linux-kernel - Re: [PATCH] asm-generic: Add missing brackets for io_stop

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Message-ID: <YeFk9w9AFJxkZziq@arm.com>
Date:   Fri, 14 Jan 2022 11:56:39 +0000
From:   Catalin Marinas <catalin.marinas@....com>
To:     Xiongfeng Wang <wangxiongfeng2@...wei.com>
Cc:     arnd@...db.de, linux-arch@...r.kernel.org,
        linux-kernel@...r.kernel.org, huangguangbin2@...wei.com
Subject: Re: [PATCH] asm-generic: Add missing brackets for io_stop_wc macro

On Fri, Jan 14, 2022 at 06:58:57PM +0800, Xiongfeng Wang wrote:
> After using io_stop_wc(), drivers reports following compile error when
> compiled on X86.
> 
>   drivers/net/ethernet/hisilicon/hns3/hns3_enet.c: In function ‘hns3_tx_push_bd’:
>   drivers/net/ethernet/hisilicon/hns3/hns3_enet.c:2058:12: error: expected ‘;’ before ‘(’ token
>     io_stop_wc();
>               ^
> It is because I missed to add the brackets after io_stop_wc macro. So
> let's add the missing brackets.
> 
> Fixes: d5624bb29f49 ("asm-generic: introduce io_stop_wc() and add implementation for ARM64")
> Reported-by: Guangbin Huang <huangguangbin2@...wei.com>
> Signed-off-by: Xiongfeng Wang <wangxiongfeng2@...wei.com>
> ---
>  include/asm-generic/barrier.h | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/include/asm-generic/barrier.h b/include/asm-generic/barrier.h
> index 3d503e74037f..fd7e8fbaeef1 100644
> --- a/include/asm-generic/barrier.h
> +++ b/include/asm-generic/barrier.h
> @@ -285,7 +285,7 @@ do {									\
>   * write-combining memory accesses before this macro with those after it.
>   */
>  #ifndef io_stop_wc
> -#define io_stop_wc do { } while (0)
> +#define io_stop_wc() do { } while (0)

Acked-by: Catalin Marinas <catalin.marinas@....com>

Arnd, do you plan to take this fix or you'd like me to?

Thanks.

-- 
Catalin