arch/csky patches for 5.1-rc7 Here are the patches which made on 5.1-rc6 and all are tested in our buildroot gitlab CI: https://gitlab.com/c-sky/buildroot/pipelines/57892579 - Fixup vdsp&fpu issues in kernel - Add dynamic function tracer - Use in_syscall & forget_syscall instead of r11_sig - Reconstruct signal processing - Support dynamic start physical address - Fixup wrong update_mmu_cache implementation - Support vmlinux bootup with MMU off - Use va_pa_offset instead of phys_offset - Fixup syscall_trace return processing flow - Add perf callchain support - Add perf_arch_fetch_caller_regs support - Add page fault perf event support - Add support for perf registers sampling