From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Date: Mon, 16 Nov 2015 16:33:55 +0000 (-0500)
Subject: sparc64: allocate membarrier system call number
X-Git-Tag: v0.10.0~59
X-Git-Url: https://git.lttng.org./?a=commitdiff_plain;h=994d4955b9fff8b8b695c7ad887a91357f6964c4;p=userspace-rcu.git

sparc64: allocate membarrier system call number

Now that the membarrier system call is allocated on sparc, allocate
its number in our architecture header if the system headers don't
allocate it. This allows using the membarrier system call as soon as
implemented in the kernel, even if the distribution has old kernel
headers.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
---

diff --git a/urcu/arch/sparc64.h b/urcu/arch/sparc64.h
index 6ce323f..1ff40f5 100644
--- a/urcu/arch/sparc64.h
+++ b/urcu/arch/sparc64.h
@@ -30,6 +30,14 @@
 extern "C" {
 #endif
 
+/*
+ * On Linux, define the membarrier system call number if not yet available in
+ * the system headers.
+ */
+#if (defined(__linux__) && !defined(__NR_membarrier))
+#define __NR_membarrier		351
+#endif
+
 #define CAA_CACHE_LINE_SIZE	256
 
 /*