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| author | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2013-08-08 22:26:23 -0700 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2013-09-23 09:16:13 -0700 |
| commit | 591c6d1710cd73824057d08eda302cf2a7cfd18a (patch) | |
| tree | dda4911c2001171f19cf09ed23ed652d43564114 /kernel/rcutree.c | |
| parent | 88d6df612cc3c99f56cc18461fcc531c3a145544 (diff) | |
| download | op-kernel-dev-591c6d1710cd73824057d08eda302cf2a7cfd18a.zip op-kernel-dev-591c6d1710cd73824057d08eda302cf2a7cfd18a.tar.gz | |
rcu: Flag lockless access to ->gp_flags with ACCESS_ONCE()
This commit applies ACCESS_ONCE() to an outside-of-lock access to
->gp_flags. Although it is hard to imagine any sane compiler messing
this particular case up, the documentation benefits are substantial.
Plus the definition of "sane compiler" grows ever looser.
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'kernel/rcutree.c')
| -rw-r--r-- | kernel/rcutree.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/rcutree.c b/kernel/rcutree.c index 62b67b7..6d028fd 100644 --- a/kernel/rcutree.c +++ b/kernel/rcutree.c @@ -1481,7 +1481,7 @@ static int __noreturn rcu_gp_kthread(void *arg) /* Handle grace-period start. */ for (;;) { wait_event_interruptible(rsp->gp_wq, - rsp->gp_flags & + ACCESS_ONCE(rsp->gp_flags) & RCU_GP_FLAG_INIT); if (rcu_gp_init(rsp)) break; |
