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This adds "struct ratelimit" and "ratelimit_test()". It's a very simple rate-limit helper modeled after Linux' lib/ratelimit.c by Dave Young. This comes in handy to limit log-messages in possible busy loops etc.. Signed-off-by: David Herrmann <dh.herrmann@gmail.com> Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net> Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
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