linux-kernel - Re: [RFC PATCH 4/5] csky: ftrace: Drop duplicate implementation of arch_check_ftrace

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Message-Id: <20210610090758.dfb02db4d804ffaf319d77a5@kernel.org>
Date:   Thu, 10 Jun 2021 09:07:58 +0900
From:   Masami Hiramatsu <mhiramat@...nel.org>
To:     Punit Agrawal <punitagrawal@...il.com>
Cc:     naveen.n.rao@...ux.ibm.com, anil.s.keshavamurthy@...el.com,
        davem@...emloft.net, linux-kernel@...r.kernel.org,
        guoren@...nel.org, linux-csky@...r.kernel.org,
        Guo Ren <guoren@...ux.alibaba.com>
Subject: Re: [RFC PATCH 4/5] csky: ftrace: Drop duplicate implementation of
 arch_check_ftrace_location()

On Wed,  9 Jun 2021 19:50:18 +0900
Punit Agrawal <punitagrawal@...il.com> wrote:

> The csky specific arch_check_ftrace_location() shadows a weak
> implementation of the function in core code that offers the same
> functionality but with additional error checking.
> 
> Drop the architecture specific function as a step towards further
> cleanup in core code.
> 

Looks good to me.

Acked-by: Masami Hiramatsu <mhiramat@...nel.org>

Thank you,

> Signed-off-by: Punit Agrawal <punitagrawal@...il.com>
> Cc: Guo Ren <guoren@...ux.alibaba.com>
> ---
>  arch/csky/kernel/probes/ftrace.c | 7 -------
>  1 file changed, 7 deletions(-)
> 
> diff --git a/arch/csky/kernel/probes/ftrace.c b/arch/csky/kernel/probes/ftrace.c
> index ef2bb9bd9605..b388228abbf2 100644
> --- a/arch/csky/kernel/probes/ftrace.c
> +++ b/arch/csky/kernel/probes/ftrace.c
> @@ -2,13 +2,6 @@
>  
>  #include <linux/kprobes.h>
>  
> -int arch_check_ftrace_location(struct kprobe *p)
> -{
> -	if (ftrace_location((unsigned long)p->addr))
> -		p->flags |= KPROBE_FLAG_FTRACE;
> -	return 0;
> -}
> -
>  /* Ftrace callback handler for kprobes -- called under preepmt disabled */
>  void kprobe_ftrace_handler(unsigned long ip, unsigned long parent_ip,
>  			   struct ftrace_ops *ops, struct ftrace_regs *fregs)
> -- 
> 2.30.2
> 


-- 
Masami Hiramatsu <mhiramat@...nel.org>