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-rw-r--r--kernel/printk.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/kernel/printk.c b/kernel/printk.c
index de1a4f4..07ad9e7 100644
--- a/kernel/printk.c
+++ b/kernel/printk.c
@@ -123,6 +123,8 @@ struct console_cmdline
static struct console_cmdline console_cmdline[MAX_CMDLINECONSOLES];
static int selected_console = -1;
static int preferred_console = -1;
+int console_set_on_cmdline;
+EXPORT_SYMBOL(console_set_on_cmdline);
/* Flag: console code may call schedule() */
static int console_may_schedule;
@@ -870,6 +872,7 @@ static int __init console_setup(char *str)
*s = 0;
__add_preferred_console(buf, idx, options, brl_options);
+ console_set_on_cmdline = 1;
return 1;
}
__setup("console=", console_setup);
@@ -1021,7 +1024,9 @@ void release_console_sem(void)
_log_end = log_end;
con_start = log_end; /* Flush */
spin_unlock(&logbuf_lock);
+ stop_critical_timings(); /* don't trace print latency */
call_console_drivers(_con_start, _log_end);
+ start_critical_timings();
local_irq_restore(flags);
}
console_locked = 0;
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