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From: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
To: linux-kernel@vger.kernel.org
Cc: mingo@kernel.org, laijs@cn.fujitsu.com, dipankar@in.ibm.com,
	akpm@linux-foundation.org, mathieu.desnoyers@efficios.com,
	josh@joshtriplett.org, niv@us.ibm.com, tglx@linutronix.de,
	peterz@infradead.org, rostedt@goodmis.org, dhowells@redhat.com,
	edumazet@google.com, dvhart@linux.intel.com, fweisbec@gmail.com,
	oleg@redhat.com, sbw@mit.edu,
	"Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Subject: [PATCH tip/core/rcu 02/17] rcu: Handle obsolete references to TINY_PREEMPT_RCU
Date: Mon,  7 Jul 2014 15:38:06 -0700	[thread overview]
Message-ID: <1404772701-8804-2-git-send-email-paulmck@linux.vnet.ibm.com> (raw)
In-Reply-To: <1404772701-8804-1-git-send-email-paulmck@linux.vnet.ibm.com>

From: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
---
 include/linux/rcupdate.h | 17 ++++++++---------
 init/Kconfig             |  2 +-
 2 files changed, 9 insertions(+), 10 deletions(-)

diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h
index c56ad15204ec..d231aa17b1d7 100644
--- a/include/linux/rcupdate.h
+++ b/include/linux/rcupdate.h
@@ -826,15 +826,14 @@ static inline void rcu_preempt_sleep_check(void)
  * read-side critical section that would block in a !PREEMPT kernel.
  * But if you want the full story, read on!
  *
- * In non-preemptible RCU implementations (TREE_RCU and TINY_RCU), it
- * is illegal to block while in an RCU read-side critical section.  In
- * preemptible RCU implementations (TREE_PREEMPT_RCU and TINY_PREEMPT_RCU)
- * in CONFIG_PREEMPT kernel builds, RCU read-side critical sections may
- * be preempted, but explicit blocking is illegal.  Finally, in preemptible
- * RCU implementations in real-time (with -rt patchset) kernel builds,
- * RCU read-side critical sections may be preempted and they may also
- * block, but only when acquiring spinlocks that are subject to priority
- * inheritance.
+ * In non-preemptible RCU implementations (TREE_RCU and TINY_RCU),
+ * it is illegal to block while in an RCU read-side critical section.
+ * In preemptible RCU implementations (TREE_PREEMPT_RCU) in CONFIG_PREEMPT
+ * kernel builds, RCU read-side critical sections may be preempted,
+ * but explicit blocking is illegal.  Finally, in preemptible RCU
+ * implementations in real-time (with -rt patchset) kernel builds, RCU
+ * read-side critical sections may be preempted and they may also block, but
+ * only when acquiring spinlocks that are subject to priority inheritance.
  */
 static inline void rcu_read_lock(void)
 {
diff --git a/init/Kconfig b/init/Kconfig
index 9d76b99af1b9..977b37806e95 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -505,7 +505,7 @@ config PREEMPT_RCU
 	def_bool TREE_PREEMPT_RCU
 	help
 	  This option enables preemptible-RCU code that is common between
-	  the TREE_PREEMPT_RCU and TINY_PREEMPT_RCU implementations.
+	  TREE_PREEMPT_RCU and, in the old days, TINY_PREEMPT_RCU.
 
 config RCU_STALL_COMMON
 	def_bool ( TREE_RCU || TREE_PREEMPT_RCU || RCU_TRACE )
-- 
1.8.1.5


  reply	other threads:[~2014-07-07 22:40 UTC|newest]

