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| author | Kees Cook <keescook@chromium.org> | 2013-11-12 15:08:49 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-11-13 12:09:13 +0900 |
| commit | 6b80239447f6785b719345e8913af420d8ec0818 (patch) | |
| tree | fdf049770237f77a86c3d9e41b1382e4d3628f5c /kernel | |
| parent | 8f6b2ae49a84841c4bcf00cff35752b223c3f8d6 (diff) | |
| download | linux-6b80239447f6785b719345e8913af420d8ec0818.tar.gz linux-6b80239447f6785b719345e8913af420d8ec0818.tar.bz2 linux-6b80239447f6785b719345e8913af420d8ec0818.zip | |
printk: report console names during cut-over
This reports the names of consoles as they're being disabled to help
identify which is which during cut-over. Helps answer the question
"which boot console actually got activated?" once the regular console is
running, mostly when debugging boot console failures.
Signed-off-by: Kees Cook <keescook@chromium.org>
Acked-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Joe Perches <joe@perches.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/printk/printk.c | 19 |
1 files changed, 9 insertions, 10 deletions
diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c index b4e8500afdb3..555ad2d445b4 100644 --- a/kernel/printk/printk.c +++ b/kernel/printk/printk.c @@ -2358,21 +2358,18 @@ void register_console(struct console *newcon) * users know there might be something in the kernel's log buffer that * went to the bootconsole (that they do not see on the real console) */ + printk(KERN_INFO "%sconsole [%s%d] enabled\n", + (newcon->flags & CON_BOOT) ? "boot" : "" , + newcon->name, newcon->index); if (bcon && ((newcon->flags & (CON_CONSDEV | CON_BOOT)) == CON_CONSDEV) && !keep_bootcon) { - /* we need to iterate through twice, to make sure we print - * everything out, before we unregister the console(s) + /* We need to iterate through all boot consoles, to make + * sure we print everything out, before we unregister them. */ - printk(KERN_INFO "console [%s%d] enabled, bootconsole disabled\n", - newcon->name, newcon->index); for_each_console(bcon) if (bcon->flags & CON_BOOT) unregister_console(bcon); - } else { - printk(KERN_INFO "%sconsole [%s%d] enabled\n", - (newcon->flags & CON_BOOT) ? "boot" : "" , - newcon->name, newcon->index); } } EXPORT_SYMBOL(register_console); @@ -2382,6 +2379,10 @@ int unregister_console(struct console *console) struct console *a, *b; int res; + printk(KERN_INFO "%sconsole [%s%d] disabled\n", + (console->flags & CON_BOOT) ? "boot" : "" , + console->name, console->index); + res = _braille_unregister_console(console); if (res) return res; @@ -2421,8 +2422,6 @@ static int __init printk_late_init(void) for_each_console(con) { if (!keep_bootcon && con->flags & CON_BOOT) { - printk(KERN_INFO "turn off boot console %s%d\n", - con->name, con->index); unregister_console(con); } } |