linux-kernel - Re: [PATCH v2] usb: wusbcore: Use put_unaligned

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Message-ID: <20171017095114.GA19685@kroah.com>
Date:   Tue, 17 Oct 2017 11:51:14 +0200
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Himanshu Jha <himanshujha199640@...il.com>
Cc:     bianpan2016@....com, linux-usb@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] usb: wusbcore: Use put_unaligned_le32

On Fri, Oct 06, 2017 at 08:38:07PM +0530, Himanshu Jha wrote:
> Use put_unaligned_le32 rather than using byte ordering function and
> memcpy which makes code clear.
> Also, add the header file where it is declared.
> 
> Done using Coccinelle and semantic patch used is :
> 
> @ rule1 @
> identifier tmp; expression ptr,x; type T;
> @@
> 
> - tmp = cpu_to_le32(x);
> 
>   <+... when != tmp
> - memcpy(ptr, (T)&tmp, ...);
> + put_unaligned_le32(x,ptr);
>   ...+>
> 
> @ depends on rule1 @
> type j; identifier tmp;
> @@
> 
> - j tmp;
>   ...when != tmp
> 
> Signed-off-by: Himanshu Jha <himanshujha199640@...il.com>
> ---
> v2:
> * added correct header file.
> 
>  drivers/usb/wusbcore/security.c | 9 ++++-----
>  1 file changed, 4 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/usb/wusbcore/security.c b/drivers/usb/wusbcore/security.c
> index 170f2c3..256b56f 100644
> --- a/drivers/usb/wusbcore/security.c
> +++ b/drivers/usb/wusbcore/security.c
> @@ -22,6 +22,7 @@
>   *
>   * FIXME: docs
>   */
> +#include <asm/unaligned.h>

Ick, really?  asm/ ?  As the first include?  That feels wrong, at the
very least, it needs to be at the end of the include list please.

thanks,

greg k-h