ksud: report module mounted event to kernel

userspace/ksud/src/event.rs

@@ -152,6 +152,9 @@ pub fn on_post_data_fs() -> Result<()> {
     mount::AutoMountExt4::try_new(target_update_img, module_dir, false)
         .with_context(|| "mount module image failed".to_string())?;
 
+    // tell kernel that we've mount the module, so that it can do some optimization
+    crate::ksu::report_module_mounted();
+
     // if we are in safe mode, we should disable all modules
     if safe_mode {
         warn!("safe mode, skip post-fs-data scripts and disable all modules!");

userspace/ksud/src/ksu.rs

@@ -29,6 +29,7 @@ pub const CMD_CHECK_SAFEMODE: u64 = 9;
 
 const EVENT_POST_FS_DATA: u64 = 1;
 const EVENT_BOOT_COMPLETED: u64 = 2;
+const EVENT_MODULE_MOUNTED: u64 = 3;
 
 #[cfg(any(target_os = "linux", target_os = "android"))]
 pub fn grant_root() -> Result<()> {
@@ -339,3 +340,7 @@ pub fn report_post_fs_data() {
 pub fn report_boot_complete() {
     report_event(EVENT_BOOT_COMPLETED);
 }
+
+pub fn report_module_mounted() {
+    report_event(EVENT_MODULE_MOUNTED);
+}