b=23289 new API: cfs_waitq_add_exclusive_head

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

diff --git a/libcfs/autoconf/lustre-libcfs.m4 b/libcfs/autoconf/lustre-libcfs.m4
index 0aaf7d3..c09767a 100644 (file)
--- a/libcfs/autoconf/lustre-libcfs.m4
+++ b/libcfs/autoconf/lustre-libcfs.m4
@@ -632,6 +632,29 @@ LB_LINUX_TRY_COMPILE([
 ])
 
 #
+# LIBCFS_ADD_WAIT_QUEUE_EXCLUSIVE
+#
+# 2.6.34 adds __add_wait_queue_exclusive
+#
+AC_DEFUN([LIBCFS_ADD_WAIT_QUEUE_EXCLUSIVE],
+[AC_MSG_CHECKING([if __add_wait_queue_exclusive exists])
+LB_LINUX_TRY_COMPILE([
+        #include <linux/wait.h>
+],[
+        wait_queue_head_t queue;
+        wait_queue_t      wait;
+
+        __add_wait_queue_exclusive(&queue, &wait);
+],[
+        AC_MSG_RESULT(yes)
+        AC_DEFINE(HAVE___ADD_WAIT_QUEUE_EXCLUSIVE, 1,
+                  [__add_wait_queue_exclusive exists])
+],[
+        AC_MSG_RESULT(no)
+])
+])
+
+#
 # LIBCFS_PROG_LINUX
 #
 # LNet linux kernel checks
@@ -679,6 +702,8 @@ LIBCFS_FUNC_UNSHARE_FS_STRUCT
 LIBCFS_SOCK_MAP_FD_2ARG
 # 2.6.32
 LIBCFS_STACKTRACE_OPS_HAVE_WALK_STACK
+# 2.6.34
+LIBCFS_ADD_WAIT_QUEUE_EXCLUSIVE
 ])
 
 #