2 * SPDX-License-Identifier: LGPL-2.1-only
4 * Copyright (C) 2011-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
7 #ifndef _LIBRINGBUFFER_SMP_H
8 #define _LIBRINGBUFFER_SMP_H
13 * 4kB of per-cpu data available. Enough to hold the control structures,
14 * but not ring buffers.
16 #define PER_CPU_MEM_SIZE 4096
18 extern int __num_possible_cpus
19 __attribute__((visibility("hidden")));
21 extern void _get_num_possible_cpus(void)
22 __attribute__((visibility("hidden")));
25 int num_possible_cpus(void)
27 if (!__num_possible_cpus
)
28 _get_num_possible_cpus();
29 return __num_possible_cpus
;
32 #define for_each_possible_cpu(cpu) \
33 for ((cpu) = 0; (cpu) < num_possible_cpus(); (cpu)++)
35 #endif /* _LIBRINGBUFFER_SMP_H */
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