This patch is a downstream-only variant of this upstream commit:

commit 45b1e17e9150dbd9ac2d578579063fbfa8e1b327
Author: Szabolcs Nagy <szabolcs.nagy@arm.com>
Date:   Thu Dec 17 10:03:05 2020 +0000

    aarch64: use PTR_ARG and SIZE_ARG instead of DELOUSE
    
    DELOUSE was added to asm code to make them compatible with non-LP64
    ABIs, but it is an unfortunate name and the code was not compatible
    with ABIs where pointer and size_t are different. Glibc currently
    only supports the LP64 ABI so these macros are not really needed or
    tested, but for now the name is changed to be more meaningful instead
    of removing them completely.
    
    Some DELOUSE macros were dropped: clone, strlen and strnlen used it
    unnecessarily.
    
    The out of tree ILP32 patches are currently not maintained and will
    likely need a rework to rebase them on top of the time64 changes.

Keeping the DELOUSE macro avoids the need to update all string
functions.  Lack of BTI markers and architecture variants cause many
conflicts in a full upstream backport.

diff --git a/sysdeps/aarch64/sysdep.h b/sysdeps/aarch64/sysdep.h
index 5b30709436d3acea..1bcf15d4f18586ba 100644
--- a/sysdeps/aarch64/sysdep.h
+++ b/sysdeps/aarch64/sysdep.h
@@ -32,6 +32,8 @@
 # define PTR_LOG_SIZE		2
 # define DELOUSE(n)		mov     w##n, w##n
 #endif
+#define PTR_ARG(n) DELOUSE(n)
+#define SIZE_ARG(n) DELOUSE(n)
 
 #define PTR_SIZE	(1<<PTR_LOG_SIZE)