rcu: Fix rcu_{node,data} comments about gp_seq_needed

Recent changes have removed the old ->gp_seq_needed field from the
rcu_state structure, which in turn obsoleted a couple of comments in
the rcu_node and rcu_data structures.  This commit therefore updates
these comments accordingly.

Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org>
Cc: <kernel-team@android.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.ibm.com>

diff --git a/kernel/rcu/tree.h b/kernel/rcu/tree.h
index 57a937ac51c275e0fcee9f781016366c440db46e..c3e2807a834ae4b30331d30fc7798d2db1121a6b 100644 (file)
--- a/kernel/rcu/tree.h
+++ b/kernel/rcu/tree.h
@@ -57,7 +57,7 @@ struct rcu_node {
                                        /*  some rcu_state fields as well as */
                                        /*  following. */
        unsigned long gp_seq;   /* Track rsp->rcu_gp_seq. */
-       unsigned long gp_seq_needed; /* Track rsp->rcu_gp_seq_needed. */
+       unsigned long gp_seq_needed; /* Track furthest future GP request. */
        unsigned long completedqs; /* All QSes done for this node. */
        unsigned long qsmask;   /* CPUs or groups that need to switch in */
                                /*  order for current grace period to proceed.*/
@@ -163,7 +163,7 @@ union rcu_noqs {
 struct rcu_data {
        /* 1) quiescent-state and grace-period handling : */
        unsigned long   gp_seq;         /* Track rsp->rcu_gp_seq counter. */
-       unsigned long   gp_seq_needed;  /* Track rsp->rcu_gp_seq_needed ctr. */
+       unsigned long   gp_seq_needed;  /* Track furthest future GP request. */
        union rcu_noqs  cpu_no_qs;      /* No QSes yet for this CPU. */
        bool            core_needs_qs;  /* Core waits for quiesc state. */
        bool            beenonline;     /* CPU online at least once. */