linux-kernel - Re: [PATCH v2] x86/boot/early_serial

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Date:	Tue, 30 Dec 2014 16:48:08 +0100
From:	Borislav Petkov <bp@...en8.de>
To:	Alexander Kuleshov <kuleshovmail@...il.com>
Cc:	"H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] x86/boot/early_serial_console: Remove unnecessary
 check

On Tue, Dec 30, 2014 at 07:28:22PM +0600, Alexander Kuleshov wrote:
> There is already the same check before.
> 
> Signed-off-by: Alexander Kuleshov <kuleshovmail@...il.com>
> ---
>  arch/x86/boot/early_serial_console.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/arch/x86/boot/early_serial_console.c b/arch/x86/boot/early_serial_console.c
> index 5df2869..62abcc8 100644
> --- a/arch/x86/boot/early_serial_console.c
> +++ b/arch/x86/boot/early_serial_console.c
> @@ -74,8 +74,7 @@ static void parse_earlyprintk(void)
>  			static const int bases[] = { 0x3f8, 0x2f8 };
>  			int idx = 0;
>  
> -			if (!strncmp(arg + pos, "ttyS", 4))
> -				pos += 4;

You might need a comment to explain the advancing of pos to people who
look at this in the future, i.e. something like

			/* += strlen("ttyS"); */
			pos += 4;
>  
>  			if (arg[pos++] == '1')
>  				idx = 1;

-- 
Regards/Gruss,
    Boris.
--
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