SVNews r327815

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2018-01-11 09:42:24 - r327815 by wma (wma)

Complete list of files affected by revision r327815:

(Note: At the moment, these links point to ViewVC on svn.freebsd.org. They are probably slow. Do not overuse.)

  History   Contents   Diff   MODIFY   /head/sys/powerpc/powernv/opal_console.c  

Commit message:

PowerNV: add buffer for OPAL console

Avoid the lock in vtophys() by providing a static direct-mapped
spinlock- protected output buffer to use when the console driver
cannot acquire locks for some reason. This allows the idle thread
to use printf() (e.g. the SMP startup messages) without crashing
the kernel.

Created by: Nathan Whitehorn <nwhitehorn@freebsd.org>
Submitted by: Wojciech Macek <wma@freebsd.org>
Sponsored by: FreeBSD Foundation

 


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