fix kernel panic: hr_timer.function should call first

1 files changed, 1 insertions, 5 deletions

diff --git a/watch_module_lib.c b/watch_module_lib.c
index 896b1d0..a6f8307 100644
--- a/watch_module_lib.c
+++ b/watch_module_lib.c
@@ -51,10 +51,6 @@ void *access_user_space_ptr(pid_t pid, unsigned long addr)
     return kaddr + offset;
 }
 
-// for timer
-#define US2NS (1000) // Interval in microseconds
-static struct hrtimer hr_timer;
-static ktime_t kt;
 
 /// @brief hrTimer handler
 enum hrtimer_restart hrtimer_hander(struct hrtimer *timer)
@@ -85,9 +81,9 @@ int start_hrTimer(unsigned long timeout)
     kt = ktime_set(0, (unsigned long)timeout * US2NS); //  us -> ns
     // CLOCK_MONOTONIC: time since boot | HRTIMER_MODE_REL : relative time
     hrtimer_init(&hr_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); 
+    hr_timer.function = hrtimer_hander;
     // mode the same as hrtimer_init
     hrtimer_start(&hr_timer, kt, HRTIMER_MODE_REL);
-    hr_timer.function = hrtimer_hander;
     return 0;
 }