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11 This document explains the purpose of the local atomic operations, how
18     Note that ``local_t`` based operations are not recommended for general
19     kernel use. Please use the ``this_cpu`` operations instead unless there is
21     replaced by ``this_cpu`` operations. ``this_cpu`` operations combine the
26 Purpose of local atomic operations
29 Local atomic operations are meant to provide fast and highly reentrant per CPU
30 counters. They minimize the performance cost of standard atomic operations by
39 Local atomic operations only guarantee variable modification atomicity wrt the
50 It can be done by slightly modifying the standard atomic operations: only
63 Rules to follow when using local atomic operations
87 How to use local atomic operations
104 local atomic operations: it makes sure that preemption is disabled around write