From: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Date: Fri, 21 Apr 2017 13:00:13 +0000 (-0700)
Subject: Merge branches 'doc.2017.04.12a', 'fixes.2017.04.19a' and 'srcu.2017.04.21a' into... 
X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=f2094107ac82bf867184efd77cee30b6a98e2e20;p=openwrt%2Fstaging%2Fblogic.git

Merge branches 'doc.2017.04.12a', 'fixes.2017.04.19a' and 'srcu.2017.04.21a' into HEAD

doc.2017.04.12a: Documentation updates
fixes.2017.04.19a: Miscellaneous fixes
srcu.2017.04.21a: Parallelize SRCU callback handling
---

f2094107ac82bf867184efd77cee30b6a98e2e20
diff --cc Documentation/RCU/whatisRCU.txt
index 8c131a1c62ea,91c912e86915,5cbd8b2395b8..8ed6c9f6133c
--- a/Documentation/RCU/whatisRCU.txt
+++ b/Documentation/RCU/whatisRCU.txt
@@@@ -589,21 -587,20 -587,20 +589,21 @@@@ It is extremely simple
   		write_unlock(&rcu_gp_mutex);
   	}
   
 --[You can ignore rcu_assign_pointer() and rcu_dereference() without
 --missing much.  But here they are anyway.  And whatever you do, don't
 --forget about them when submitting patches making use of RCU!]
 - 
 - 	#define rcu_assign_pointer(p, v)	({ \
 - 							smp_wmb(); \
 - 							(p) = (v); \
 - 						})
 - 
 - 	#define rcu_dereference(p)     ({ \
 - 					typeof(p) _________p1 = p; \
 - 					smp_read_barrier_depends(); \
 - 					(_________p1); \
 - 					})
 ++[You can ignore rcu_assign_pointer() and rcu_dereference() without missing
 ++much.  But here are simplified versions anyway.  And whatever you do,
 ++don't forget about them when submitting patches making use of RCU!]
 + 
  -	#define rcu_assign_pointer(p, v)	({ \
  -							smp_wmb(); \
  -							(p) = (v); \
  -						})
 ++	#define rcu_assign_pointer(p, v) \
 ++	({ \
 ++		smp_store_release(&(p), (v)); \
 ++	})
 + 
  -	#define rcu_dereference(p)     ({ \
  -					typeof(p) _________p1 = p; \
  -					smp_read_barrier_depends(); \
  -					(_________p1); \
  -					})
 ++	#define rcu_dereference(p) \
 ++	({ \
 ++		typeof(p) _________p1 = p; \
 ++		smp_read_barrier_depends(); \
 ++		(_________p1); \
 ++	})
   
   
   The rcu_read_lock() and rcu_read_unlock() primitive read-acquire