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-rw-r--r--sys/i386/include/param.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/sys/i386/include/param.h b/sys/i386/include/param.h
index 90541bf..7f84e2a 100644
--- a/sys/i386/include/param.h
+++ b/sys/i386/include/param.h
@@ -98,7 +98,10 @@
#define PDRMASK (NBPDR-1)
/* PREEMPTION exposes scheduler bugs that need to be fixed. */
+#include "opt_sched.h"
+#ifdef SCHED_4BSD
#define PREEMPTION
+#endif
#define IOPAGES 2 /* pages of i/o permission bitmap */
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