diff options
Diffstat (limited to 'kernel/rcu/srcutree.c')
| -rw-r--r-- | kernel/rcu/srcutree.c | 39 |
1 files changed, 35 insertions, 4 deletions
diff --git a/kernel/rcu/srcutree.c b/kernel/rcu/srcutree.c index 2f8aa280911e..ea3f128de06f 100644 --- a/kernel/rcu/srcutree.c +++ b/kernel/rcu/srcutree.c @@ -309,13 +309,24 @@ int __init_srcu_struct_fast(struct srcu_struct *ssp, const char *name, struct lo } EXPORT_SYMBOL_GPL(__init_srcu_struct_fast); +int __init_srcu_struct_fast_updown(struct srcu_struct *ssp, const char *name, + struct lock_class_key *key) +{ + ssp->srcu_reader_flavor = SRCU_READ_FLAVOR_FAST_UPDOWN; + return __init_srcu_struct_common(ssp, name, key); +} +EXPORT_SYMBOL_GPL(__init_srcu_struct_fast_updown); + #else /* #ifdef CONFIG_DEBUG_LOCK_ALLOC */ /** * init_srcu_struct - initialize a sleep-RCU structure * @ssp: structure to initialize. * - * Must invoke this on a given srcu_struct before passing that srcu_struct + * Use this in place of DEFINE_SRCU() and DEFINE_STATIC_SRCU() + * for non-static srcu_struct structures that are to be passed to + * srcu_read_lock(), srcu_read_lock_nmisafe(), and friends. It is necessary + * to invoke this on a given srcu_struct before passing that srcu_struct * to any other function. Each srcu_struct represents a separate domain * of SRCU protection. */ @@ -330,9 +341,11 @@ EXPORT_SYMBOL_GPL(init_srcu_struct); * init_srcu_struct_fast - initialize a fast-reader sleep-RCU structure * @ssp: structure to initialize. * - * Must invoke this on a given srcu_struct before passing that srcu_struct - * to any other function. Each srcu_struct represents a separate domain - * of SRCU protection. + * Use this in place of DEFINE_SRCU_FAST() and DEFINE_STATIC_SRCU_FAST() + * for non-static srcu_struct structures that are to be passed to + * srcu_read_lock_fast() and friends. It is necessary to invoke this on a + * given srcu_struct before passing that srcu_struct to any other function. + * Each srcu_struct represents a separate domain of SRCU protection. */ int init_srcu_struct_fast(struct srcu_struct *ssp) { @@ -341,6 +354,24 @@ int init_srcu_struct_fast(struct srcu_struct *ssp) } EXPORT_SYMBOL_GPL(init_srcu_struct_fast); +/** + * init_srcu_struct_fast_updown - initialize a fast-reader up/down sleep-RCU structure + * @ssp: structure to initialize. + * + * Use this function in place of DEFINE_SRCU_FAST_UPDOWN() and + * DEFINE_STATIC_SRCU_FAST_UPDOWN() for non-static srcu_struct + * structures that are to be passed to srcu_read_lock_fast_updown(), + * srcu_down_read_fast(), and friends. It is necessary to invoke this on a + * given srcu_struct before passing that srcu_struct to any other function. + * Each srcu_struct represents a separate domain of SRCU protection. + */ +int init_srcu_struct_fast_updown(struct srcu_struct *ssp) +{ + ssp->srcu_reader_flavor = SRCU_READ_FLAVOR_FAST_UPDOWN; + return init_srcu_struct_fields(ssp, false); +} +EXPORT_SYMBOL_GPL(init_srcu_struct_fast_updown); + #endif /* #else #ifdef CONFIG_DEBUG_LOCK_ALLOC */ /* |