The Linux Kernel API | ||
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The caller must take whatever precautions are necessary (such as holding appropriate locks) to avoid racing with another list-mutation primitive, such as hlist_add_head_rcu or hlist_del_rcu, running on this same list. However, it is perfectly legal to run concurrently with the _rcu list-traversal primitives, such as hlist_for_each_rcu, used to prevent memory-consistency problems on Alpha CPUs. Regardless of the type of CPU, the list-traversal primitive must be guarded by rcu_read_lock.
The caller must take whatever precautions are necessary (such as holding appropriate locks) to avoid racing with another list-mutation primitive, such as hlist_add_head_rcu or hlist_del_rcu, running on this same list. However, it is perfectly legal to run concurrently with the _rcu list-traversal primitives, such as hlist_for_each_rcu, used to prevent memory-consistency problems on Alpha CPUs. Regardless of the type of CPU, the list-traversal primitive must be guarded by rcu_read_lock.
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