From: Stephan Mueller <smueller@chronox.de>
To: Herbert Xu <herbert@gondor.apana.org.au>
Cc: pebolle@tiscali.nl, andreas.steffen@strongswan.org,
tytso@mit.edu, sandyinchina@gmail.com,
linux-kernel@vger.kernel.org, linux-crypto@vger.kernel.org
Subject: Re: [PATCH v7 1/5] random: Blocking API for accessing nonblocking_pool
Date: Wed, 20 May 2015 21:38:38 +0200 [thread overview]
Message-ID: <1985784.azciXBjbjY@tachyon.chronox.de> (raw)
In-Reply-To: <3555912.bTyystq8tU@tachyon.chronox.de>
Am Mittwoch, 20. Mai 2015, 20:49:45 schrieb Stephan Mueller:
Hi Herbert,
> > This is just a convoluted way of doing an uninterruptible sleep.
> > Either make it uninterruptible or allow the function to return
> > an error.
>
> Sorry, I overlooked the availability of wait_event. I was looking for it
> initially, but missed it. I will fix it right away.
After checking a bit more, I see that an uninterruptible sleep cannot be
canceled with cancel_work_sync. Therefore, replacing it with wait_event does
not work.
Thus, go get an uninterruptible sleep which yet can be canceled seems to
require wait_event_interruptible together with the check for ERESTARTSYS.
Nonetheless, I move the loop out to the DRBG code as requested.
--
Ciao
Stephan
next prev parent reply other threads:[~2015-05-20 19:38 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-20 17:44 [PATCH v7 0/5] Seeding DRBG with more entropy Stephan Mueller
2015-05-20 17:44 ` [PATCH v7 1/5] random: Blocking API for accessing nonblocking_pool Stephan Mueller
2015-05-20 18:45 ` Herbert Xu
2015-05-20 18:49 ` Stephan Mueller
2015-05-20 19:38 ` Stephan Mueller [this message]
2015-05-20 17:45 ` [PATCH v7 2/5] crypto: drbg - prepare for async seeding Stephan Mueller
2015-05-20 17:45 ` [PATCH v7 3/5] crypto: drbg - add async seeding operation Stephan Mueller
2015-05-20 17:46 ` [PATCH v7 4/5] crypto: drbg - use Jitter RNG to obtain seed Stephan Mueller
2015-05-20 17:46 ` [PATCH v7 5/5] crypto: add jitterentropy RNG Stephan Mueller
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