futex: Mark expected switch fall-throughs

In preparation of enabling -Wimplicit-fallthrough, mark switch cases which
fall through.

Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Darren Hart <dvhart@infradead.org>
Link: https://lkml.kernel.org/r/20180816172124.GA2407@embeddedor.com

diff --git a/kernel/futex.c b/kernel/futex.c
index 1f450e092c7416e3d43aba84da7b73b9a2a47b3d..11fc3bb456d65d666d1f80d062a11d3e00d41a3f 100644 (file)
--- a/kernel/futex.c
+++ b/kernel/futex.c
@@ -3523,10 +3523,12 @@ long do_futex(u32 __user *uaddr, int op, u32 val, ktime_t *timeout,
        switch (cmd) {
        case FUTEX_WAIT:
                val3 = FUTEX_BITSET_MATCH_ANY;
+               /* fall through */
        case FUTEX_WAIT_BITSET:
                return futex_wait(uaddr, flags, val, timeout, val3);
        case FUTEX_WAKE:
                val3 = FUTEX_BITSET_MATCH_ANY;
+               /* fall through */
        case FUTEX_WAKE_BITSET:
                return futex_wake(uaddr, flags, val, val3);
        case FUTEX_REQUEUE: