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-rw-r--r--sys/dev/acpica/acpica_support.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/sys/dev/acpica/acpica_support.c b/sys/dev/acpica/acpica_support.c
index 00951ab91c7a8..749edbddad7ac 100644
--- a/sys/dev/acpica/acpica_support.c
+++ b/sys/dev/acpica/acpica_support.c
@@ -85,7 +85,9 @@ AcpiEnterSleepStateS4Bios (
/* flush caches */
+#ifdef __i386__
wbinvd();
+#endif
/* write the value to command port and wait until we enter sleep state */
do