46234253b9
There's no good reason why users outside of networking should not be using this facility, f.e. for initializing their seeds. Therefore, make it accessible from there as get_random_once(). Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
25 lines
596 B
C
25 lines
596 B
C
#ifndef _LINUX_ONCE_H
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#define _LINUX_ONCE_H
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#include <linux/types.h>
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#include <linux/jump_label.h>
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bool __get_random_once(void *buf, int nbytes, bool *done,
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struct static_key *once_key);
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#define get_random_once(buf, nbytes) \
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({ \
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bool ___ret = false; \
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static bool ___done = false; \
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static struct static_key ___once_key = \
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STATIC_KEY_INIT_TRUE; \
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if (static_key_true(&___once_key)) \
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___ret = __get_random_once((buf), \
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(nbytes), \
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&___done, \
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&___once_key); \
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___ret; \
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})
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#endif /* _LINUX_ONCE_H */
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