kern/thread: remove sref registration calls

The upcoming RCU implementation requires scalable reference counters to
be usable in interrupt context, and in particular, in the periodic tick
handler, when an idle thread may be running, and the local processor is
not registered.

1 files changed, 0 insertions, 11 deletions

diff --git a/kern/thread.c b/kern/thread.c
index 20378ffb..63af1bde 100644
--- a/kern/thread.c
+++ b/kern/thread.c
@@ -2108,7 +2108,6 @@ static void
 thread_idle(void *arg)
 {
     struct thread *self;
-    int error;
 
     (void)arg;
 
@@ -2116,13 +2115,6 @@ thread_idle(void *arg)
 
     for (;;) {
         thread_preempt_disable();
-        error = sref_unregister();
-
-        if (error) {
-            assert(error == ERROR_BUSY);
-            goto error_sref;
-        }
-
         llsync_unregister();
 
         for (;;) {
@@ -2137,9 +2129,6 @@ thread_idle(void *arg)
         }
 
         llsync_register();
-        sref_register();
-
-error_sref:
         thread_preempt_enable();
     }
 }