diff options
| author | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2013-08-08 22:26:23 -0700 |
|---|---|---|
| committer | Mister Oyster <oysterized@gmail.com> | 2017-04-11 10:59:12 +0200 |
| commit | 77c4cfba6f86a201a0196fa526966c6602f2fd9e (patch) | |
| tree | 2a38913528f4c5e23712f90c3ca7ce2852228189 | |
| parent | dbba0573bd99e25e8e9894cad932e3525abcca1d (diff) | |
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>
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
Git-commit: 591c6d1710cd73824057d08eda302cf2a7cfd18a
[kishank@codeaurora.org resolve trivial conflicts]
Signed-off-by: Kishan Kumar <kishank@codeaurora.org>
| -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 64eeb75fa..6e8e6eced 100644 --- a/kernel/rcutree.c +++ b/kernel/rcutree.c @@ -1530,7 +1530,7 @@ 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 ((rsp->gp_flags & RCU_GP_FLAG_INIT) && rcu_gp_init(rsp)) |