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-rw-r--r--tools/power/acpi/common/getopt.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/power/acpi/common/getopt.c b/tools/power/acpi/common/getopt.c
index 24966290ad1c..efefe309367a 100644
--- a/tools/power/acpi/common/getopt.c
+++ b/tools/power/acpi/common/getopt.c
@@ -47,6 +47,7 @@
* Option strings:
* "f" - Option has no arguments
* "f:" - Option requires an argument
+ * "f+" - Option has an optional argument
* "f^" - Option has optional single-char sub-options
* "f|" - Option has required single-char sub-options
*/