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Message-Id: <20211201174449.1359595-1-broonie@kernel.org> Date: Wed, 1 Dec 2021 17:44:49 +0000 From: Mark Brown <broonie@...nel.org> To: tytso@....edu, akpm@...ux-foundation.org Cc: linux-kernel@...r.kernel.org, Mark Brown <broonie@...nel.org> Subject: [PATCH] random: Document add_hwgenerator_randomness() with other input functions The section at the top of random.c which documents the input functions available does not document add_hwgenerator_randomness() which might lead a reader to overlook it. Add a brief note about it. Signed-off-by: Mark Brown <broonie@...nel.org> --- Ted, I've been sending this for almost two years at this point and you've not commented on it - if there's some issue please let me know. drivers/char/random.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/char/random.c b/drivers/char/random.c index 35fcc09c0228..9192da308f87 100644 --- a/drivers/char/random.c +++ b/drivers/char/random.c @@ -228,6 +228,14 @@ * particular randomness source. They do this by keeping track of the * first and second order deltas of the event timings. * + * There is also an interface for true hardware RNGs: + * + * void add_hwgenerator_randomness(const char *buffer, size_t count, + * size_t entropy); + * + * This will credit entropy as specified by the caller, if the entropy + * pool is full it will block until more entropy is needed. + * * Ensuring unpredictability at system startup * ============================================ * -- 2.30.2
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