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Merge branch 'linus' into locking/core, to pick up fixes

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Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Ingo Molnar
2017-04-14 10:29:40 +02:00
parent def34eaae5 a232591ba2
commit 0ba78a95a6
1002 changed files with 13795 additions and 7321 deletions
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28
kernel/cpu.c
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@@ -1337,26 +1337,21 @@ static int cpuhp_store_callbacks(enum cpuhp_state state, const char *name,
struct cpuhp_step *sp;
int ret = 0;
mutex_lock(&cpuhp_state_mutex);
if (state == CPUHP_AP_ONLINE_DYN || state == CPUHP_BP_PREPARE_DYN) {
ret = cpuhp_reserve_state(state);
if (ret < 0)
goto out;
return ret;
state = ret;
}
sp = cpuhp_get_step(state);
if (name && sp->name) {
ret = -EBUSY;
goto out;
}
if (name && sp->name)
return -EBUSY;
sp->startup.single = startup;
sp->teardown.single = teardown;
sp->name = name;
sp->multi_instance = multi_instance;
INIT_HLIST_HEAD(&sp->list);
out:
mutex_unlock(&cpuhp_state_mutex);
return ret;
}
@@ -1430,6 +1425,7 @@ int __cpuhp_state_add_instance(enum cpuhp_state state, struct hlist_node *node,
return -EINVAL;
get_online_cpus();
mutex_lock(&cpuhp_state_mutex);
if (!invoke || !sp->startup.multi)
goto add_node;
@@ -1449,16 +1445,14 @@ int __cpuhp_state_add_instance(enum cpuhp_state state, struct hlist_node *node,
if (ret) {
if (sp->teardown.multi)
cpuhp_rollback_install(cpu, state, node);
goto err;
goto unlock;
}
}
add_node:
ret = 0;
mutex_lock(&cpuhp_state_mutex);
hlist_add_head(node, &sp->list);
unlock:
mutex_unlock(&cpuhp_state_mutex);
err:
put_online_cpus();
return ret;
}
@@ -1493,6 +1487,7 @@ int __cpuhp_setup_state(enum cpuhp_state state,
return -EINVAL;
get_online_cpus();
mutex_lock(&cpuhp_state_mutex);
ret = cpuhp_store_callbacks(state, name, startup, teardown,
multi_instance);
@@ -1526,6 +1521,7 @@ int __cpuhp_setup_state(enum cpuhp_state state,
}
}
out:
mutex_unlock(&cpuhp_state_mutex);
put_online_cpus();
/*
* If the requested state is CPUHP_AP_ONLINE_DYN, return the
@@ -1549,6 +1545,8 @@ int __cpuhp_state_remove_instance(enum cpuhp_state state,
return -EINVAL;
get_online_cpus();
mutex_lock(&cpuhp_state_mutex);
if (!invoke || !cpuhp_get_teardown_cb(state))
goto remove;
/*
@@ -1565,7 +1563,6 @@ int __cpuhp_state_remove_instance(enum cpuhp_state state,
}
remove:
mutex_lock(&cpuhp_state_mutex);
hlist_del(node);
mutex_unlock(&cpuhp_state_mutex);
put_online_cpus();
@@ -1573,6 +1570,7 @@ remove:
return 0;
}
EXPORT_SYMBOL_GPL(__cpuhp_state_remove_instance);
/**
* __cpuhp_remove_state - Remove the callbacks for an hotplug machine state
* @state: The state to remove
@@ -1591,6 +1589,7 @@ void __cpuhp_remove_state(enum cpuhp_state state, bool invoke)
get_online_cpus();
mutex_lock(&cpuhp_state_mutex);
if (sp->multi_instance) {
WARN(!hlist_empty(&sp->list),
"Error: Removing state %d which has instances left.\n",
@@ -1615,6 +1614,7 @@ void __cpuhp_remove_state(enum cpuhp_state state, bool invoke)
}
remove:
cpuhp_store_callbacks(state, NULL, NULL, NULL, false);
mutex_unlock(&cpuhp_state_mutex);
put_online_cpus();
}
EXPORT_SYMBOL(__cpuhp_remove_state);