Thread overview: 54+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-07-07 22:37 [PATCH tip/core/rcu 0/17] Miscellaneous fixes for 3.17 Paul E. McKenney
2014-07-07 22:38 ` [PATCH tip/core/rcu 01/17] rcu: Document deadlock-avoidance information for rcu_read_unlock() Paul E. McKenney
2014-07-07 22:38   ` Paul E. McKenney [this message]
2014-07-07 22:38   ` [PATCH tip/core/rcu 03/17] signal: Explain local_irq_save() call Paul E. McKenney
2014-07-08  9:01     ` Lai Jiangshan
2014-07-08 15:50       ` Paul E. McKenney
2014-07-07 22:38   ` [PATCH tip/core/rcu 04/17] rcu: Make rcu node arrays static const char * const Paul E. McKenney
2014-07-07 22:38   ` [PATCH tip/core/rcu 05/17] rcu: remove redundant ACCESS_ONCE() from tick_do_timer_cpu Paul E. McKenney
2014-07-08 14:46     ` Frederic Weisbecker
2014-07-07 22:38   ` [PATCH tip/core/rcu 06/17] rcu: Eliminate read-modify-write ACCESS_ONCE() calls Paul E. McKenney
2014-07-08 16:59     ` Pranith Kumar
2014-07-08 20:35       ` Paul E. McKenney
2014-07-08 20:43         ` Pranith Kumar
2014-07-08 21:40           ` Paul E. McKenney
2014-07-07 22:38   ` [PATCH tip/core/rcu 07/17] rcu: Loosen __call_rcu()'s rcu_head alignment constraint Paul E. McKenney
2014-07-07 22:38   ` [PATCH tip/core/rcu 08/17] rcu: Allow post-unlock reference for rt_mutex Paul E. McKenney
2014-07-09  1:50     ` Lai Jiangshan
2014-07-09 16:04       ` Paul E. McKenney
2014-07-07 22:38   ` [PATCH tip/core/rcu 09/17] rcu: Check both root and current rcu_node when setting up future grace period Paul E. McKenney
2014-07-07 22:38   ` [PATCH tip/core/rcu 10/17] rcu: Simplify priority boosting by putting rt_mutex in rcu_node Paul E. McKenney
2014-07-07 22:38   ` [PATCH tip/core/rcu 11/17] rcu: Bind grace-period kthreads to non-NO_HZ_FULL CPUs Paul E. McKenney
2014-07-08 15:24     ` Frederic Weisbecker
2014-07-08 15:47       ` Paul E. McKenney
2014-07-08 18:38         ` Frederic Weisbecker
2014-07-08 19:58           ` Paul E. McKenney
2014-07-08 20:40             ` Frederic Weisbecker
2014-07-08 22:05               ` Paul E. McKenney
2014-07-09 15:40                 ` Frederic Weisbecker
2014-07-11 18:10           ` Christoph Lameter
2014-07-11 18:25             ` Frederic Weisbecker
2014-07-11 18:45               ` Paul E. McKenney
2014-07-11 18:57                 ` Frederic Weisbecker
2014-07-11 19:08                   ` Paul E. McKenney
2014-07-11 19:26                     ` Frederic Weisbecker
2014-07-11 19:43                       ` Paul E. McKenney
2014-07-11 19:55                         ` Frederic Weisbecker
2014-07-11 19:05               ` Christoph Lameter
2014-07-11 19:11                 ` Frederic Weisbecker
2014-07-11 20:35                   ` Paul E. McKenney
2014-07-11 20:45                     ` Frederic Weisbecker
2014-07-12  1:39                       ` Paul E. McKenney
2014-07-14 13:52                         ` Christoph Lameter
2014-07-11 20:15                 ` Peter Zijlstra
2014-07-14 13:53                   ` Christoph Lameter
2014-07-11 18:29             ` Paul E. McKenney
2014-07-07 22:38   ` [PATCH tip/core/rcu 12/17] rcu: Don't use NMIs to dump other CPUs' stacks Paul E. McKenney
2014-07-07 22:38   ` [PATCH tip/core/rcu 13/17] rcu: Use __this_cpu_read() instead of per_cpu_ptr() Paul E. McKenney
2014-07-07 22:38   ` [PATCH tip/core/rcu 14/17] rcu: remove CONFIG_PROVE_RCU_DELAY Paul E. McKenney
2014-07-08  8:11     ` Paul Bolle
2014-07-08 13:56       ` Paul E. McKenney
2014-07-07 22:38   ` [PATCH tip/core/rcu 15/17] rcu: Fix __rcu_reclaim() to use true/false for bool Paul E. McKenney
2014-07-07 22:38   ` [PATCH tip/core/rcu 16/17] rcu: Fix a sparse warning in rcu_initiate_boost() Paul E. McKenney
2014-07-07 22:38   ` [PATCH tip/core/rcu 17/17] rcu: Fix a sparse warning in rcu_report_unblock_qs_rnp() Paul E. McKenney
2014-07-09  2:14 ` [PATCH tip/core/rcu 0/17] Miscellaneous fixes for 3.17 Lai Jiangshan

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