From 2cadb5a98f2bd1bdf2cb060bb334daf367ca657a Mon Sep 17 00:00:00 2001
From: Steffen Vogel <post@steffenvogel.de>
Date: Sun, 2 Dec 2018 02:49:18 +0100
Subject: [PATCH] use better heuristic for compile-time cache line size

---
 common/include/villas/config.h.in | 7 +++++++
 common/lib/kernel/kernel.c        | 4 +---
 2 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/common/include/villas/config.h.in b/common/include/villas/config.h.in
index e891e2b67..8eb53710f 100644
--- a/common/include/villas/config.h.in
+++ b/common/include/villas/config.h.in
@@ -57,3 +57,10 @@
 /** Width of log output in characters */
 #define LOG_WIDTH		80
 #define LOG_HEIGHT		25
+
+/* Hard-coded cache line size */
+#if defined(__x86_64__) || defined(__i386__) || defined(__arm__)
+  #define CACHELINE_SIZE 64
+#else
+  #error "Unsupported architecture"
+#endif
diff --git a/common/lib/kernel/kernel.c b/common/lib/kernel/kernel.c
index 8fa13ce8a..e5fd3b4d7 100644
--- a/common/lib/kernel/kernel.c
+++ b/common/lib/kernel/kernel.c
@@ -52,10 +52,8 @@ int kernel_get_cacheline_size()
 	pclose(fp);
 
 	return ret == 1 ? size : -1;
-#elif defined(__x86_64__) || defined(__i386__)
-	return 64; /** @todo fixme */
 #else
-  #error "Unsupported architecture"
+	return CACHELINE_SIZE;
 #endif
 }