From: Joe Stringer <joestrin...@nicira.com>
Signed-off-by: Joe Stringer <joestrin...@nicira.com>
---
acinclude.m4 | 1 +
datapath/linux/compat/include/linux/random.h | 7 +++++++
2 files changed, 8 insertions(+)
diff --git a/acinclude.m4 b/acinclude.m4
index da1d39704c7b..090712e356df 100644
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -381,6 +381,7 @@ AC_DEFUN([OVS_CHECK_LINUX_COMPAT], [
[OVS_DEFINE([HAVE_NF_CT_TMPL_ALLOC_TAKES_STRUCT_ZONE])])
OVS_GREP_IFELSE([$KSRC/include/linux/random.h], [prandom_u32])
+ OVS_GREP_IFELSE([$KSRC/include/linux/random.h], [prandom_u32_max])
OVS_GREP_IFELSE([$KSRC/include/net/rtnetlink.h], [get_link_net])
OVS_GREP_IFELSE([$KSRC/include/net/rtnetlink.h], [name_assign_type])
diff --git a/datapath/linux/compat/include/linux/random.h
b/datapath/linux/compat/include/linux/random.h
index f2a6d6aa1468..5c088a2d860b 100644
--- a/datapath/linux/compat/include/linux/random.h
+++ b/datapath/linux/compat/include/linux/random.h
@@ -7,4 +7,11 @@
#define prandom_u32() random32()
#endif
+#ifndef HAVE_PRANDOM_U32_MAX
+static inline u32 prandom_u32_max(u32 ep_ro)
+{
+ return (u32)(((u64) prandom_u32() * ep_ro) >> 32);
+}
+#endif
+
#endif
--
2.1.4
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