From: Hauke Mehrtens <hauke@hauke-m.de>
Date: Sun, 22 May 2011 10:47:33 +0000 (+0200)
Subject: compat: backport RCU_INIT_POINTER
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=092edf5ac80e46c0ea76f3945fbd71aded7acb2d;p=openwrt%2Fstaging%2Fblogic.git

compat: backport RCU_INIT_POINTER

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
---

diff --git a/include/linux/compat-2.6.37.h b/include/linux/compat-2.6.37.h
index a83c9c726214..e0dd6b43b3e7 100644
--- a/include/linux/compat-2.6.37.h
+++ b/include/linux/compat-2.6.37.h
@@ -115,6 +115,15 @@ extern void *vzalloc(unsigned long size);
 #define rtnl_dereference(p)                                     \
         rcu_dereference_protected(p, lockdep_rtnl_is_held())
 
+/**
+ * RCU_INIT_POINTER() - initialize an RCU protected pointer
+ *
+ * Initialize an RCU-protected pointer in such a way to avoid RCU-lockdep
+ * splats.
+ */
+#define RCU_INIT_POINTER(p, v) \
+		p = (typeof(*v) __force __rcu *)(v)
+
 #endif /* (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,37)) */
 
 #endif /* LINUX_26_37_COMPAT_H */