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authorHannes Frederic Sowa <hannes@stressinduktion.org>2015-10-08 01:20:36 +0200
committerDavid S. Miller <davem@davemloft.net>2015-10-08 05:26:36 -0700
commitc90aeb948222a7b3d3391d232ec4f50fd8322ad3 (patch)
treec4625885c7705076fb157b6394fa3969b44bd9f3 /lib/random32.c
parent46234253b9363894a254844a6550b4cc5f3edfe8 (diff)
once: make helper generic for calling functions once
Make the get_random_once() helper generic enough, so that functions in general would only be called once, where one user of this is then net_get_random_once(). The only implementation specific call is to get_random_bytes(), all the rest of this *_once() facility would be duplicated among different subsystems otherwise. The new DO_ONCE() helper will be used by prandom() later on, but might also be useful for other scenarios/subsystems as well where a one-time initialization in often-called, possibly fast path code could occur. 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>
Diffstat (limited to 'lib/random32.c')
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