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SubjectRe: [PATCH V2 0/3] riscv: Enable LOCKDEP
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On Sat, 27 Jun 2020 06:57:05 PDT (-0700), guoren@kernel.org wrote:
> From: Guo Ren <guoren@linux.alibaba.com>
>
> 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!

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