From 19ef9309273d26cb005cb23e6a370353dca91099 Mon Sep 17 00:00:00 2001
From: Ingo Molnar <mingo@elte.hu>
Date: Fri, 25 Jan 2008 21:08:34 +0100
Subject: [PATCH] printk: use ktime_get()

printk timestamps: use ktime_get().

Some platforms have a functioning clocksource function only after
they are done with early bootup, so delay this until out of
SYSTEM_BOOTING state.

it's also inherently safe now, as any bugs in this area will be
caught by the printk recursion checks.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
 kernel/printk.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/kernel/printk.c b/kernel/printk.c
index 3b7c968d0ef994..423a8c765a5788 100644
--- a/kernel/printk.c
+++ b/kernel/printk.c
@@ -702,7 +702,9 @@ asmlinkage int vprintk(const char *fmt, va_list args)
 					loglev_char = default_message_loglevel
 						+ '0';
 				}
-				t = cpu_clock(printk_cpu);
+				t = 0;
+				if (system_state != SYSTEM_BOOTING)
+					t = ktime_to_ns(ktime_get());
 				nanosec_rem = do_div(t, 1000000000);
 				tlen = sprintf(tbuf,
 						"<%c>[%5lu.%06lu] ",
-- 
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