LU-8066 obd: final pieces for sysfs/debugfs support.

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

diff --git a/lustre/autoconf/lustre-core.m4 b/lustre/autoconf/lustre-core.m4
index cfe5efb..3539bf9 100644 (file)
--- a/lustre/autoconf/lustre-core.m4
+++ b/lustre/autoconf/lustre-core.m4
@@ -1593,6 +1593,24 @@ truncate_pagecache_old_size, [
 ]) # LC_OLDSIZE_TRUNCATE_PAGECACHE
 
 #
+# LC_PTR_ERR_OR_ZERO
+#
+# For some reason SLES11SP4 is missing the PTR_ERR_OR_ZERO macro
+# It was added to linux kernel 3.12
+#
+AC_DEFUN([LC_PTR_ERR_OR_ZERO_MISSING], [
+LB_CHECK_COMPILE([if 'PTR_ERR_OR_ZERO' is missing],
+is_err_or_null, [
+       #include <linux/err.h>
+],[
+       if (PTR_ERR_OR_ZERO(NULL)) return 0;
+],[
+       AC_DEFINE(HAVE_PTR_ERR_OR_ZERO, 1,
+               ['PTR_ERR_OR_ZERO' exist])
+])
+]) # LC_PTR_ERR_OR_ZERO_MISSING
+
+#
 # LC_HAVE_DENTRY_D_U_D_ALIAS
 #
 # 3.11 kernel moved d_alias to the union d_u in struct dentry
@@ -2836,6 +2854,7 @@ AC_DEFUN([LC_PROG_LINUX], [
 
        # 3.12
        LC_OLDSIZE_TRUNCATE_PAGECACHE
+       LC_PTR_ERR_OR_ZERO_MISSING
        LC_KIOCB_KI_LEFT
 
        # 3.13