| commit | 82d1ed25dd0260190823a69517b17901d529b14a | |
| author | Matthew Dillon <dillon@apollo.backplane.com> | |
| Mon, 18 Jan 2010 01:23:53 +0000 (17 17:23 -0800) | ||
| committer | Matthew Dillon <dillon@apollo.backplane.com> | |
| Mon, 18 Jan 2010 01:23:53 +0000 (17 17:23 -0800) | ||
| tree | b5a3424ceb9a0f780d6cbec4375086dd924e8e8c | treesnapshot (tar.gz zip) |
| parent | 29758f2e39e0f902c9fd1811252140ad1d5e9370 | commitdiff |
kernel - add spinlock to syscons console write path
* Add a spinlock in the console write path which is shared with
general console writes (CONS_LOCK is only used for kernel console
writes).
* Fixes MP races between kprintf() and general console writes which
can cause sc->videoio_in_progress to get out of sync, causing
vga consoles to stop generating output.
* Add a spinlock in the console write path which is shared with
general console writes (CONS_LOCK is only used for kernel console
writes).
* Fixes MP races between kprintf() and general console writes which
can cause sc->videoio_in_progress to get out of sync, causing
vga consoles to stop generating output.
| sys/dev/misc/syscons/syscons.c | diffblobblamehistory | |
| sys/dev/misc/syscons/syscons.h | diffblobblamehistory |