ion: add free list size to heap debug files

Signed-off-by: Colin Cross <ccross@android.com>
[jstultz: modified patch to apply to staging directory]
Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/android/ion/ion.c

@@ -1286,6 +1286,9 @@ static int ion_debug_heap_show(struct seq_file *s, void *unused)
 	seq_printf(s, "%16.s %16u\n", "total orphaned",
 		   total_orphaned_size);
 	seq_printf(s, "%16.s %16u\n", "total ", total_size);
+	if (heap->flags & ION_HEAP_FLAG_DEFER_FREE)
+		seq_printf(s, "%16.s %16u\n", "deferred free",
+				heap->free_list_size);
 	seq_printf(s, "----------------------------------------------------\n");
 
 	if (heap->debug_show)