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[76.210.143.223]) by smtp.gmail.com with ESMTPSA id q20sm3875614pfn.111.2020.07.09.15.06.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 09 Jul 2020 15:06:42 -0700 (PDT) Date: Thu, 09 Jul 2020 15:06:42 -0700 (PDT) X-Google-Original-Date: Thu, 09 Jul 2020 14:48:00 PDT (-0700) Subject: Re: [PATCH V2 0/3] riscv: Enable LOCKDEP In-Reply-To: <1593266228-61125-1-git-send-email-guoren@kernel.org> CC: Paul Walmsley , anup@brainfault.org, greentime.hu@sifive.com, zong.li@sifive.com, aou@eecs.berkeley.edu, tglx@linutronix.de, tycho@tycho.ws, nickhu@andestech.com, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, linux-csky@vger.kernel.org, guoren@linux.alibaba.com From: Palmer Dabbelt To: guoren@kernel.org Message-ID: Mime-Version: 1.0 (MHng) Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Sender: linux-csky-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-csky@vger.kernel.org On Sat, 27 Jun 2020 06:57:05 PDT (-0700), guoren@kernel.org wrote: > From: Guo Ren > > 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!