From: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
To: Yury Norov <ynorov@caviumnetworks.com>
Cc: Chris Metcalf <cmetcalf@mellanox.com>,
Christopher Lameter <cl@linux.com>,
Russell King - ARM Linux <linux@armlinux.org.uk>,
Mark Rutland <mark.rutland@arm.com>,
Steven Rostedt <rostedt@goodmis.org>,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will.deacon@arm.com>,
Pekka Enberg <penberg@kernel.org>,
David Rientjes <rientjes@google.com>,
Joonsoo Kim <iamjoonsoo.kim@lge.com>,
Andrew Morton <akpm@linux-foundation.org>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Paul Mackerras <paulus@samba.org>,
Michael Ellerman <mpe@ellerman.id.au>,
linux-arm-kernel@lists.infradead.org,
linuxppc-dev@lists.ozlabs.org, kvm-ppc@vger.kernel.org,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/2] rcu: declare rcu_eqs_special_set() in public header
Date: Sun, 25 Mar 2018 12:12:43 -0700 [thread overview]
Message-ID: <20180325191243.GH3675@linux.vnet.ibm.com> (raw)
In-Reply-To: <20180325175004.28162-2-ynorov@caviumnetworks.com>
On Sun, Mar 25, 2018 at 08:50:03PM +0300, Yury Norov wrote:
> rcu_eqs_special_set() is declared only in internal header
> kernel/rcu/tree.h and stubbed in include/linux/rcutiny.h.
>
> This patch declares rcu_eqs_special_set() in include/linux/rcutree.h, so
> it can be used in non-rcu kernel code.
>
> Signed-off-by: Yury Norov <ynorov@caviumnetworks.com>
> ---
> include/linux/rcutree.h | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/include/linux/rcutree.h b/include/linux/rcutree.h
> index fd996cdf1833..448f20f27396 100644
> --- a/include/linux/rcutree.h
> +++ b/include/linux/rcutree.h
> @@ -74,6 +74,7 @@ static inline void synchronize_rcu_bh_expedited(void)
> void rcu_barrier(void);
> void rcu_barrier_bh(void);
> void rcu_barrier_sched(void);
> +bool rcu_eqs_special_set(int cpu);
> unsigned long get_state_synchronize_rcu(void);
> void cond_synchronize_rcu(unsigned long oldstate);
> unsigned long get_state_synchronize_sched(void);
Good point, a bit hard to use otherwise. ;-)
I removed the declaration from rcutree.h and updated the commit log as
follows. Does it look OK?
Thanx, Paul
------------------------------------------------------------------------
commit 4497105b718a819072d48a675916d9d200b5327f
Author: Yury Norov <ynorov@caviumnetworks.com>
Date: Sun Mar 25 20:50:03 2018 +0300
rcu: Declare rcu_eqs_special_set() in public header
Because rcu_eqs_special_set() is declared only in internal header
kernel/rcu/tree.h and stubbed in include/linux/rcutiny.h, it is
inaccessible outside of the RCU implementation. This patch therefore
moves the rcu_eqs_special_set() declaration to include/linux/rcutree.h,
which allows it to be used in non-rcu kernel code.
Signed-off-by: Yury Norov <ynorov@caviumnetworks.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
diff --git a/include/linux/rcutree.h b/include/linux/rcutree.h
index fd996cdf1833..448f20f27396 100644
--- a/include/linux/rcutree.h
+++ b/include/linux/rcutree.h
@@ -74,6 +74,7 @@ static inline void synchronize_rcu_bh_expedited(void)
void rcu_barrier(void);
void rcu_barrier_bh(void);
void rcu_barrier_sched(void);
+bool rcu_eqs_special_set(int cpu);
unsigned long get_state_synchronize_rcu(void);
void cond_synchronize_rcu(unsigned long oldstate);
unsigned long get_state_synchronize_sched(void);
diff --git a/kernel/rcu/tree.h b/kernel/rcu/tree.h
index 59ad0e23c722..d5f617aaa744 100644
--- a/kernel/rcu/tree.h
+++ b/kernel/rcu/tree.h
@@ -415,7 +415,6 @@ extern struct rcu_state rcu_preempt_state;
#endif /* #ifdef CONFIG_PREEMPT_RCU */
int rcu_dynticks_snap(struct rcu_dynticks *rdtp);
-bool rcu_eqs_special_set(int cpu);
#ifdef CONFIG_RCU_BOOST
DECLARE_PER_CPU(unsigned int, rcu_cpu_kthread_status);
next prev parent reply other threads:[~2018-03-25 19:12 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-25 17:50 [PATCH 0/2] smp: don't kick CPUs running idle or nohz_full tasks Yury Norov
2018-03-25 17:50 ` [PATCH 1/2] rcu: declare rcu_eqs_special_set() in public header Yury Norov
2018-03-25 19:12 ` Paul E. McKenney [this message]
2018-03-25 19:18 ` Yury Norov
2018-03-25 17:50 ` [PATCH 2/2] smp: introduce kick_active_cpus_sync() Yury Norov
2018-03-25 19:23 ` Paul E. McKenney
2018-03-25 20:11 ` Yury Norov
2018-03-26 12:45 ` Paul E. McKenney
2018-03-28 13:36 ` Yury Norov
2018-03-28 13:56 ` Paul E. McKenney
2018-03-28 14:41 ` Yury Norov
2018-03-28 14:45 ` Paul E. McKenney
2018-03-26 8:53 ` Andrea Parri
2018-03-26 18:57 ` Steven Rostedt
2018-03-28 12:59 ` Yury Norov
2018-03-27 10:21 ` Will Deacon
2018-03-28 10:58 ` Yury Norov
2018-04-01 11:11 ` Yury Norov
2018-04-01 14:10 ` Paul E. McKenney
2018-04-03 13:48 ` Mark Rutland
2018-04-04 3:36 ` Yury Norov
2018-04-04 9:08 ` Mark Rutland
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