linux-kernel - Re: [External] Re: [PATCH v3 3/3] arm64/ftrace: Make function graph use ftrace directly

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Message-ID: <20220322104956.42203163@gandalf.local.home>
Date:   Tue, 22 Mar 2022 10:49:56 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Chengming Zhou <zhouchengming@...edance.com>
Cc:     mark.rutland@....com, mingo@...hat.com, tglx@...utronix.de,
        catalin.marinas@....com, will@...nel.org,
        dave.hansen@...ux.intel.com, broonie@...nel.org, x86@...nel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        songmuchun@...edance.com, qirui.001@...edance.com
Subject: Re: [External] Re: [PATCH v3 3/3] arm64/ftrace: Make function graph
 use ftrace directly

On Tue, 22 Mar 2022 22:14:11 +0800
Chengming Zhou <zhouchengming@...edance.com> wrote:

> > You deleted ftrace_graph_caller above from entry-ftrace.S, if we can get
> > here with some options, wouldn't that break the build?  
> 
> The above ftrace_graph_caller deleted is only for CONFIG_DYNAMIC_FTRACE_WITH_REGS,
> and I tried using a low gcc version that doesn't select HAVE_DYNAMIC_FTRACE_WITH_REGS,
> it can build success.

OK, I didn't look too deep into this.

I don't have an issue with this patch, but it needs to go through the arm64
tree.

-- Steve