On Sat, 27 Jun 2020 06:57:05 PDT (-0700), guoren@xxxxxxxxxx wrote:
From: Guo Ren <guoren@xxxxxxxxxxxxxxxxx> Lockdep is needed by proving the spinlocks and rwlocks. To support it, we need to add TRACE_IRQFLAGS codes in kernel/entry.S. These patches follow Documentation/irqflags-tracing.txt. Fixup 2 bugs that block the lockdep implementation. --- Changes in v2 - Remove sX regs recovery codes which are unnecessary, because callee will handle them. Thx Greentime :) - Move "restore a0 - a7" to handle_syscall, but if _TIF_SYSCALL_WORK is set, "restore a1 - a7" is still duplicated. I prefer a C wrapper for syscall. Guo Ren (2): riscv: Fixup static_obj() fail riscv: Enable LOCKDEP_SUPPORT & fixup TRACE_IRQFLAGS_SUPPORT Zong Li (1): riscv: Fixup lockdep_assert_held with wrong param cpu_running arch/riscv/Kconfig | 3 +++ arch/riscv/kernel/entry.S | 33 ++++++++++++++++++++++++++++++++- arch/riscv/kernel/smpboot.c | 1 - arch/riscv/kernel/vmlinux.lds.S | 2 +- 4 files changed, 36 insertions(+), 3 deletions(-)
These are on for-next. As far as I can tell lockdep is working, but I'm just doing some simple boot tests. Thanks!
