4 files changed, 19 insertions, 3 deletions
diff --git a/lib/malloc/scratch_buffer.h b/lib/malloc/scratch_buffer.h
index 6efca9ba3f4..26e306212d1 100644
--- a/lib/malloc/scratch_buffer.h
+++ b/lib/malloc/scratch_buffer.h
@@ -132,4 +132,20 @@ scratch_buffer_set_array_size (struct scratch_buffer *buffer,
 			 (buffer, nelem, size));
 }
 
+/* Return a copy of *BUFFER's first SIZE bytes as a heap-allocated block,
+   deallocating *BUFFER if it was heap-allocated.  SIZE must be at
+   most *BUFFER's size.  Return NULL (setting errno) on memory
+   exhaustion.  */
+void *__libc_scratch_buffer_dupfree (struct scratch_buffer *buffer,
+                                     size_t size);
+libc_hidden_proto (__libc_scratch_buffer_dupfree)
+
+/* Alias for __libc_scratch_dupfree.  */
+static __always_inline void *
+scratch_buffer_dupfree (struct scratch_buffer *buffer, size_t size)
+{
+  void *r = __libc_scratch_buffer_dupfree (buffer, size);
+  return __glibc_likely (r != NULL) ? r : NULL;
+}
+
 #endif /* _SCRATCH_BUFFER_H */
diff --git a/lib/malloc/scratch_buffer_grow.c b/lib/malloc/scratch_buffer_grow.c
index e7606d81cd7..41befe3d65f 100644
--- a/lib/malloc/scratch_buffer_grow.c
+++ b/lib/malloc/scratch_buffer_grow.c
@@ -1,5 +1,5 @@
 /* Variable-sized buffer with on-stack default allocation.
-   Copyright (C) 2015-2021 Free Software Foundation, Inc.
+   Copyright (C) 2015-2020 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/lib/malloc/scratch_buffer_grow_preserve.c b/lib/malloc/scratch_buffer_grow_preserve.c
index 59f8c710001..aef232938d5 100644
--- a/lib/malloc/scratch_buffer_grow_preserve.c
+++ b/lib/malloc/scratch_buffer_grow_preserve.c
@@ -1,5 +1,5 @@
 /* Variable-sized buffer with on-stack default allocation.
-   Copyright (C) 2015-2021 Free Software Foundation, Inc.
+   Copyright (C) 2015-2020 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/lib/malloc/scratch_buffer_set_array_size.c b/lib/malloc/scratch_buffer_set_array_size.c
index e2b9f31211a..5f5e4c24f5a 100644
--- a/lib/malloc/scratch_buffer_set_array_size.c
+++ b/lib/malloc/scratch_buffer_set_array_size.c
@@ -1,5 +1,5 @@
 /* Variable-sized buffer with on-stack default allocation.
-   Copyright (C) 2015-2021 Free Software Foundation, Inc.
+   Copyright (C) 2015-2020 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or