diff options
| author | Matthew Wilcox <matthew@wil.cx> | 2005-03-28 03:57:38 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-03-28 03:57:38 -0800 |
| commit | e758da38da22c0863cf96323077323080ffc9ad9 (patch) | |
| tree | 5febc256e23492b6a7c8885f256ee8bd3fa9aec2 /kernel | |
| parent | 798f347f11469414d73411cf41adc826ff5bb6bb (diff) | |
[PATCH] New console flag: CON_BOOT
CON_BOOT is like early printk in that it allows for output really early on.
It's better than early printk because it unregisters automatically when a
real console is initialised. So if you don't get consoles registering in
console_init, there isn't a huge delay between the boot console
unregistering and the real console starting. This is the case on PA-RISC
where we have serial ports that aren't discovered until the PCI bus has
been walked.
I think all the current early printk users could be converted to this
scheme with a minimal amount of effort.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/printk.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/kernel/printk.c b/kernel/printk.c index e5a2222f477e..5d5754964bf4 100644 --- a/kernel/printk.c +++ b/kernel/printk.c @@ -861,6 +861,11 @@ void register_console(struct console * console) if (!(console->flags & CON_ENABLED)) return; + if (console_drivers && (console_drivers->flags & CON_BOOT)) { + unregister_console(console_drivers); + console->flags &= ~CON_PRINTBUFFER; + } + /* * Put this console in the list - keep the * preferred driver at the head of the list. |