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| author | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2015-02-18 12:24:30 -0800 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2015-02-26 12:02:59 -0800 |
| commit | 0d39482c3db13aae1db143d340816108dd53e443 (patch) | |
| tree | dbcf5c785244bd29da2190d65a92fb1ca497a009 /include/linux/rcupdate.h | |
| parent | c517d838eb7d07bbe9507871fab3931deccff539 (diff) | |
| download | linux-stable-0d39482c3db13aae1db143d340816108dd53e443.tar.gz linux-stable-0d39482c3db13aae1db143d340816108dd53e443.tar.bz2 linux-stable-0d39482c3db13aae1db143d340816108dd53e443.zip | |
rcu: Provide rcu_expedite_gp() and rcu_unexpedite_gp()
Currently, expediting of normal synchronous grace-period primitives
(synchronize_rcu() and friends) is controlled by the rcu_expedited()
boot/sysfs parameter. This works well, but does not handle nesting.
This commit therefore provides rcu_expedite_gp() to enable expediting
and rcu_unexpedite_gp() to cancel a prior rcu_expedite_gp(), both of
which support nesting.
Reported-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'include/linux/rcupdate.h')
| -rw-r--r-- | include/linux/rcupdate.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h index 78097491cd99..57a4d1f73a00 100644 --- a/include/linux/rcupdate.h +++ b/include/linux/rcupdate.h @@ -48,6 +48,26 @@ extern int rcu_expedited; /* for sysctl */ +#ifdef CONFIG_TINY_RCU +/* Tiny RCU doesn't expedite, as its purpose in life is instead to be tiny. */ +static inline bool rcu_gp_is_expedited(void) /* Internal RCU use. */ +{ + return false; +} + +static inline void rcu_expedite_gp(void) +{ +} + +static inline void rcu_unexpedite_gp(void) +{ +} +#else /* #ifdef CONFIG_TINY_RCU */ +bool rcu_gp_is_expedited(void); /* Internal RCU use. */ +void rcu_expedite_gp(void); +void rcu_unexpedite_gp(void); +#endif /* #else #ifdef CONFIG_TINY_RCU */ + enum rcutorture_type { RCU_FLAVOR, RCU_BH_FLAVOR, |