CVS commit: src/sys/arch/x86/x86

["Taylor R Campbell" <riastradh%netbsd.org@localhost>]

Module Name:    src
Committed By:   riastradh
Date:           Sat Jul 25 22:10:34 UTC 2020

Modified Files:
        src/sys/arch/x86/x86: cpu_rng.c

Log Message:
Tweak VIA CPU RNG.

- Cite source for documentation.
- Omit needless kpreempt_disable/enable.
- Explain what's going on.
- Use "D"(out) rather than "+D"(out) -- no REP so no register update.
- Fix interpretation of number of bytes returned.

The last one is likely to address

[   4.0518619] aes: VIA ACE
....
[  11.7018582] cpu_rng via: failed repetition test
[  12.4718583] entropy: ready

reported by Andrius V.


To generate a diff of this commit:
cvs rdiff -u -r1.17 -r1.18 src/sys/arch/x86/x86/cpu_rng.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.