[PATCH OLK-5.10 0/3] LoongArch: Optimize memory ops

Backport memory ops from upstream.

WANG Rui (2): LoongArch: Optimize memory ops (memset/memcpy/memmove) LoongArch: Fix return value underflow in exception path

Weihao Li (1): LoongArch: Adjust {copy, clear}_user exception handler behavior

arch/loongarch/lib/clear_user.S | 166 +++++++++++++++---- arch/loongarch/lib/copy_user.S | 271 +++++++++++++++++++++++++------- arch/loongarch/lib/memcpy.S | 146 ++++++++++++++--- arch/loongarch/lib/memmove.S | 120 ++++++++------ arch/loongarch/lib/memset.S | 116 +++++++++++--- 5 files changed, 631 insertions(+), 188 deletions(-)