Shrink the mutex region. And save a clocksource_select action if set
clocksource is same as current clocksource.
Signed-off-by: Alex Shi <alex....@intel.com>
---
kernel/time/clocksource.c | 12 +++++++-----
1 file changed, 7 insertions(+), 5 deletions(-)
diff --git a/kernel/time/clocksource.c b/kernel/time/clocksource.c
index 021c159..9d6c333 100644
--- a/kernel/time/clocksource.c
+++ b/kernel/time/clocksource.c
@@ -885,13 +885,15 @@ static ssize_t sysfs_override_clocksource(struct device
*dev,
{
size_t ret;
- mutex_lock(&clocksource_mutex);
-
ret = sysfs_get_uname(buf, override_name, count);
- if (ret >= 0)
- clocksource_select();
+ if (ret >= 0) {
+ if (!strcmp(curr_clocksource->name, override_name))
+ return ret;
- mutex_unlock(&clocksource_mutex);
+ mutex_lock(&clocksource_mutex);
+ clocksource_select();
+ mutex_unlock(&clocksource_mutex);
+ }
return ret;
}
--
1.7.12
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