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srcu: Document that srcu_funnel_gp_start() implies srcu_funnel_exp_start()

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This commit updates the header comment of srcu_funnel_gp_start() to
document the fact that srcu_funnel_gp_start() does the work of
srcu_funnel_exp_start(), in some cases by invoking it directly.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
This commit is contained in:
Paul E. McKenney 2018-04-25 12:03:36 -07:00
parent 5ef98a6328
commit 17294ce6a4
1 changed files with 3 additions and 0 deletions
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3
kernel/rcu/srcutree.c
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@ -641,6 +641,9 @@ static void srcu_funnel_exp_start(struct srcu_struct *sp, struct srcu_node *snp,
* period s. Losers must either ensure that their desired grace-period * period s. Losers must either ensure that their desired grace-period
* number is recorded on at least their leaf srcu_node structure, or they * number is recorded on at least their leaf srcu_node structure, or they
* must take steps to invoke their own callbacks. * must take steps to invoke their own callbacks.
*
* Note that this function also does the work of srcu_funnel_exp_start(),
* in some cases by directly invoking it.
*/ */
static void srcu_funnel_gp_start(struct srcu_struct *sp, struct srcu_data *sdp, static void srcu_funnel_gp_start(struct srcu_struct *sp, struct srcu_data *sdp,
unsigned long s, bool do_norm) unsigned long s, bool do_norm)