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Message-Id: <1228823938.11639.7.camel@localhost.localdomain>
Date: Tue, 09 Dec 2008 17:28:58 +0530
From: Vinay Sridhar <vinay@...ux.vnet.ibm.com>
To: linux-kernel@...r.kernel.org
Cc: jstultz@...ibm.com
Subject: [Patch] Fix sys_time to handle intra-tick correction
Hi All,
This fix changes sys_time to use do_gettimeofday instead of get_seconds.
Running the stime01 test from LTP triggers this error. Calling sys_stime
and then calling sys_time causes this. "do_settimeofday" subtracts the
nsec offset from the nsec value(0 in this case) passed to it.
Subsequently, "set_normalized_timespec" modifies sec and nsec
accordingly. This compensation is handled in the do_gettimeofday path.
However, sys_time does not handle this case and reports an incorrect
seconds value.
signed-off by : Vinay Sridhar <vinay@...ux.vnet.ibm.com>
--- time.c.orig 2008-12-04 06:30:12.000000000 -0600
+++ time.c 2008-12-04 06:31:25.000000000 -0600
@@ -61,7 +61,12 @@ EXPORT_SYMBOL(sys_tz);
*/
asmlinkage long sys_time(time_t __user * tloc)
{
- time_t i = get_seconds();
+ struct timeval t;
+ time_t i;
+
+ do_gettimeofday(&t);
+
+ i = t.tv_sec;
if (tloc) {
if (put_user(i,tloc))
--
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