linux-kernel - Re: [PATCH] serial: 8250: fix a sparse warning

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Date:	Mon, 9 Mar 2015 09:22:53 +0100
From:	Greg KH <gregkh@...uxfoundation.org>
To:	Zhang Zhen <zhenzhang.zhang@...wei.com>
Cc:	linux-serial@...r.kernel.org, linux-kernel@...r.kernel.org,
	tim.kryger@...aro.org, jamie@...ieiles.com, alan@...ux.intel.com,
	arnd@...db.de
Subject: Re: [PATCH] serial: 8250: fix a sparse warning

On Mon, Mar 09, 2015 at 03:42:30PM +0800, Zhang Zhen wrote:
> drivers/tty/serial/8250/8250_core.c: In function ‘serial8250_console_write’:
> drivers/tty/serial/8250/8250_core.c:3244: warning: ‘flags’ may be used u
> unitialized in this function
> 
> Signed-off-by: Zhang Zhen <zhenzhang.zhang@...wei.com>
> ---
>  drivers/tty/serial/8250/8250_core.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/tty/serial/8250/8250_core.c b/drivers/tty/serial/8250/8250_core.c
> index deae122..50702e2 100644
> --- a/drivers/tty/serial/8250/8250_core.c
> +++ b/drivers/tty/serial/8250/8250_core.c
> @@ -3241,7 +3241,7 @@ serial8250_console_write(struct console *co, const char *s, unsigned int count)
>  {
>  	struct uart_8250_port *up = &serial8250_ports[co->index];
>  	struct uart_port *port = &up->port;
> -	unsigned long flags;
> +	unsigned long flags = 0;
>  	unsigned int ier;
>  	int locked = 1;
> 

Sparse generated this?  Or did a broken / old version of gcc?

This patch fixes nothing, sorry, so I can't accept it.

greg k-h
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