Kernel: Support more clocks in sys$clock_getres()

Support all the available clocks in clock_getres(). Also, fix this
function to use the actual ticks per second value, not the constant
`_SC_CLK_TCK` (which is always equal to 8) and move the resolution
computation logic to TimeManagement.

1 files changed, 5 insertions, 10 deletions

diff --git a/Kernel/Syscalls/clock.cpp b/Kernel/Syscalls/clock.cpp
index 0f0f5d4d7e..8dc4571e71 100644
--- a/Kernel/Syscalls/clock.cpp
+++ b/Kernel/Syscalls/clock.cpp
@@ -98,16 +98,11 @@ ErrorOr<FlatPtr> Process::sys$clock_getres(Userspace<Syscall::SC_clock_getres_pa
 {
     VERIFY_NO_PROCESS_BIG_LOCK(this);
     auto params = TRY(copy_typed_from_user(user_params));
-    timespec ts {};
-    switch (params.clock_id) {
-    case CLOCK_REALTIME:
-        ts.tv_sec = 0;
-        ts.tv_nsec = 1000000000 / _SC_CLK_TCK;
-        TRY(copy_to_user(params.result, &ts));
-        break;
-    default:
-        return EINVAL;
-    }
+
+    TRY(TimeManagement::validate_clock_id(params.clock_id));
+
+    auto ts = TimeManagement::the().clock_resolution().to_timespec();
+    TRY(copy_to_user(params.result, &ts));
     return 0;
 }