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-rw-r--r--kernel/futex.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/futex.c b/kernel/futex.c
index 815d7af2ffe8..f3a3a071283c 100644
--- a/kernel/futex.c
+++ b/kernel/futex.c
@@ -343,6 +343,8 @@ static void get_futex_key_refs(union futex_key *key)
case FUT_OFF_MMSHARED:
futex_get_mm(key); /* implies MB (B) */
break;
+ default:
+ smp_mb(); /* explicit MB (B) */
}
}