diff options
| author | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2015-03-03 14:57:58 -0800 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2015-05-27 12:56:15 -0700 |
| commit | 7d0ae8086b828311250c6afdf800b568ac9bd693 (patch) | |
| tree | a1bb0c6a5e66f1e48c4667fd247a41c4b9253fd2 /kernel/rcu/srcu.c | |
| parent | 030bbdbf4c833bc69f502eae58498bc5572db736 (diff) | |
| download | lwn-7d0ae8086b828311250c6afdf800b568ac9bd693.tar.gz lwn-7d0ae8086b828311250c6afdf800b568ac9bd693.zip | |
rcu: Convert ACCESS_ONCE() to READ_ONCE() and WRITE_ONCE()
This commit moves from the old ACCESS_ONCE() API to the new READ_ONCE()
and WRITE_ONCE() APIs.
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
[ paulmck: Updated to include kernel/torture.c as suggested by Jason Low. ]
Diffstat (limited to 'kernel/rcu/srcu.c')
| -rw-r--r-- | kernel/rcu/srcu.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/kernel/rcu/srcu.c b/kernel/rcu/srcu.c index cad76e76b4e7..fb33d35ee0b7 100644 --- a/kernel/rcu/srcu.c +++ b/kernel/rcu/srcu.c @@ -151,7 +151,7 @@ static unsigned long srcu_readers_seq_idx(struct srcu_struct *sp, int idx) unsigned long t; for_each_possible_cpu(cpu) { - t = ACCESS_ONCE(per_cpu_ptr(sp->per_cpu_ref, cpu)->seq[idx]); + t = READ_ONCE(per_cpu_ptr(sp->per_cpu_ref, cpu)->seq[idx]); sum += t; } return sum; @@ -168,7 +168,7 @@ static unsigned long srcu_readers_active_idx(struct srcu_struct *sp, int idx) unsigned long t; for_each_possible_cpu(cpu) { - t = ACCESS_ONCE(per_cpu_ptr(sp->per_cpu_ref, cpu)->c[idx]); + t = READ_ONCE(per_cpu_ptr(sp->per_cpu_ref, cpu)->c[idx]); sum += t; } return sum; @@ -265,8 +265,8 @@ static int srcu_readers_active(struct srcu_struct *sp) unsigned long sum = 0; for_each_possible_cpu(cpu) { - sum += ACCESS_ONCE(per_cpu_ptr(sp->per_cpu_ref, cpu)->c[0]); - sum += ACCESS_ONCE(per_cpu_ptr(sp->per_cpu_ref, cpu)->c[1]); + sum += READ_ONCE(per_cpu_ptr(sp->per_cpu_ref, cpu)->c[0]); + sum += READ_ONCE(per_cpu_ptr(sp->per_cpu_ref, cpu)->c[1]); } return sum; } @@ -296,7 +296,7 @@ int __srcu_read_lock(struct srcu_struct *sp) { int idx; - idx = ACCESS_ONCE(sp->completed) & 0x1; + idx = READ_ONCE(sp->completed) & 0x1; preempt_disable(); __this_cpu_inc(sp->per_cpu_ref->c[idx]); smp_mb(); /* B */ /* Avoid leaking the critical section. */ |