Re: [PATCH 1/6] Documentation: hw_random: Fix device node name /dev/hw_random => /dev/hwrng
From: Kieran Bingham <hidden>
Date: 2015-09-14 14:57:40
Also in:
linux-arm-kernel, linux-crypto, lkml
Hi Lee, On 11 September 2015 at 21:08, Lee Jones [off-list ref] wrote:
In April 2099, commit d405640
That's impressive ... :D
("Driver Core: misc: add node name support
for misc devices.") inadvertently changed the device node name from
/dev/hw_random to /dev/hwrng. Since 6 years has passed since the change
it seems unpractical to change it back now, as this node name is probably
considered ABI by now. So instead, we'll just change the documentation
to match the current situation.Ugh ... how messy ... but yes - I agree it may be too late to change back as rngd already defaults to /dev/hwrng Perhaps you could just use your time machine to continue back in time to before it was used :-) In fact can I borrow it after you're done please :) Other than 's/2099/2009/g' - The patch is OK. All entries to /dev/hw_random in hw_random.txt converted, but outside of Documentation, drivers/char/hw_random/Kconfig also references /dev/hw_random ... Therefore perhaps that could be updated in this patch too? -- Kieran Now available for: $GREATCOMPANY add -A linuxdevs/kieranbingham/ && \ $GREATCOMPANY commit -m "HR: Add fantastic new employee"
quoted hunk ↗ jump to hunk
NB: It looks like rng-tools have already been updated. Signed-off-by: Lee Jones <redacted> --- Documentation/hw_random.txt | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-)diff --git a/Documentation/hw_random.txt b/Documentation/hw_random.txt index 026e237..fce1634 100644 --- a/Documentation/hw_random.txt +++ b/Documentation/hw_random.txt@@ -3,7 +3,7 @@ Introduction: The hw_random framework is software that makes use of a special hardware feature on your CPU or motherboard, a Random Number Generator (RNG). The software has two parts: - a core providing the /dev/hw_random character device and its + a core providing the /dev/hwrng character device and its sysfs support, plus a hardware-specific driver that plugs into that core.@@ -14,7 +14,7 @@ Introduction: http://sourceforge.net/projects/gkernel/ - Those tools use /dev/hw_random to fill the kernel entropy pool, + Those tools use /dev/hwrng to fill the kernel entropy pool, which is used internally and exported by the /dev/urandom and /dev/random special files.@@ -32,13 +32,13 @@ Theory of operation: The rng-tools package uses such tests in "rngd", and lets you run them by hand with a "rngtest" utility. - /dev/hw_random is char device major 10, minor 183. + /dev/hwrng is char device major 10, minor 183. CLASS DEVICE. There is a /sys/class/misc/hw_random node with two unique attributes, "rng_available" and "rng_current". The "rng_available" attribute lists the hardware-specific drivers available, while "rng_current" lists the one which is currently - connected to /dev/hw_random. If your system has more than one + connected to /dev/hwrng. If your system has more than one RNG available, you may change the one used by writing a name from the list in "rng_available" into "rng_current". --1.9.1 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html
-- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html