From: Rusty Russell <rusty@rustcorp.com.au>
Date: Mon, 8 Dec 2014 08:50:35 +0000 (+0800)
Subject: hwrng: place mutex around read functions and buffers.
X-Git-Tag: fixes-v4.0-rc1~106^2~62
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9372b35e11149c5314f56f939775e67d83057604;p=pandora-kernel.git

hwrng: place mutex around read functions and buffers.

There's currently a big lock around everything, and it means that we
can't query sysfs (eg /sys/devices/virtual/misc/hw_random/rng_current)
while the rng is reading.  This is a real problem when the rng is slow,
or blocked (eg. virtio_rng with qemu's default /dev/random backend)

This doesn't help (it leaves the current lock untouched), just adds a
lock to protect the read function and the static buffers, in preparation
for transition.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
---

Reading git-diff-tree failed