From 93df3010482ad52e5ada2e416c996005da956e1e Mon Sep 17 00:00:00 2001
From: Masaki Matsushita <glass.saga@gmail.com>
Date: Sat, 29 Aug 2020 15:38:07 +0900
Subject: IO.copy_stream: handle ENOTSUP on copy_file_range(2)

fallback to other methods on ENOTSUP.
some RedHat kernels may return ENOTSUP on an NFS mount.
[Feature #16965]
---
 io.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/io.c b/io.c
index 5e4fdd5d95..3b3ce3ff82 100644
--- a/io.c
+++ b/io.c
@@ -11311,6 +11311,11 @@ nogvl_copy_stream_sendfile(struct copy_stream_struct *stp)
 	  case EINVAL:
 #ifdef ENOSYS
 	  case ENOSYS:
+#endif
+#ifdef ENOTSUP
+	  /* some RedHat kernels may return ENOTSUP on an NFS mount.
+	     see also: [Feature #16965] */
+	  case ENOTSUP:
 #endif
             return 0;
 	  case EAGAIN:
-- 
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