X-Git-Url: https://git.liburcu.org/?p=urcu.git;a=blobdiff_plain;f=arch_x86.h;h=e924913ebc235d308ed088f1fe6fd455ba591a67;hp=99ccd298dce87faada641ddc11e017c97c8eeced;hb=121a5d44c8cc7197116df73854cb94c6cfbad0b0;hpb=ad7de003b45b3a7339b90208c321517c2dcbdc3e

diff --git a/arch_x86.h b/arch_x86.h
index 99ccd29..e924913 100644
--- a/arch_x86.h
+++ b/arch_x86.h
@@ -1,3 +1,6 @@
+#ifndef _ARCH_X86_H
+#define _ARCH_X86_H
+
 /*
  * arch_x86.h: Definitions for the x86 architecture, derived from Linux.
  *
@@ -18,6 +21,8 @@
  * Copyright (c) 2009 Paul E. McKenney, IBM Corporation.
  */
 
+#include <compiler.h>
+
 /* Assume P4 or newer */
 #define CONFIG_HAVE_FENCE 1
 #define CONFIG_HAVE_MEM_COHERENCY
@@ -51,6 +56,28 @@
 #define rmc()	barrier()
 #define wmc()	barrier()
 
+/* Assume SMP machine, given we don't have this information */
+#define CONFIG_SMP 1
+
+#ifdef CONFIG_SMP
+#define smp_mb()	mb()
+#define smp_rmb()	rmb()
+#define smp_wmb()	wmb()
+#define smp_mc()	mc()
+#define smp_rmc()	rmc()
+#define smp_wmc()	wmc()
+#else
+#define smp_mb()	barrier()
+#define smp_rmb()	barrier()
+#define smp_wmb()	barrier()
+#define smp_mc()	barrier()
+#define smp_rmc()	barrier()
+#define smp_wmc()	barrier()
+#endif
+
+/* Nop everywhere except on alpha. */
+#define smp_read_barrier_depends()
+
 /* REP NOP (PAUSE) is a good thing to insert into busy-wait loops. */
 static inline void rep_nop(void)
 {
@@ -135,3 +162,5 @@ static inline cycles_t get_cycles (void)
         rdtscll(ret);
         return ret;
 }
+
+#endif /* _ARCH_X86_H */