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8c30b0018f
Supported a complete jump_label implementation based on the ARM64 and RV64 version and add the CONFIG_JUMP_LABEL=y to the defconfig. Testing was conducted using a dedicated test module jump-label-test, provided in the link below. For detailed steps, please refer to the README also at the provided link. Link: https://github.com/ChenMiaoi/GSoC-2025-Final-Report/tree/main/tests/jump-label-test Test Environment: - Hardware: QEMU emulated OR1K - Kernel Version: 6.17.0-rc3-dirty - Configs: CONFIG_MODULES=y,CONFIG_MODULE_UNLOAD=y - Toolchain: or1k-none-linux-musl-gcc 15.1.0 Test Results: $ insmod jump_label_test.ko [ 32.590000] Jump label performance test module loaded [ 35.250000] Normal branch time: 1241327150 ns (124 ns per iteration) [ 35.250000] Jump label (false) time: 706422700 ns (70 ns per iteration) [ 35.250000] Jump label (true) time: 708913450 ns (70 ns per iteration) $ rmmod jump_label_test.ko [ 72.210000] Jump label test module unloaded The results show approximately 43% improvement in branch performance when using jump labels compared to traditional branches. Link: https://lore.kernel.org/openrisc/aLsZ9S3X0OpKy1RM@antec/T/#u Signed-off-by: chenmiao <chenmiao.ku@gmail.com> Signed-off-by: Stafford Horne <shorne@gmail.com>
20 lines
481 B
Makefile
20 lines
481 B
Makefile
# SPDX-License-Identifier: GPL-2.0
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#
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# Makefile for the linux kernel.
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#
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always-$(KBUILD_BUILTIN) := vmlinux.lds
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obj-y := head.o setup.o or32_ksyms.o process.o dma.o \
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traps.o time.o irq.o entry.o ptrace.o signal.o \
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sys_call_table.o unwinder.o cacheinfo.o
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obj-$(CONFIG_JUMP_LABEL) += jump_label.o
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obj-$(CONFIG_SMP) += smp.o sync-timer.o
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obj-$(CONFIG_STACKTRACE) += stacktrace.o
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obj-$(CONFIG_MODULES) += module.o
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obj-$(CONFIG_OF) += prom.o
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obj-y += patching.o
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clean:
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