LU-5205 mdc: Add config check for Xeon Phi build

Add config check for radix_tree_exception_entry()
to not broken Xeon Phi build.

Signed-off-by: Yang Sheng <yang.sheng@intel.com>
Change-Id: I2f405e392003162e779ffbf9055e410917940df7
Reviewed-on: http://review.whamcloud.com/10734
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Dmitry Eremin <dmitry.eremin@intel.com>
Reviewed-by: Bob Glossman <bob.glossman@intel.com>
Reviewed-by: James Simmons <uja.ornl@gmail.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>

diff --git a/lustre/autoconf/lustre-core.m4 b/lustre/autoconf/lustre-core.m4
index ac1696e..b8be8cf 100644 (file)
--- a/lustre/autoconf/lustre-core.m4
+++ b/lustre/autoconf/lustre-core.m4
@@ -867,6 +867,22 @@ LB_CHECK_EXPORT([generic_file_llseek_size], [fs/read_write.c],
 ]) # LC_FILE_LLSEEK_SIZE
 
 #
+# LC_RADIX_EXCEPTION_ENTRY
+# 3.1 adds radix_tree_exception_entry.
+#
+AC_DEFUN([LC_RADIX_EXCEPTION_ENTRY], [
+LB_CHECK_COMPILE([radix_tree_exceptional_entry exist],
+radix_tree_exceptional_entry, [
+       #include <linux/radix-tree.h>
+],[
+       radix_tree_exceptional_entry(NULL);
+],[
+       AC_DEFINE(HAVE_RADIX_EXCEPTION_ENTRY, 1,
+               [radix_tree_exceptional_entry exist])
+])
+]) # LC_RADIX_EXCEPTION_ENTRY
+
+#
 # LC_HAVE_VOID_MAKE_REQUEST_FN
 #
 # 3.2 request_queue.make_request_fn defined as function returns with void
@@ -1516,6 +1532,7 @@ AC_DEFUN([LC_PROG_LINUX], [
        LC_IOP_GET_ACL
        LC_FILE_LLSEEK_SIZE
        LC_INODE_PERMISION_2ARGS
+       LC_RADIX_EXCEPTION_ENTRY
 
        # 3.2
        LC_HAVE_VOID_MAKE_REQUEST_FN

diff --git a/lustre/include/linux/lustre_compat25.h b/lustre/include/linux/lustre_compat25.h
index 3dac0d1..4b6fddf 100644 (file)
--- a/lustre/include/linux/lustre_compat25.h
+++ b/lustre/include/linux/lustre_compat25.h
@@ -352,4 +352,11 @@ static inline struct dentry *d_make_root(struct inode *root)
 #define ll_vfs_unlink(a, b) vfs_unlink(a, b)
 #endif
 
+#ifndef HAVE_RADIX_EXCEPTION_ENTRY
+static inline int radix_tree_exceptional_entry(void *arg)
+{
+       return 0;
+}
+#endif
+
 #endif /* _COMPAT25_H */