LU-14488 o2ib: Use rdma_connect_locked if it is defined

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

diff --git a/lnet/autoconf/lustre-lnet.m4 b/lnet/autoconf/lustre-lnet.m4
index a9f05e3..03cd3c4 100644 (file)
--- a/lnet/autoconf/lustre-lnet.m4
+++ b/lnet/autoconf/lustre-lnet.m4
@@ -554,6 +554,21 @@ AS_IF([test $ENABLEO2IB != "no"], [
                        [FMR pool API is available])
        ])
 
+       # rdma_connect_locked() was added in Linux 5.10,
+       # commit 071ba4cc559de47160761b9500b72e8fa09d923d
+       # and in MOFED-5.2-2. rdma_connect_locked() must
+       # be called instead of rdma_connect() in
+       # RDMA_CM_EVENT_ROUTE_RESOLVED handler.
+       LB_CHECK_COMPILE([if 'rdma_connect_locked' exists],
+       rdma_connect_locked, [
+               #include <rdma/rdma_cm.h>
+       ],[
+               rdma_connect_locked(NULL, NULL);
+       ],[
+               AC_DEFINE(HAVE_RDMA_CONNECT_LOCKED, 1,
+                       [rdma_connect_locked is defined])
+       ])
+
        EXTRA_CHECK_INCLUDE=""
        AC_DEFUN([LN_CONFIG_O2IB_SRC], [])
        AC_DEFUN([LN_CONFIG_O2IB_RESULTS], [])