user/sven/linux.git/include/linux/once.h, branch v4.7Linux Kernel
https://git.stealer.net/cgit.cgi/user/sven/linux.git/atom?h=v4.72015-10-08T12:26:36Zonce: make helper generic for calling functions once2015-10-08T12:26:36ZHannes Frederic Sowahannes@stressinduktion.org2015-10-07T23:20:36Zurn:sha1:c90aeb948222a7b3d3391d232ec4f50fd8322ad3
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>
net: move net_get_random_once to lib2015-10-08T12:26:35ZHannes Frederic Sowahannes@stressinduktion.org2015-10-07T23:20:35Zurn:sha1:46234253b9363894a254844a6550b4cc5f3edfe8
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>