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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 09/52] rcu: Remove rsp parameter from rcu_dump_cpu_stacks() Date: Wed, 29 Aug 2018 15:38:11 -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: 18082922-0060-0000-0000-000002A66416 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: 18082922-0061-0000-0000-00004655B6A8 Message-Id: <20180829223854.4055-9-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=999 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_dump_cpu_stacks(). Signed-off-by: Paul E. McKenney --- kernel/rcu/tree.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c index 0f419554122a..2741d987e745 100644 --- a/kernel/rcu/tree.c +++ b/kernel/rcu/tree.c @@ -1269,13 +1269,13 @@ static void rcu_check_gp_kthread_starvation(void) * that don't support NMI-based stack dumps. The NMI-triggered stack * traces are more accurate because they are printed by the target CPU. */ -static void rcu_dump_cpu_stacks(struct rcu_state *rsp) +static void rcu_dump_cpu_stacks(void) { int cpu; unsigned long flags; struct rcu_node *rnp; - rcu_for_each_leaf_node(rsp, rnp) { + rcu_for_each_leaf_node(&rcu_state, rnp) { raw_spin_lock_irqsave_rcu_node(rnp, flags); for_each_leaf_node_possible_cpu(rnp, cpu) if (rnp->qsmask & leaf_node_cpu_bit(rnp, cpu)) @@ -1354,7 +1354,7 @@ static void print_other_cpu_stall(struct rcu_state *rsp, unsigned long gp_seq) smp_processor_id(), (long)(jiffies - rsp->gp_start), (long)rcu_seq_current(&rsp->gp_seq), totqlen); if (ndetected) { - rcu_dump_cpu_stacks(rsp); + rcu_dump_cpu_stacks(); /* Complain about tasks blocking the grace period. */ rcu_print_detail_task_stall(rsp); @@ -1417,7 +1417,7 @@ static void print_cpu_stall(struct rcu_state *rsp) rcu_check_gp_kthread_starvation(); - rcu_dump_cpu_stacks(rsp); + rcu_dump_cpu_stacks(); raw_spin_lock_irqsave_rcu_node(rnp, flags); /* Rewrite if needed in case of slow consoles. */ -- 2.17.1