Module Name: src
Committed By: riastradh
Date: Mon Aug 27 07:34:23 UTC 2018
Modified Files:
src/sys/external/bsd/drm2/include/linux: rcupdate.h
Log Message:
Fill out <linux/rcupdate.h>. The patent is expired, right?
To generate a diff of this commit:
cvs rdiff -u -r1.3 -r1.4 src/sys/external/bsd/drm2/include/linux/rcupdate.h
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/external/bsd/drm2/include/linux/rcupdate.h
diff -u src/sys/external/bsd/drm2/include/linux/rcupdate.h:1.3 src/sys/external/bsd/drm2/include/linux/rcupdate.h:1.4
--- src/sys/external/bsd/drm2/include/linux/rcupdate.h:1.3 Mon Aug 27 07:31:06 2018
+++ src/sys/external/bsd/drm2/include/linux/rcupdate.h Mon Aug 27 07:34:23 2018
@@ -1,4 +1,4 @@
-/* $NetBSD: rcupdate.h,v 1.3 2018/08/27 07:31:06 riastradh Exp $ */
+/* $NetBSD: rcupdate.h,v 1.4 2018/08/27 07:34:23 riastradh Exp $ */
/*-
* Copyright (c) 2013 The NetBSD Foundation, Inc.
@@ -32,6 +32,52 @@
#ifndef _LINUX_RCUPDATE_H_
#define _LINUX_RCUPDATE_H_
+#include <sys/atomic.h>
+#include <sys/null.h>
+#include <sys/xcall.h>
+
#define __rcu
+#define rcu_assign_pointer(P, V) do { \
+ membar_producer(); \
+ (P) = (V); \
+} while (0)
+
+
+#define rcu_dereference(P) rcu_dereference_protected((P), 1)
+
+#define rcu_dereference_protected(P, C) ({ \
+ WARN_ON(!(C)); \
+ typeof(*(P)) *__rcu_dereference_protected_tmp = (P); \
+ membar_datadep_consumer(); \
+ __rcu_dereference_protected_tmp; \
+})
+
+static inline void
+rcu_read_lock(void)
+{
+
+ kpreempt_disable();
+ __insn_barrier();
+}
+
+static inline void
+rcu_read_unlock(void)
+{
+
+ __insn_barrier();
+ kpreempt_enable();
+}
+
+static inline void
+synchronize_rcu_xc(void *a, void *b)
+{
+}
+
+static inline void
+synchronize_rcu(void)
+{
+ xc_wait(xc_broadcast(0, &synchronize_rcu_xc, NULL, NULL));
+}
+
#endif /* _LINUX_RCUPDATE_H_ */
