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McKenney" To: linux-kernel@vger.kernel.org Cc: mingo@kernel.org, jiangshanlai@gmail.com, dipankar@in.ibm.com, akpm@linux-foundation.org, mathieu.desnoyers@efficios.com, josh@joshtriplett.org, tglx@linutronix.de, peterz@infradead.org, rostedt@goodmis.org, dhowells@redhat.com, edumazet@google.com, fweisbec@gmail.com, oleg@redhat.com, joel@joelfernandes.org, "Paul E. McKenney" Subject: [PATCH tip/core/rcu 01/52] rcu: Remove rsp parameter from rcu_report_qs_rnp() Date: Wed, 29 Aug 2018 15:38:03 -0700 X-Mailer: git-send-email 2.17.1 In-Reply-To: <20180829223830.GA1800@linux.vnet.ibm.com> References: <20180829223830.GA1800@linux.vnet.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 18082922-0060-0000-0000-000002A66415 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00009636; HX=3.00000242; KW=3.00000007; PH=3.00000004; SC=3.00000266; SDB=6.01080744; UDB=6.00557498; IPR=6.00860730; MB=3.00023002; MTD=3.00000008; XFM=3.00000015; UTC=2018-08-29 22:39:00 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18082922-0061-0000-0000-00004655B6A6 Message-Id: <20180829223854.4055-1-paulmck@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-08-29_06:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=1 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=878 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1807170000 definitions=main-1808290220 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org There now is only one rcu_state structure in a given build of the Linux kernel, so there is no need to pass it as a parameter to RCU's functions. This commit therefore removes the rsp parameter from rcu_report_qs_rnp(). Signed-off-by: Paul E. McKenney --- kernel/rcu/tree.c | 23 +++++++++++------------ 1 file changed, 11 insertions(+), 12 deletions(-) diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c index f0e7e3972fd9..c9f4d7f3de91 100644 --- a/kernel/rcu/tree.c +++ b/kernel/rcu/tree.c @@ -132,9 +132,8 @@ EXPORT_SYMBOL_GPL(rcu_scheduler_active); */ static int rcu_scheduler_fully_active __read_mostly; -static void -rcu_report_qs_rnp(unsigned long mask, struct rcu_state *rsp, - struct rcu_node *rnp, unsigned long gps, unsigned long flags); +static void rcu_report_qs_rnp(unsigned long mask, struct rcu_node *rnp, + unsigned long gps, unsigned long flags); static void rcu_init_new_rnp(struct rcu_node *rnp_leaf); static void rcu_cleanup_dead_rnp(struct rcu_node *rnp_leaf); static void rcu_boost_kthread_setaffinity(struct rcu_node *rnp, int outgoingcpu); @@ -1946,7 +1945,7 @@ static bool rcu_gp_init(struct rcu_state *rsp) mask = rnp->qsmask & ~rnp->qsmaskinitnext; rnp->rcu_gp_init_mask = mask; if ((mask || rnp->wait_blkd_tasks) && rcu_is_leaf_node(rnp)) - rcu_report_qs_rnp(mask, rsp, rnp, rnp->gp_seq, flags); + rcu_report_qs_rnp(mask, rnp, rnp->gp_seq, flags); else raw_spin_unlock_irq_rcu_node(rnp); cond_resched_tasks_rcu_qs(); @@ -2213,13 +2212,13 @@ static void rcu_report_qs_rsp(struct rcu_state *rsp, unsigned long flags) * disabled. This allows propagating quiescent state due to resumed tasks * during grace-period initialization. */ -static void -rcu_report_qs_rnp(unsigned long mask, struct rcu_state *rsp, - struct rcu_node *rnp, unsigned long gps, unsigned long flags) +static void rcu_report_qs_rnp(unsigned long mask, struct rcu_node *rnp, + unsigned long gps, unsigned long flags) __releases(rnp->lock) { unsigned long oldmask = 0; struct rcu_node *rnp_c; + struct rcu_state __maybe_unused *rsp = &rcu_state; raw_lockdep_assert_held_rcu_node(rnp); @@ -2311,7 +2310,7 @@ rcu_report_unblock_qs_rnp(struct rcu_state *rsp, mask = rnp->grpmask; raw_spin_unlock_rcu_node(rnp); /* irqs remain disabled. */ raw_spin_lock_rcu_node(rnp_p); /* irqs already disabled. */ - rcu_report_qs_rnp(mask, rsp, rnp_p, gps, flags); + rcu_report_qs_rnp(mask, rnp_p, gps, flags); } /* @@ -2354,7 +2353,7 @@ rcu_report_qs_rdp(int cpu, struct rcu_state *rsp, struct rcu_data *rdp) */ needwake = rcu_accelerate_cbs(rsp, rnp, rdp); - rcu_report_qs_rnp(mask, rsp, rnp, rnp->gp_seq, flags); + rcu_report_qs_rnp(mask, rnp, rnp->gp_seq, flags); /* ^^^ Released rnp->lock */ if (needwake) rcu_gp_kthread_wake(rsp); @@ -2622,7 +2621,7 @@ static void force_qs_rnp(struct rcu_state *rsp, int (*f)(struct rcu_data *rsp)) } if (mask != 0) { /* Idle/offline CPUs, report (releases rnp->lock). */ - rcu_report_qs_rnp(mask, rsp, rnp, rnp->gp_seq, flags); + rcu_report_qs_rnp(mask, rnp, rnp->gp_seq, flags); } else { /* Nothing to do here, so just drop the lock. */ raw_spin_unlock_irqrestore_rcu_node(rnp, flags); @@ -3576,7 +3575,7 @@ void rcu_cpu_starting(unsigned int cpu) rdp->rcu_onl_gp_flags = READ_ONCE(rsp->gp_flags); if (rnp->qsmask & mask) { /* RCU waiting on incoming CPU? */ /* Report QS -after- changing ->qsmaskinitnext! */ - rcu_report_qs_rnp(mask, rsp, rnp, rnp->gp_seq, flags); + rcu_report_qs_rnp(mask, rnp, rnp->gp_seq, flags); } else { raw_spin_unlock_irqrestore_rcu_node(rnp, flags); } @@ -3605,7 +3604,7 @@ static void rcu_cleanup_dying_idle_cpu(int cpu, struct rcu_state *rsp) rdp->rcu_ofl_gp_flags = READ_ONCE(rsp->gp_flags); if (rnp->qsmask & mask) { /* RCU waiting on outgoing CPU? */ /* Report quiescent state -before- changing ->qsmaskinitnext! */ - rcu_report_qs_rnp(mask, rsp, rnp, rnp->gp_seq, flags); + rcu_report_qs_rnp(mask, rnp, rnp->gp_seq, flags); raw_spin_lock_irqsave_rcu_node(rnp, flags); } rnp->qsmaskinitnext &= ~mask; -- 2.17.1