linux-kernel - Re: [PATCH] x86/process: Export start

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Message-Id: <53141AE9-7192-432B-8A27-25986CF442D4@amacapital.net>
Date:   Sun, 19 Aug 2018 19:29:18 -0700
From:   Andy Lutomirski <luto@...capital.net>
To:     Rian Hunter <rian@...m.mit.edu>
Cc:     linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
        Andy Lutomirski <luto@...nel.org>,
        Borislav Petkov <bpetkov@...e.de>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Joerg Roedel <jroedel@...e.de>,
        Dmitry Safonov <dima@...sta.com>,
        Josh Poimboeuf <jpoimboe@...hat.com>
Subject: Re: [PATCH] x86/process: Export start_thread()



> On Aug 19, 2018, at 4:08 PM, Rian Hunter <rian@...m.mit.edu> wrote:
> 
> Commit e634d8fc792c ("x86-64: merge the standard and compat
> start_thread() functions") removed exporting for the start_thread()
> function in what seems like a typo. Add it back to
> arch/x86/kernel/process_64.c for parity with process_32.c and other
> arch.

What for?  Perhaps 32-bit could remove it instead?

> 
> Signed-off-by: Rian Hunter <rian@...m.mit.edu>
> ---
> arch/x86/kernel/process_64.c | 1 +
> 1 file changed, 1 insertion(+)
> 
> diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c
> index 476e3ddf8890..a451bc374b9b 100644
> --- a/arch/x86/kernel/process_64.c
> +++ b/arch/x86/kernel/process_64.c
> @@ -384,6 +384,7 @@ start_thread(struct pt_regs *regs, unsigned long new_ip, unsigned long new_sp)
>    start_thread_common(regs, new_ip, new_sp,
>                __USER_CS, __USER_DS, 0);
> }
> +EXPORT_SYMBOL_GPL(start_thread);
> 
> #ifdef CONFIG_COMPAT
> void compat_start_thread(struct pt_regs *regs, u32 new_ip, u32 new_sp)
> -- 
> 2.16.3
>