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add printk.time option, deprecate 'time'

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Allow printk_time to be enabled or disabled at boot time.  Previously it
could be enabled only, but not disabled.

Change printk_time from an int to a bool since that's what it is.  Make its
logical (exposed) name just be "time" (was "printk_time").

Note: Changes kernel boot option syntax from "time" to "printk.time=value".

Since printk_time is declared as a module_param, it can also be
changed at run-time by modifying
  /sys/module/printk/parameters/time
to a value of 1/Y/y to enabled it or 0/N/n to disable it.

Since printk_time is declared as a module_param, its value can also
be set at boot-time by using
  linux printk.time=<bool>

If the "time" boot option is used, print a message that it is deprecated
and will be removed.

Note its planned removal in feature-removal-schedule.txt.

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Randy Dunlap
2007-07-15 23:40:25 -07:00
committed by Linus Torvalds
parent 185848707e
commit e84845c4bf
3 changed files with 16 additions and 1 deletions
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5
kernel/printk.c
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@@ -449,13 +449,16 @@ static int printk_time = 1;
#else
static int printk_time = 0;
#endif
module_param(printk_time, int, S_IRUGO | S_IWUSR);
module_param_named(time, printk_time, bool, S_IRUGO | S_IWUSR);
static int __init printk_time_setup(char *str)
{
if (*str)
return 0;
printk_time = 1;
printk(KERN_NOTICE "The 'time' option is deprecated and "
"is scheduled for removal in early 2008\n");
printk(KERN_NOTICE "Use 'printk.time=<value>' instead\n");
return 1;
}