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alpha: allocate membarrier system call number
[userspace-rcu.git]
/
include
/
urcu
/
arch
/
alpha.h
diff --git
a/include/urcu/arch/alpha.h
b/include/urcu/arch/alpha.h
index e61f82c0728047528acf484d74cf7011a892914c..dc33e28d3c1966863bff4775a4bc308f4e179cb4 100644
(file)
--- a/
include/urcu/arch/alpha.h
+++ b/
include/urcu/arch/alpha.h
@@
-33,6
+33,14
@@
extern "C" {
#define cmm_wmb() __asm__ __volatile__ ("wmb":::"memory")
#define cmm_read_barrier_depends() __asm__ __volatile__ ("mb":::"memory")
#define cmm_wmb() __asm__ __volatile__ ("wmb":::"memory")
#define cmm_read_barrier_depends() __asm__ __volatile__ ("mb":::"memory")
+/*
+ * 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 517
+#endif
+
#ifdef __cplusplus
}
#endif
#ifdef __cplusplus
}
#endif
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