qemu/atomic: Remove pre-C11 atomic fallbacks

We now require c11, so the fallbacks are now dead code

Tested-by: Cole Robinson <crobinso@redhat.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

1 files changed, 0 insertions, 7 deletions

diff --git a/configure b/configure
index 232c54dcc1..b5965b159f 100755
--- a/configure
+++ b/configure
@@ -3991,18 +3991,11 @@ cat > $TMPC << EOF
 int main(void)
 {
   uint64_t x = 0, y = 0;
-#ifdef __ATOMIC_RELAXED
   y = __atomic_load_n(&x, __ATOMIC_RELAXED);
   __atomic_store_n(&x, y, __ATOMIC_RELAXED);
   __atomic_compare_exchange_n(&x, &y, x, 0, __ATOMIC_RELAXED, __ATOMIC_RELAXED);
   __atomic_exchange_n(&x, y, __ATOMIC_RELAXED);
   __atomic_fetch_add(&x, y, __ATOMIC_RELAXED);
-#else
-  typedef char is_host64[sizeof(void *) >= sizeof(uint64_t) ? 1 : -1];
-  __sync_lock_test_and_set(&x, y);
-  __sync_val_compare_and_swap(&x, y, 0);
-  __sync_fetch_and_add(&x, y);
-#endif
   return 0;
 }
 EOF