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| author | Lai Jiangshan <[email protected]> | 2009-03-30 13:48:00 +0800 |
|---|---|---|
| committer | Ingo Molnar <[email protected]> | 2009-04-07 13:59:23 +0200 |
| commit | cf8e3474654f20433aab9aa35826d43b5f245008 (patch) | |
| tree | bbb3e87ca324ae4192fd524c0777047ee075c5d9 /net/lapb/lapb_iface.c | |
| parent | 301fd748e2c81e78e74edbc694a64caa7b95dda2 (diff) | |
tracing: fix incorrect return type of ns2usecs()
Impact: fix time output bug in 32bits system
ns2usecs() returns 'long', it's incorrect.
(In i386)
...
<idle>-0 [000] 521.442100: _spin_lock <-tick_do_update_jiffies64
<idle>-0 [000] 521.442101: do_timer <-tick_do_update_jiffies64
<idle>-0 [000] 521.442102: update_wall_time <-do_timer
<idle>-0 [000] 521.442102: update_xtime_cache <-update_wall_time
....
(It always print the time less than 2200 seconds besides ...)
Because 'long' is 32bits in i386. ( (1<<31) useconds is about 2200 seconds)
...
<idle>-0 [001] 4154502640.134759: rcu_bh_qsctr_inc <-__do_softirq
<idle>-0 [001] 4154502640.134760: _local_bh_enable <-__do_softirq
<idle>-0 [001] 4154502640.134761: idle_cpu <-irq_exit
...
(very large value)
Because 'long' is a signed type and it is 32bits in i386.
Changes in v2:
return 'unsigned long long' instead of 'cycle_t'
Signed-off-by: Lai Jiangshan <[email protected]>
LKML-Reference: <[email protected]>
Reported-by: Li Zefan <[email protected]>
Acked-by: Frederic Weisbecker <[email protected]>
Signed-off-by: Steven Rostedt <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
Diffstat (limited to 'net/lapb/lapb_iface.c')
0 files changed, 0 insertions, 0 deletions