[PATCH] shrink printk timestamp field

[Joe Korty <joe.korty@ccur.com>]

Shrink the printk timestamp field.

Keep the printk timestamp from occupying more of the
scarce, 80-column console line space than it really needs.

We eliminate the excessive whitespace the field added to
the line, and reduce timestamp precision from six digits
(usecs) to three digits (msecs).  msecs seems adequate
for the purpose of tracking boot sequence timing issues.

Signed-off-by: Joe Korty <joe.korty@ccur.com>

Index: 2.6.27-rc4-git4/kernel/printk.c
===================================================================
--- 2.6.27-rc4-git4.orig/kernel/printk.c	2008-08-26 18:23:03.000000000 -0400
+++ 2.6.27-rc4-git4/kernel/printk.c	2008-08-26 18:23:49.000000000 -0400
@@ -739,9 +739,9 @@
 
 				t = cpu_clock(printk_cpu);
 				nanosec_rem = do_div(t, 1000000000);
-				tlen = sprintf(tbuf, "[%5lu.%06lu] ",
+				tlen = sprintf(tbuf, "[%3lu.%03lu] ",
 						(unsigned long) t,
-						nanosec_rem / 1000);
+						nanosec_rem / 1000000);
 
 				for (tp = tbuf; tp < tbuf + tlen; tp++)
 					emit_log_char(*tp);