Messages in this thread | | | From | guoren@kernel ... | Subject | [PATCH V2 0/3] riscv: Enable LOCKDEP | Date | Sat, 27 Jun 2020 13:57:05 +0000 |
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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(-)
-- 2.7.4
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