PREEMPT_RCU and TREE_PREEMPT_RCU serve the same function after TINY_PREEMPT_RCU has been removed. This patch removes CONFIG_PREEMPT_RCU and uses CONFIG_TREE_PREEMPT_RCU in its place.
Signed-off-by: Pranith Kumar <bobby.pr...@gmail.com> --- arch/xtensa/configs/s6105_defconfig | 2 +- include/linux/init_task.h | 2 +- include/linux/rcupdate.h | 16 ++++++++-------- include/linux/sched.h | 10 +++++----- init/Kconfig | 6 ------ kernel/rcu/update.c | 4 ++-- tools/testing/selftests/rcutorture/doc/TINY_RCU.txt | 2 +- .../selftests/rcutorture/doc/TREE_RCU-kconfig.txt | 2 +- 8 files changed, 19 insertions(+), 25 deletions(-) diff --git a/arch/xtensa/configs/s6105_defconfig b/arch/xtensa/configs/s6105_defconfig index 12a492a..dab1a99 100644 --- a/arch/xtensa/configs/s6105_defconfig +++ b/arch/xtensa/configs/s6105_defconfig @@ -35,7 +35,7 @@ CONFIG_SYSVIPC_SYSCTL=y # # CONFIG_CLASSIC_RCU is not set # CONFIG_TREE_RCU is not set -CONFIG_PREEMPT_RCU=y +CONFIG_TREE_PREEMPT_RCU=y # CONFIG_RCU_TRACE is not set # CONFIG_TREE_RCU_TRACE is not set # CONFIG_PREEMPT_RCU_TRACE is not set diff --git a/include/linux/init_task.h b/include/linux/init_task.h index 77fc43f..39600f4 100644 --- a/include/linux/init_task.h +++ b/include/linux/init_task.h @@ -108,7 +108,7 @@ extern struct group_info init_groups; #else #define INIT_TASK_RCU_TREE_PREEMPT(tsk) #endif -#ifdef CONFIG_PREEMPT_RCU +#ifdef CONFIG_TREE_PREEMPT_RCU #define INIT_TASK_RCU_PREEMPT(tsk) \ .rcu_read_lock_nesting = 0, \ .rcu_read_unlock_special.s = 0, \ diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h index a4a819f..17a15d5 100644 --- a/include/linux/rcupdate.h +++ b/include/linux/rcupdate.h @@ -103,7 +103,7 @@ void do_trace_rcu_torture_read(const char *rcutorturename, /* Exported common interfaces */ -#ifdef CONFIG_PREEMPT_RCU +#ifdef CONFIG_TREE_PREEMPT_RCU /** * call_rcu() - Queue an RCU callback for invocation after a grace period. @@ -140,12 +140,12 @@ void do_trace_rcu_torture_read(const char *rcutorturename, void call_rcu(struct rcu_head *head, void (*func)(struct rcu_head *head)); -#else /* #ifdef CONFIG_PREEMPT_RCU */ +#else /* #ifdef CONFIG_TREE_PREEMPT_RCU */ /* In classic RCU, call_rcu() is just call_rcu_sched(). */ #define call_rcu call_rcu_sched -#endif /* #else #ifdef CONFIG_PREEMPT_RCU */ +#endif /* #else #ifdef CONFIG_TREE_PREEMPT_RCU */ /** * call_rcu_bh() - Queue an RCU for invocation after a quicker grace period. @@ -217,7 +217,7 @@ void call_rcu_tasks(struct rcu_head *head, void (*func)(struct rcu_head *head)); void synchronize_rcu_tasks(void); void rcu_barrier_tasks(void); -#ifdef CONFIG_PREEMPT_RCU +#ifdef CONFIG_TREE_PREEMPT_RCU void __rcu_read_lock(void); void __rcu_read_unlock(void); @@ -227,12 +227,12 @@ void synchronize_rcu(void); /* * Defined as a macro as it is a very low level header included from * areas that don't even know about current. This gives the rcu_read_lock() - * nesting depth, but makes sense only if CONFIG_PREEMPT_RCU -- in other + * nesting depth, but makes sense only if CONFIG_TREE_PREEMPT_RCU -- in other * types of kernel builds, the rcu_read_lock() nesting depth is unknowable. */ #define rcu_preempt_depth() (current->rcu_read_lock_nesting) -#else /* #ifdef CONFIG_PREEMPT_RCU */ +#else /* #ifdef CONFIG_TREE_PREEMPT_RCU */ static inline void __rcu_read_lock(void) { @@ -254,7 +254,7 @@ static inline int rcu_preempt_depth(void) return 0; } -#endif /* #else #ifdef CONFIG_PREEMPT_RCU */ +#endif /* #else #ifdef CONFIG_TREE_PREEMPT_RCU */ /* Internal to kernel */ void rcu_init(void); @@ -530,7 +530,7 @@ static inline int rcu_read_lock_sched_held(void) } \ } while (0) -#if