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9372b35e11
linux/drivers/char/hw_random
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Rusty Russell 9372b35e11 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>
2014-12-22 23:02:38 +11:00
..
amd-rng.c hwrng: printk replacement 2014-10-02 14:35:00 +08:00
atmel-rng.c Driver core patches for 3.19-rc1 2014-12-14 16:10:09 -08:00
bcm63xx-rng.c char: hw_random: drop owner assignment from platform_drivers 2014-10-20 16:20:20 +02:00
bcm2835-rng.c char: hw_random: drop owner assignment from platform_drivers 2014-10-20 16:20:20 +02:00
core.c hwrng: place mutex around read functions and buffers. 2014-12-22 23:02:38 +11:00
exynos-rng.c Driver core patches for 3.19-rc1 2014-12-14 16:10:09 -08:00
geode-rng.c hwrng: printk replacement 2014-10-02 14:35:00 +08:00
intel-rng.c hwrng: printk replacement 2014-10-02 14:35:00 +08:00
ixp4xx-rng.c IXP4xx: HW pseudo-random generator is available on IXP45x/46x only. 2012-11-22 03:35:39 +00:00
Kconfig hwrng: atmel - add DT support 2014-11-20 22:39:41 +08:00
Makefile hwrng: xgene - add support for APM X-Gene SoC RNG support 2014-08-29 21:46:38 +08:00
msm-rng.c char: hw_random: drop owner assignment from platform_drivers 2014-10-20 16:20:20 +02:00
mxc-rnga.c char: hw_random: drop owner assignment from platform_drivers 2014-10-20 16:20:20 +02:00
n2-asm.S sparc64: Add Niagara2 RNG driver. 2008-07-18 00:46:09 -07:00
n2-drv.c char: hw_random: drop owner assignment from platform_drivers 2014-10-20 16:20:20 +02:00
n2rng.h n2rng: Attach on Niagara-T3. 2011-07-28 01:26:30 -07:00
nomadik-rng.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2014-04-03 09:28:16 -07:00
octeon-rng.c char: hw_random: drop owner assignment from platform_drivers 2014-10-20 16:20:20 +02:00
omap3-rom-rng.c char: hw_random: drop owner assignment from platform_drivers 2014-10-20 16:20:20 +02:00
omap-rng.c char: hw_random: drop owner assignment from platform_drivers 2014-10-20 16:20:20 +02:00
pasemi-rng.c char: hw_random: drop owner assignment from platform_drivers 2014-10-20 16:20:20 +02:00
powernv-rng.c hwrng: Add a driver for the hwrng found in power7+ systems 2013-10-11 16:50:20 +11:00
ppc4xx-rng.c char: hw_random: drop owner assignment from platform_drivers 2014-10-20 16:20:20 +02:00
pseries-rng.c hwrng: pseries - port to new read API and fix stack corruption 2014-11-06 23:10:22 +08:00
timeriomem-rng.c char: hw_random: drop owner assignment from platform_drivers 2014-10-20 16:20:20 +02:00
tpm-rng.c hw_random: add support for the TPM chip as a hardware RNG source 2012-08-22 11:11:41 -05:00
tx4939-rng.c char: hw_random: drop owner assignment from platform_drivers 2014-10-20 16:20:20 +02:00
via-rng.c hwrng: printk replacement 2014-10-02 14:35:00 +08:00
virtio-rng.c One cc: stable commit, the rest are a series of minor cleanups which have 2014-10-18 10:25:09 -07:00
xgene-rng.c hwrng: xgene - add support for APM X-Gene SoC RNG support 2014-08-29 21:46:38 +08:00