From efd767d14ab8d8edfef1b54829cfb3c310b30207 Mon Sep 17 00:00:00 2001
From: Jay Zhuang <zjay@fb.com>
Date: Sat, 12 Mar 2022 22:12:18 -0800
Subject: [PATCH] Fix build for io_uring (#9690)

Summary:
Minor fix for build failure:
```
./env/io_posix.h:68:33: error: unused parameter 'len' [-Werror=unused-parameter]
   68 |                          size_t len, size_t iov_len, bool async_read,
      |                          ~~~~~~~^~~
```
Only happens for release build with io_uring.

Pull Request resolved: https://github.com/facebook/rocksdb/pull/9690

Test Plan: build pass with io_uring

Reviewed By: akankshamahajan15

Differential Revision: D34846347

Pulled By: jay-zhuang

fbshipit-source-id: 2d7afb585097262d7722ef1beac486fc8ef28419
---
 env/io_posix.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/env/io_posix.h b/env/io_posix.h
index 606e932bb..65c74758c 100644
--- a/env/io_posix.h
+++ b/env/io_posix.h
@@ -97,6 +97,9 @@ inline void UpdateResult(struct io_uring_cqe* cqe, const std::string& file_name,
                             cqe->res);
     }
   }
+#ifdef NDEBUG
+  (void)len;
+#endif
 }
 #endif