {} while(sizeof(((struct cache_head *)0)->cache_list));
+],[
+       AC_DEFINE(HAVE_CACHE_HEAD_HLIST, 1,
+               [cache_head has hlist cache_list])
+])
+]) # LC_HAVE_CACHE_HEAD_HLIST
+
+#
 # LC_PROG_LINUX
 #
 # Lustre linux kernel checks
@@ -2135,6 +2152,9 @@ AC_DEFUN([LC_PROG_LINUX], [
        LC_BIO_ENDIO_USES_ONE_ARG
        LC_SYMLINK_OPS_USE_NAMEIDATA
 
+       # 4.3
+       LC_HAVE_CACHE_HEAD_HLIST
+
        #
        AS_IF([test "x$enable_server" != xno], [
                LC_FUNC_DEV_SET_RDONLY