defined(CONFIG_PROVE_RCU) && !defined(CONFIG_PREEMPT_RCU) +#if defined(CONFIG_PROVE_RCU) && !defined(CONFIG_TREE_PREEMPT_RCU) static inline void rcu_preempt_sleep_check(void) { rcu_lockdep_assert(!lock_is_held(&rcu_lock_map), diff --git a/include/linux/sched.h b/include/linux/sched.h index 42888d7..6acaa30 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -1269,11 +1269,11 @@ struct task_struct { int nr_cpus_allowed; cpumask_t cpus_allowed; -#ifdef CONFIG_PREEMPT_RCU +#ifdef CONFIG_TREE_PREEMPT_RCU int rcu_read_lock_nesting; union rcu_special rcu_read_unlock_special; struct list_head rcu_node_entry; -#endif /* #ifdef CONFIG_PREEMPT_RCU */ +#endif /* #ifdef CONFIG_TREE_PREEMPT_RCU */ #ifdef CONFIG_TREE_PREEMPT_RCU struct rcu_node *rcu_blocked_node; #endif /* #ifdef CONFIG_TREE_PREEMPT_RCU */ @@ -2014,12 +2014,12 @@ extern void task_clear_jobctl_pending(struct task_struct *task, static inline void rcu_copy_process(struct task_struct *p) { -#ifdef CONFIG_PREEMPT_RCU +#ifdef CONFIG_TREE_PREEMPT_RCU p->rcu_read_lock_nesting = 0; p->rcu_read_unlock_special.s = 0; p->rcu_blocked_node = NULL; INIT_LIST_HEAD(&p->rcu_node_entry); -#endif /* #ifdef CONFIG_PREEMPT_RCU */ +#endif /* #ifdef CONFIG_TREE_PREEMPT_RCU */ #ifdef CONFIG_TASKS_RCU p->rcu_tasks_holdout = false; INIT_LIST_HEAD(&p->rcu_tasks_holdout_list); @@ -2752,7 +2752,7 @@ extern int __cond_resched_softirq(void); static inline void cond_resched_rcu(void) { -#if defined(CONFIG_DEBUG_ATOMIC_SLEEP) || !defined(CONFIG_PREEMPT_RCU) +#if defined(CONFIG_DEBUG_ATOMIC_SLEEP) || !defined(CONFIG_TREE_PREEMPT_RCU) rcu_read_unlock(); cond_resched(); rcu_read_lock(); diff --git a/init/Kconfig b/init/Kconfig index 8a2b97c..27ad03c 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -501,12 +501,6 @@ config TINY_RCU endchoice -config PREEMPT_RCU - def_bool TREE_PREEMPT_RCU - help - This option enables preemptible-RCU code that is common between - TREE_PREEMPT_RCU and, in the old days, TINY_PREEMPT_RCU. - config TASKS_RCU bool "Task_based RCU implementation using voluntary context switch" default n diff --git a/kernel/rcu/update.c b/kernel/rcu/update.c index 3ef8ba5..8848a32 100644 --- a/kernel/rcu/update.c +++ b/kernel/rcu/update.c @@ -62,7 +62,7 @@ MODULE_ALIAS("rcupdate"); module_param(rcu_expedited, int, 0); -#ifdef CONFIG_PREEMPT_RCU +#ifdef CONFIG_TREE_PREEMPT_RCU /* * Preemptible RCU implementation for rcu_read_lock(). @@ -108,7 +108,7 @@ void __rcu_read_unlock(void) } EXPORT_SYMBOL_GPL(__rcu_read_unlock); -#endif /* #ifdef CONFIG_PREEMPT_RCU */ +#endif /* #ifdef CONFIG_TREE_PREEMPT_RCU */ #ifdef CONFIG_DEBUG_LOCK_ALLOC static struct lock_class_key rcu_lock_key; diff --git a/tools/testing/selftests/rcutorture/doc/TINY_RCU.txt b/tools/testing/selftests/rcutorture/doc/TINY_RCU.txt index 28db67b..4fea92d 100644 --- a/tools/testing/selftests/rcutorture/doc/TINY_RCU.txt +++ b/tools/testing/selftests/rcutorture/doc/TINY_RCU.txt @@ -31,7 +31,7 @@ CONFIG_RCU_TORTURE_TEST CONFIG_HOTPLUG_CPU CONFIG_PREEMPT -CONFIG_PREEMPT_RCU +CONFIG_TREE_PREEMPT_RCU CONFIG_SMP CONFIG_TINY_RCU CONFIG_TREE_PREEMPT_RCU diff --git a/tools/testing/selftests/rcutorture/doc/TREE_RCU-kconfig.txt b/tools/testing/selftests/rcutorture/doc/TREE_RCU-kconfig.txt index f85c45e..081dece 100644 --- a/tools/testing/selftests/rcutorture/doc/TREE_RCU-kconfig.txt +++ b/tools/testing/selftests/rcutorture/doc/TREE_RCU-kconfig.txt @@ -62,7 +62,7 @@ CONFIG_NO_HZ_FULL_SYSIDLE_SMALL Defer until Frederic uses this. CONFIG_PREEMPT_COUNT -CONFIG_PREEMPT_RCU +CONFIG_TREE_PREEMPT_RCU Redundant with CONFIG_PREEMPT, ignore. -- 2.1.0 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/