riscv: fix PIO helpers and add optimized percpu ops
| From: | Yunhui Cui <cuiyunhui-AT-bytedance.com> | |
| To: | pjw-AT-kernel.org, palmer-AT-dabbelt.com, aou-AT-eecs.berkeley.edu, alex-AT-ghiti.fr, dennis-AT-kernel.org, tj-AT-kernel.org, cl-AT-gentwo.org, ast-AT-kernel.org, daniel-AT-iogearbox.net, andrii-AT-kernel.org, martin.lau-AT-linux.dev, eddyz87-AT-gmail.com, memxor-AT-gmail.com, song-AT-kernel.org, yonghong.song-AT-linux.dev, jolsa-AT-kernel.org, bjorn-AT-kernel.org, pulehui-AT-huawei.com, puranjay-AT-kernel.org, thuth-AT-redhat.com, ajones-AT-ventanamicro.com, ben.dooks-AT-codethink.co.uk, rkrcmar-AT-ventanamicro.com, cuiyunhui-AT-bytedance.com, samuel.holland-AT-sifive.com, zong.li-AT-sifive.com, conor.dooley-AT-microchip.com, tglx-AT-kernel.org, debug-AT-rivosinc.com, seanwascoding-AT-gmail.com, andybnac-AT-gmail.com, menglong8.dong-AT-gmail.com, cyrilbur-AT-tenstorrent.com, wangruikang-AT-iscas.ac.cn, atishp-AT-rivosinc.com, apatel-AT-ventanamicro.com, linux-riscv-AT-lists.infradead.org, linux-kernel-AT-vger.kernel.org, linux-mm-AT-kvack.org, bpf-AT-vger.kernel.org, arnd-AT-arndb.de, nathan-AT-kernel.org, nick.desaulniers+lkml-AT-gmail.com, morbo-AT-google.com, justinstitt-AT-google.com, qingfang.deng-AT-siflower.com.cn, linux-arch-AT-vger.kernel.org, llvm-AT-lists.linux.dev | |
| Subject: | [PATCH v7 0/3] riscv: fix PIO helpers and add optimized percpu ops | |
| Date: | Thu, 02 Jul 2026 10:54:40 +0800 | |
| Message-ID: | <20260702025443.83389-1-cuiyunhui@bytedance.com> | |
| Archive-link: | Article |
Changes in v7: - Address the Sashiko comment about inconsistent AND helper naming: rename the RISC-V internal percpu helpers from andnot to and, and make all this_cpu_and_*() wrappers pass the operand directly. This is a readability cleanup only; the generated operations still implement the same plain AND semantics required by this_cpu_and(). - Undefine internal percpu helper macros prior to including <asm-generic/percpu.h> as recommended by bpf-ci/Sashiko review. This prevents macro leakage into the global namespace and has no impact on generated code or runtime behavior. Yunhui Cui (3): riscv: io: avoid null-pointer arithmetic in PIO helpers riscv: introduce percpu.h into include/asm riscv: store percpu offset into thread_info arch/riscv/include/asm/asm.h | 6 +- arch/riscv/include/asm/io.h | 8 + arch/riscv/include/asm/percpu.h | 300 +++++++++++++++++++++++++++ arch/riscv/include/asm/switch_to.h | 8 + arch/riscv/include/asm/thread_info.h | 3 +- arch/riscv/kernel/asm-offsets.c | 1 + arch/riscv/kernel/smpboot.c | 8 + arch/riscv/net/bpf_jit_comp64.c | 9 +- 8 files changed, 329 insertions(+), 14 deletions(-) create mode 100644 arch/riscv/include/asm/percpu.h -- 2.39.5