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| author | Lee Jones <lee.jones@linaro.org> | 2015-09-17 14:45:51 +0100 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2015-09-21 22:00:41 +0800 |
| commit | e9e23158f2f5a0992f27d367aa1f11ba12b0b54c (patch) | |
| tree | 3de0f975c851fe86ab5faa4ae94a2cb39345f683 /Documentation/hw_random.txt | |
| parent | 4dd17c9c8a30c8d8cd1c9d4b94f08aca4b038d3e (diff) | |
| download | lwn-e9e23158f2f5a0992f27d367aa1f11ba12b0b54c.tar.gz lwn-e9e23158f2f5a0992f27d367aa1f11ba12b0b54c.zip | |
hwrng: doc - Fix device node name reference /dev/hw_random => /dev/hwrng
In April 2009, commit d405640 ("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, as this node name is probably
considered ABI by now. So instead, we'll just change the documentation
to match the current situation.
NB: It looks like rng-tools have already been updated.
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Acked-by: Kieran Bingham <kieranbingham@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'Documentation/hw_random.txt')
| -rw-r--r-- | Documentation/hw_random.txt | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/Documentation/hw_random.txt b/Documentation/hw_random.txt index 026e237bbc87..fce1634907d0 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". |