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| author | Jiri Kosina <jkosina@suse.cz> | 2016-04-18 11:18:55 +0200 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2016-04-18 11:18:55 +0200 |
| commit | 9938b04472d5c59f8bd8152a548533a8599596a2 (patch) | |
| tree | 0fc8318100878c5e446076613ec02a97aa179119 /kernel/rcu/update.c | |
| parent | bd7ced98812dbb906950d8b0ec786f14f631cede (diff) | |
| parent | c3b46c73264b03000d1e18b22f5caf63332547c9 (diff) | |
| download | linux-9938b04472d5c59f8bd8152a548533a8599596a2.tar.gz | |
Merge branch 'master' into for-next
Sync with Linus' tree so that patches against newer codebase can be applied.
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'kernel/rcu/update.c')
| -rw-r--r-- | kernel/rcu/update.c | 23 |
1 files changed, 21 insertions, 2 deletions
diff --git a/kernel/rcu/update.c b/kernel/rcu/update.c index 5f748c5a40f0..ca828b41c938 100644 --- a/kernel/rcu/update.c +++ b/kernel/rcu/update.c @@ -60,7 +60,12 @@ MODULE_ALIAS("rcupdate"); #endif #define MODULE_PARAM_PREFIX "rcupdate." +#ifndef CONFIG_TINY_RCU module_param(rcu_expedited, int, 0); +module_param(rcu_normal, int, 0); +static int rcu_normal_after_boot; +module_param(rcu_normal_after_boot, int, 0); +#endif /* #ifndef CONFIG_TINY_RCU */ #if defined(CONFIG_DEBUG_LOCK_ALLOC) && defined(CONFIG_PREEMPT_COUNT) /** @@ -113,6 +118,18 @@ EXPORT_SYMBOL(rcu_read_lock_sched_held); #ifndef CONFIG_TINY_RCU +/* + * Should expedited grace-period primitives always fall back to their + * non-expedited counterparts? Intended for use within RCU. Note + * that if the user specifies both rcu_expedited and rcu_normal, then + * rcu_normal wins. + */ +bool rcu_gp_is_normal(void) +{ + return READ_ONCE(rcu_normal); +} +EXPORT_SYMBOL_GPL(rcu_gp_is_normal); + static atomic_t rcu_expedited_nesting = ATOMIC_INIT(IS_ENABLED(CONFIG_RCU_EXPEDITE_BOOT) ? 1 : 0); @@ -157,8 +174,6 @@ void rcu_unexpedite_gp(void) } EXPORT_SYMBOL_GPL(rcu_unexpedite_gp); -#endif /* #ifndef CONFIG_TINY_RCU */ - /* * Inform RCU of the end of the in-kernel boot sequence. */ @@ -166,8 +181,12 @@ void rcu_end_inkernel_boot(void) { if (IS_ENABLED(CONFIG_RCU_EXPEDITE_BOOT)) rcu_unexpedite_gp(); + if (rcu_normal_after_boot) + WRITE_ONCE(rcu_normal, 1); } +#endif /* #ifndef CONFIG_TINY_RCU */ + #ifdef CONFIG_PREEMPT_RCU /* |