linux-kernel - Re: [PATCH] staging: ft1000: convert pack pragma to __packed_

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Date:	Mon, 22 Jun 2015 14:48:24 -0700
From:	Joe Perches <joe@...ches.com>
To:	Giedrius Statkevičius 
	<giedrius.statkevicius@...il.com>
Cc:	gregkh@...uxfoundation.org, marek.belisko@...il.com,
	tapaswenipathak@...il.com, mahfouz.saif.elyazal@...il.com,
	tinajohnson.1234@...il.com, gulsah.1004@...il.com,
	devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] staging: ft1000: convert pack pragma to __packed__
 attribute

On Mon, 2015-06-22 at 22:12 +0300, Giedrius Statkevičius wrote:
> Convert a Microsoft compiler specific directive "#pragma pack(1)" to a
> GCC equivalent __attribute__ ((__packed__)). Also, by doing this we save
> ourselves from trouble if any other struct definitions are added after
> the #pragma because it will be applied to all of the definitions
> following it.
[]
> diff --git a/drivers/staging/ft1000/ft1000-usb/ft1000_download.c b/drivers/staging/ft1000/ft1000-usb/ft1000_download.c
[]
> @@ -95,7 +95,6 @@ struct dsp_file_hdr {
>  	long              nDspImages;          /* Number of DSP images in file. */
>  };
>  
> -#pragma pack(1)
>  struct dsp_image_info {
>  	long              coff_date;           /* Date/time when DSP Coff image was built. */
>  	long              begin_offset;        /* Offset in file where image begins. */
> @@ -105,7 +104,7 @@ struct dsp_image_info {
>  	long              version;             /* Embedded version # of DSP code. */
>  	unsigned short    checksum;            /* DSP File checksum */
>  	unsigned short    pad1;
> -};
> +} __attribute__ ((__packed__));

__packed


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