/usr/src/linux-headers-5.15.0-190/arch/xtensa/lib
Edit: /usr/src/linux-headers-5.15.0-190/arch/xtensa/lib/Makefile (209B)
# SPDX-License-Identifier: GPL-2.0-only
#
# Makefile for Xtensa-specific library files.
#
lib-y += memcopy.o memset.o checksum.o \
usercopy.o strncpy_user.o strnlen_user.o
lib-$(CONFIG_PCI) += pci-auto.o