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| author | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2015-12-10 09:59:43 -0800 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2016-02-23 19:59:51 -0800 |
| commit | 8994515cf0030e5020d67bb837a9d9a92441d0f7 (patch) | |
| tree | 003966dcf9e6d1e07c1891624eea283a11d920d9 | |
| parent | bb53e416e02cd5406d5e1dbdd89432ff5875e982 (diff) | |
| download | linux-8994515cf0030e5020d67bb837a9d9a92441d0f7.tar.gz linux-8994515cf0030e5020d67bb837a9d9a92441d0f7.tar.bz2 linux-8994515cf0030e5020d67bb837a9d9a92441d0f7.zip | |
rcu: Update rcu_report_qs_rsp() comment
The header comment for rcu_report_qs_rsp() was obsolete, dating well
before the advent of RCU grace-period kthreads. This commit therefore
brings this comment back into alignment with current reality.
Reported-by: Lihao Liang <lihao.liang@cs.ox.ac.uk>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
| -rw-r--r-- | kernel/rcu/tree.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c index b8bbf3b27241..a91836868ade 100644 --- a/kernel/rcu/tree.c +++ b/kernel/rcu/tree.c @@ -2234,11 +2234,13 @@ static bool rcu_start_gp(struct rcu_state *rsp) } /* - * Report a full set of quiescent states to the specified rcu_state - * data structure. This involves cleaning up after the prior grace - * period and letting rcu_start_gp() start up the next grace period - * if one is needed. Note that the caller must hold rnp->lock, which - * is released before return. + * Report a full set of quiescent states to the specified rcu_state data + * structure. Invoke rcu_gp_kthread_wake() to awaken the grace-period + * kthread if another grace period is required. Whether we wake + * the grace-period kthread or it awakens itself for the next round + * of quiescent-state forcing, that kthread will clean up after the + * just-completed grace period. Note that the caller must hold rnp->lock, + * which is released before return. */ static void rcu_report_qs_rsp(struct rcu_state *rsp, unsigned long flags) __releases(rcu_get_root(rsp)->lock) |