diff options
| author | Pranith Kumar | 2014-11-13 20:24:14 +0100 |
|---|---|---|
| committer | Paul E. McKenney | 2015-01-06 20:01:11 +0100 |
| commit | ac59853c06993a442e8060bc19040b2ca3025aec (patch) | |
| tree | 3e4b978a2a005e85f1b59ce2754dda28f203778a /include/linux/rcupdate.h | |
| parent | compiler: Allow 1- and 2-byte smp_load_acquire() and smp_store_release() (diff) | |
| download | kernel-qcow2-linux-ac59853c06993a442e8060bc19040b2ca3025aec.tar.gz kernel-qcow2-linux-ac59853c06993a442e8060bc19040b2ca3025aec.tar.xz kernel-qcow2-linux-ac59853c06993a442e8060bc19040b2ca3025aec.zip | |
rcupdate: Replace smp_read_barrier_depends() with lockless_dereference()
Recently lockless_dereference() was added which can be used in place of
hard-coding smp_read_barrier_depends(). The following PATCH makes the change.
Signed-off-by: Pranith Kumar <bobby.prani@gmail.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'include/linux/rcupdate.h')
| -rw-r--r-- | include/linux/rcupdate.h | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h index ed4f5939a452..386ba288084a 100644 --- a/include/linux/rcupdate.h +++ b/include/linux/rcupdate.h @@ -582,11 +582,11 @@ static inline void rcu_preempt_sleep_check(void) }) #define __rcu_dereference_check(p, c, space) \ ({ \ - typeof(*p) *_________p1 = (typeof(*p) *__force)ACCESS_ONCE(p); \ + /* Dependency order vs. p above. */ \ + typeof(*p) *________p1 = (typeof(*p) *__force)lockless_dereference(p); \ rcu_lockdep_assert(c, "suspicious rcu_dereference_check() usage"); \ rcu_dereference_sparse(p, space); \ - smp_read_barrier_depends(); /* Dependency order vs. p above. */ \ - ((typeof(*p) __force __kernel *)(_________p1)); \ + ((typeof(*p) __force __kernel *)(________p1)); \ }) #define __rcu_dereference_protected(p, c, space) \ ({ \ @@ -603,10 +603,10 @@ static inline void rcu_preempt_sleep_check(void) }) #define __rcu_dereference_index_check(p, c) \ ({ \ - typeof(p) _________p1 = ACCESS_ONCE(p); \ + /* Dependency order vs. p above. */ \ + typeof(p) _________p1 = lockless_dereference(p); \ rcu_lockdep_assert(c, \ "suspicious rcu_dereference_index_check() usage"); \ - smp_read_barrier_depends(); /* Dependency order vs. p above. */ \ (_________p1); \ }) |