From: Julia Cartwright <julia@ni.com>
To: linux-kernel@vger.kernel.org, linux-rt-users@vger.kernel.org
Cc: Thomas Gleixner <tglx@linutronix.de>,
Steven Rostedt <rostedt@goodmis.org>,
Carsten Emde <C.Emde@osadl.org>,
Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
John Kacur <jkacur@redhat.com>,
Paul Gortmaker <paul.gortmaker@windriver.com>,
Daniel Wagner <daniel.wagner@siemens.com>,
tom.zanussi@linux.intel.com
Subject: [PATCH RT 19/22] locallock: provide {get,put}_locked_ptr() variants
Date: Mon, 6 Aug 2018 04:17:35 -0500 [thread overview]
Message-ID: <2b33e3060bad998f3b93d170659ba05e4c50f4b1.1533540554.git.julia@ni.com> (raw)
In-Reply-To: <cover.1533540554.git.julia@ni.com>
4.9.115-rt94-rc1 stable review patch.
If you have any objection to the inclusion of this patch, let me know.
--- 8< --- 8< --- 8< ---
Provide a set of locallocked accessors for pointers to per-CPU data;
this is useful for dynamically-allocated per-CPU regions, for example.
These are symmetric with the {get,put}_cpu_ptr() per-CPU accessor
variants.
Signed-off-by: Julia Cartwright <julia@ni.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
(cherry picked from commit 3d45cf23db4f76cd356ebb0aa4cdaa7d92d1a64e)
Signed-off-by: Julia Cartwright <julia@ni.com>
---
include/linux/locallock.h | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/include/linux/locallock.h b/include/linux/locallock.h
index 280f884a05a3..0c3ff5b23f6a 100644
--- a/include/linux/locallock.h
+++ b/include/linux/locallock.h
@@ -238,6 +238,14 @@ static inline int __local_unlock_irqrestore(struct local_irq_lock *lv,
#define put_locked_var(lvar, var) local_unlock(lvar);
+#define get_locked_ptr(lvar, var) \
+ ({ \
+ local_lock(lvar); \
+ this_cpu_ptr(var); \
+ })
+
+#define put_locked_ptr(lvar, var) local_unlock(lvar);
+
#define local_lock_cpu(lvar) \
({ \
local_lock(lvar); \
@@ -278,6 +286,8 @@ static inline void local_irq_lock_init(int lvar) { }
#define get_locked_var(lvar, var) get_cpu_var(var)
#define put_locked_var(lvar, var) put_cpu_var(var)
+#define get_locked_ptr(lvar, var) get_cpu_ptr(var)
+#define put_locked_ptr(lvar, var) put_cpu_ptr(var)
#define local_lock_cpu(lvar) get_cpu()
#define local_unlock_cpu(lvar) put_cpu()
--
2.18.0
next prev parent reply other threads:[~2018-08-06 9:20 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-06 9:17 [PATCH RT 00/22] Linux 4.9.115-rt94-rc1 Julia Cartwright
2018-08-06 9:17 ` [PATCH RT 01/22] futex: Fix pi_state->owner serialization Julia Cartwright
2018-08-06 9:17 ` [PATCH RT 02/22] futex: Fix more put_pi_state() vs. exit_pi_state_list() races Julia Cartwright
2018-08-06 9:17 ` [PATCH RT 03/22] futex: Avoid violating the 10th rule of futex Julia Cartwright
2018-08-06 9:17 ` [PATCH RT 04/22] futex: Fix OWNER_DEAD fixup Julia Cartwright
2018-08-06 9:17 ` [PATCH RT 05/22] rtmutex: Make rt_mutex_futex_unlock() safe for irq-off callsites Julia Cartwright
2018-08-06 9:17 ` [PATCH RT 06/22] rcu: Do not include rtmutex_common.h unconditionally Julia Cartwright
2018-08-06 9:17 ` [PATCH RT 07/22] rcu: Suppress lockdep false-positive ->boost_mtx complaints Julia Cartwright
2018-08-06 9:17 ` [PATCH RT 08/22] sched, tracing: Fix trace_sched_pi_setprio() for deboosting Julia Cartwright
2018-08-06 9:17 ` [PATCH RT 09/22] crypto: limit more FPU-enabled sections Julia Cartwright
2018-08-06 9:17 ` [PATCH RT 10/22] arm*: disable NEON in kernel mode Julia Cartwright
2018-08-06 9:17 ` [PATCH RT 11/22] mm/slub: close possible memory-leak in kmem_cache_alloc_bulk() Julia Cartwright
2018-08-06 9:17 ` [PATCH RT 12/22] locking: add types.h Julia Cartwright
2018-08-06 9:17 ` [PATCH RT 13/22] net: use task_struct instead of CPU number as the queue owner on -RT Julia Cartwright
2018-08-06 9:17 ` [PATCH RT 14/22] Revert "rt,ntp: Move call to schedule_delayed_work() to helper thread" Julia Cartwright
2018-08-06 9:17 ` [PATCH RT 15/22] Revert "block: blk-mq: Use swait" Julia Cartwright
2018-08-06 9:17 ` [PATCH RT 16/22] block: blk-mq: move blk_queue_usage_counter_release() into process context Julia Cartwright
2018-08-06 9:17 ` [PATCH RT 17/22] alarmtimer: Prevent live lock in alarm_cancel() Julia Cartwright
2018-08-06 9:17 ` [PATCH RT 18/22] posix-timers: move the rcu head out of the union Julia Cartwright
2018-08-06 9:17 ` Julia Cartwright [this message]
2018-08-06 9:17 ` [PATCH RT 20/22] squashfs: make use of local lock in multi_cpu decompressor Julia Cartwright
2018-08-06 9:17 ` [PATCH RT 21/22] seqlock: provide the same ordering semantics as mainline Julia Cartwright
2018-08-06 9:17 ` [PATCH RT 22/22] Linux 4.9.115-rt94-rc1 Julia Cartwright
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