Commit-ID: 7f852afe448c95691ead6b57bae5f37562d060b5
Gitweb: https://git.kernel.org/tip/7f852afe448c95691ead6b57bae5f37562d060b5
Author: Baolin Wang <baolin.wang@xxxxxxxxxx>
AuthorDate: Wed, 17 Jan 2018 14:01:28 +0800
Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitDate: Wed, 28 Feb 2018 14:04:52 +0100
clocksource: Don't walk the clocksource list for empty override
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@xxxxxxxxxx>
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: arnd@xxxxxxxx
Cc: sboyd@xxxxxxxxxxxxxx
Cc: broonie@xxxxxxxxxx
Cc: john.stultz@xxxxxxxxxx
Link: https://lkml.kernel.org/r/069ce2a605546bcad6552968cff755f0a03f9f10.1516167691.git.baolin.wang@xxxxxxxxxx
---
kernel/time/clocksource.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/kernel/time/clocksource.c b/kernel/time/clocksource.c
index 65f9e3f24dde..c5fdcb13200f 100644
--- a/kernel/time/clocksource.c
+++ b/kernel/time/clocksource.c
@@ -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;
--
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