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clocksource: Don't walk the clocksource list for empty override

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If the override clocksource name is empty there is no point in walking the
clocksource list for a match.

Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: arnd@arndb.de
Cc: sboyd@codeaurora.org
Cc: broonie@kernel.org
Cc: john.stultz@linaro.org
Link: https://lkml.kernel.org/r/069ce2a605546bcad6552968cff755f0a03f9f10.1516167691.git.baolin.wang@linaro.org
This commit is contained in:
Baolin Wang 2018-01-17 14:01:28 +08:00 committed by Thomas Gleixner
parent 4a3928c6f8
commit 7f852afe44
1 changed files with 4 additions and 0 deletions
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4
kernel/time/clocksource.c
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@ -594,6 +594,9 @@ static void __clocksource_select(bool skipcur)
if (!best)
return;
if (!strlen(override_name))
goto found;
/* Check for the override clocksource. */
list_for_each_entry(cs, &clocksource_list, list) {
if (skipcur && cs == curr_clocksource)
@ -625,6 +628,7 @@ static void __clocksource_select(bool skipcur)
break;
}
found:
if (curr_clocksource != best && !timekeeping_notify(best)) {
pr_info("Switched to clocksource %s\n", best->name);
curr_clocksource = best;