Module Name: src
Committed By: riastradh
Date: Sun Dec 19 01:19:52 UTC 2021
Modified Files:
src/sys/external/bsd/drm2/linux: linux_rcu.c
Log Message:
Make sure the RCU GC thread processes all callbacks before dying.
To generate a diff of this commit:
cvs rdiff -u -r1.6 -r1.7 src/sys/external/bsd/drm2/linux/linux_rcu.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/external/bsd/drm2/linux/linux_rcu.c
diff -u src/sys/external/bsd/drm2/linux/linux_rcu.c:1.6 src/sys/external/bsd/drm2/linux/linux_rcu.c:1.7
--- src/sys/external/bsd/drm2/linux/linux_rcu.c:1.6 Sun Dec 19 01:19:45 2021
+++ src/sys/external/bsd/drm2/linux/linux_rcu.c Sun Dec 19 01:19:52 2021
@@ -1,4 +1,4 @@
-/* $NetBSD: linux_rcu.c,v 1.6 2021/12/19 01:19:45 riastradh Exp $ */
+/* $NetBSD: linux_rcu.c,v 1.7 2021/12/19 01:19:52 riastradh Exp $ */
/*-
* Copyright (c) 2018 The NetBSD Foundation, Inc.
@@ -30,7 +30,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: linux_rcu.c,v 1.6 2021/12/19 01:19:45 riastradh Exp $");
+__KERNEL_RCSID(0, "$NetBSD: linux_rcu.c,v 1.7 2021/12/19 01:19:52 riastradh Exp $");
#include <sys/param.h>
#include <sys/types.h>
@@ -169,12 +169,20 @@ gc_thread(void *cookie)
mutex_enter(&gc.lock);
gc.gen++; /* done running */
cv_broadcast(&gc.cv); /* notify rcu_barrier */
+
+ /*
+ * Go back to the top and get more work before
+ * deciding whether to stop so that we
+ * guarantee to run all callbacks.
+ */
+ continue;
}
/* If we're asked to close shop, do so. */
if (gc.dying)
break;
}
+ KASSERT(gc.first == NULL);
mutex_exit(&gc.lock);
kthread_exit(0);
