LU-12400 lnet: Infiniband sg_dma changes for linux 5.1

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

diff --git a/lnet/autoconf/lustre-lnet.m4 b/lnet/autoconf/lustre-lnet.m4
index 01fec90..8494135 100644 (file)
--- a/lnet/autoconf/lustre-lnet.m4
+++ b/lnet/autoconf/lustre-lnet.m4
@@ -789,6 +789,30 @@ EXTRA_KCFLAGS="$tmp_flags"
 ]) # LN_IB_DEVICE_OPS_EXISTS
 
 #
+# LN_IB_SG_DMA_ADDRESS_EXISTS
+#
+# kernel 5.1 commit a163afc88556e099271a7b423295bc5176fcecce
+# IB/core: Remove ib_sg_dma_address() and ib_sg_dma_len()
+# ... when dma_ops existed (3.6) ib_sg_dma_address() was not trivial ...
+#
+AC_DEFUN([LN_IB_SG_DMA_ADDRESS_EXISTS], [
+tmp_flags="$EXTRA_KCFLAGS"
+EXTRA_KCFLAGS="-Werror"
+LB_CHECK_COMPILE([if ib_sg_dma_address wrapper exists],
+ib_sg_dma_address_test, [
+       #include <rdma/ib_verbs.h>
+],[
+       u64 x = ib_sg_dma_address(NULL, NULL);
+       x = x;
+       (void)x;
+],[
+       AC_DEFINE(HAVE_IB_SG_DMA_ADDRESS, 1,
+               [if ib_sg_dma_address wrapper exists])
+])
+EXTRA_KCFLAGS="$tmp_flags"
+]) # LN_IB_SG_DMA_ADDRESS_EXISTS
+
+#
 # LN_PROG_LINUX
 #
 # LNet linux kernel checks
@@ -817,6 +841,8 @@ LN_CONFIG_SOCK_ACCEPT
 LN_CONFIG_SOCK_GETNAME
 # 5.0
 LN_IB_DEVICE_OPS_EXISTS
+# 5.1
+LN_IB_SG_DMA_ADDRESS_EXISTS
 ]) # LN_PROG_LINUX
 
 #