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ttyprintk: make the printk log level configurable

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For some use cases it is handy to use a different printk log level than the
default (info) for the messages written to ttyprintk, so add a Kconfig
option similar to what we have for default console loglevel.

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Peter Korsgaard 2018-11-06 23:11:37 +01:00 committed by Greg Kroah-Hartman
parent 397bd9211f
commit acef6660d3
2 changed files with 11 additions and 1 deletions
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8
drivers/char/Kconfig
View File

@ -66,6 +66,14 @@ config TTY_PRINTK
If unsure, say N.
config TTY_PRINTK_LEVEL
depends on TTY_PRINTK
int "ttyprintk log level (1-7)"
range 1 7
default "6"
help
Printk log level to use for ttyprintk messages.
config PRINTER
tristate "Parallel printer support"
depends on PARPORT

4
drivers/char/ttyprintk.c
View File

@ -37,6 +37,8 @@ static struct ttyprintk_port tpk_port;
*/
#define TPK_STR_SIZE 508 /* should be bigger then max expected line length */
#define TPK_MAX_ROOM 4096 /* we could assume 4K for instance */
#define TPK_PREFIX KERN_SOH __stringify(CONFIG_TTY_PRINTK_LEVEL)
static int tpk_curr;
static char tpk_buffer[TPK_STR_SIZE + 4];
@ -45,7 +47,7 @@ static void tpk_flush(void)
{
if (tpk_curr > 0) {
tpk_buffer[tpk_curr] = '\0';
pr_info("[U] %s\n", tpk_buffer);
printk(TPK_PREFIX "[U] %s\n", tpk_buffer);
tpk_curr = 0;
}
}