volume_mutex 7262 drivers/platform/x86/thinkpad_acpi.c static struct mutex volume_mutex; volume_mutex 7285 drivers/platform/x86/thinkpad_acpi.c if (mutex_lock_killable(&volume_mutex) < 0) volume_mutex 7308 drivers/platform/x86/thinkpad_acpi.c mutex_unlock(&volume_mutex); volume_mutex 7357 drivers/platform/x86/thinkpad_acpi.c if (mutex_lock_killable(&volume_mutex) < 0) volume_mutex 7374 drivers/platform/x86/thinkpad_acpi.c mutex_unlock(&volume_mutex); volume_mutex 7405 drivers/platform/x86/thinkpad_acpi.c if (mutex_lock_killable(&volume_mutex) < 0) volume_mutex 7421 drivers/platform/x86/thinkpad_acpi.c mutex_unlock(&volume_mutex); volume_mutex 7717 drivers/platform/x86/thinkpad_acpi.c mutex_init(&volume_mutex);