diff options
| author | Paul E. McKenney <paulmck@linux.ibm.com> | 2018-11-07 06:17:01 +0300 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.ibm.com> | 2018-11-27 20:21:43 +0300 |
| commit | cb2f55369d3a9e6cf5c34d2da39eb242279a582d (patch) | |
| tree | 562c99382598ad7d2029601df7ee8a924500f8ea /kernel/module.c | |
| parent | c9a863bbb1620dca3af57934cdbb002e852449fc (diff) | |
| download | linux-cb2f55369d3a9e6cf5c34d2da39eb242279a582d.tar.xz | |
modules: Replace synchronize_sched() and call_rcu_sched()
Now that synchronize_rcu() waits for preempt-disable regions of code
as well as RCU read-side critical sections, synchronize_sched() can
be replaced by synchronize_rcu(). Similarly, call_rcu_sched() can be
replaced by call_rcu(). This commit therefore makes these changes.
Signed-off-by: Paul E. McKenney <paulmck@linux.ibm.com>
Acked-by: Jessica Yu <jeyu@kernel.org>
Diffstat (limited to 'kernel/module.c')
| -rw-r--r-- | kernel/module.c | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/kernel/module.c b/kernel/module.c index 49a405891587..99b46c32d579 100644 --- a/kernel/module.c +++ b/kernel/module.c @@ -2159,7 +2159,7 @@ static void free_module(struct module *mod) /* Remove this module from bug list, this uses list_del_rcu */ module_bug_cleanup(mod); /* Wait for RCU-sched synchronizing before releasing mod->list and buglist. */ - synchronize_sched(); + synchronize_rcu(); mutex_unlock(&module_mutex); /* This may be empty, but that's OK */ @@ -3507,15 +3507,15 @@ static noinline int do_init_module(struct module *mod) /* * We want to free module_init, but be aware that kallsyms may be * walking this with preempt disabled. In all the failure paths, we - * call synchronize_sched(), but we don't want to slow down the success + * call synchronize_rcu(), but we don't want to slow down the success * path, so use actual RCU here. * Note that module_alloc() on most architectures creates W+X page * mappings which won't be cleaned up until do_free_init() runs. Any * code such as mark_rodata_ro() which depends on those mappings to * be cleaned up needs to sync with the queued work - ie - * rcu_barrier_sched() + * rcu_barrier() */ - call_rcu_sched(&freeinit->rcu, do_free_init); + call_rcu(&freeinit->rcu, do_free_init); mutex_unlock(&module_mutex); wake_up_all(&module_wq); @@ -3526,7 +3526,7 @@ fail_free_freeinit: fail: /* Try to protect us from buggy refcounters. */ mod->state = MODULE_STATE_GOING; - synchronize_sched(); + synchronize_rcu(); module_put(mod); blocking_notifier_call_chain(&module_notify_list, MODULE_STATE_GOING, mod); @@ -3819,7 +3819,7 @@ static int load_module(struct load_info *info, const char __user *uargs, ddebug_cleanup: ftrace_release_mod(mod); dynamic_debug_remove(mod, info->debug); - synchronize_sched(); + synchronize_rcu(); kfree(mod->args); free_arch_cleanup: module_arch_cleanup(mod); @@ -3834,7 +3834,7 @@ static int load_module(struct load_info *info, const char __user *uargs, mod_tree_remove(mod); wake_up_all(&module_wq); /* Wait for RCU-sched synchronizing before releasing mod->list. */ - synchronize_sched(); + synchronize_rcu(); mutex_unlock(&module_mutex); free_module: /* Free lock-classes; relies on the preceding sync_rcu() */ |