X-Git-Url: https://git.lttng.org/?p=urcu.git;a=blobdiff_plain;f=configure.ac;h=079c145eb9677613f21b6e166efbc8b6ded86510;hp=774094e0ba4b935f5f2b59a3dfb432434b62633a;hb=cfac80429e92064001addbfaf274951e68b16a44;hpb=0e1efa0e8c7961fc3eca21d0268c07f44eb572e5

diff --git a/configure.ac b/configure.ac
index 774094e..079c145 100644
--- a/configure.ac
+++ b/configure.ac
@@ -140,7 +140,10 @@ AS_IF([test "x$ARCHTYPE" = "xx86"],[
 	#For now, using lock; addl compatibility mode even for i686, because the
 	#Pentium III is seen as a i686, but lacks mfence instruction.
 	#Only using fence for x86_64.
-	AS_IF([test "x$host_cpu" != "xi386" -a "x$host_cpu" != "xi486" -a "x$host_cpu" != "xi586" -a "x$host_cpu" != "xi686"],[
+	#
+	#k1om is the name for the Intel MIC family (Xeon Phi). It is an x86_64
+	#variant but lacks fence instructions.
+	AS_IF([test "x$host_cpu" != "xi386" -a "x$host_cpu" != "xi486" -a "x$host_cpu" != "xi586" -a "x$host_cpu" != "xi686" -a "x$host_vendor" != "xk1om"],[
 		AC_MSG_RESULT([yes])
 		AC_DEFINE([CONFIG_RCU_HAVE_FENCE], [1])
 	],[