linux-kernel - Re: [PATCH v2 1/2] Staging: comedi: introduce {outl,inl}_amcc() and {outl,inl}_iobase() helper functions in hwdrv

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Date:	Mon, 3 Mar 2014 12:27:55 +0300
From:	Dan Carpenter <dan.carpenter@...cle.com>
To:	Chase Southwood <chase.southwood@...oo.com>
Cc:	gregkh@...uxfoundation.org, abbotti@....co.uk,
	hsweeten@...ionengravers.com, devel@...verdev.osuosl.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/2] Staging: comedi: introduce {outl,inl}_amcc() and
 {outl,inl}_iobase() helper functions in hwdrv_apci1564.c

On Sun, Mar 02, 2014 at 08:52:19PM -0600, Chase Southwood wrote:
> This patch introduces a few simple outl and inl helper functions to allow
> several lines which violate the character limit to be shortened
> appropriately.  It also changes a few macro values which represented
> offset values from a single unique base value to instead represent the value
> of that base plus the offset.  This is to simplify the use of these macros
> in the new helper functions.
> 
> Cc: Dan Carpenter <dan.carpenter@...cle.com>
> Signed-off-by: Chase Southwood <chase.southwood@...oo.com>
> ---
> 
> All right, here's another shot at this.  Dan, I took your outl_amcc idea
> and did a version for the outl/inl calls based from devpriv->iobase as well.
> I changed all of the macros which only offset from one base value as you
> had mentioned as well, and the result is starting to look very good.
> The only outl/inl calls which still look a little gross (see PATCH v2 2/2) are
> the ones involving DIGITAL_OP_WATCHDOG, TIMER, or any of the COUNTER macros,
> just because they use a common set of offset macros so simplifying
> those calls in the same way as the rest isn't possible.  What are your
> thoughts on this version of the patchset?
> 
> This is version 2 of [PATCH 1/2] Staging: comedi: introduce outl_1564_* and
> inl_1564_* helper functions in hwdrv_apci1564.c
> 
> 2: Changed helper functions from {outl,inl}_1564_*() to
> {outl,inl}_{amcc,iobase}()
> 
> Comments welcome!
> 
>  .../comedi/drivers/addi-data/hwdrv_apci1564.c      | 38 +++++++++++++++++-----
>  1 file changed, 30 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/staging/comedi/drivers/addi-data/hwdrv_apci1564.c b/drivers/staging/comedi/drivers/addi-data/hwdrv_apci1564.c
> index 2b47fa1..58e301d 100644
> --- a/drivers/staging/comedi/drivers/addi-data/hwdrv_apci1564.c
> +++ b/drivers/staging/comedi/drivers/addi-data/hwdrv_apci1564.c
> @@ -49,25 +49,25 @@ This program is distributed in the hope that it will be useful, but WITHOUT ANY
>  /* DIGITAL INPUT-OUTPUT DEFINE */
>  /* Input defines */
>  #define APCI1564_DIGITAL_IP				0x04
> -#define APCI1564_DIGITAL_IP_INTERRUPT_MODE1		4
> -#define APCI1564_DIGITAL_IP_INTERRUPT_MODE2		8
> -#define APCI1564_DIGITAL_IP_IRQ				16
> +#define APCI1564_DIGITAL_IP_INTERRUPT_MODE1		(0x04 + 0x04)
> +#define APCI1564_DIGITAL_IP_INTERRUPT_MODE2		(0x04 + 0x08)
> +#define APCI1564_DIGITAL_IP_IRQ				(0x04 + 0x10)

You can't change these without changing the callers.  This bit needs to
be in patch 2/2.  You should probably just merge both patches anyway
because presumably this one adds some GCC warnings about unused static
functions.

regards,
dan carpenter


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