linux-kernel - Re: [Linux-fbdev-devel] [PATCH] atyfb

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Date:	Thu, 31 Jul 2008 02:15:52 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Alexander Beregalov <a.beregalov@...il.com>
Cc:	syrjala@....fi, adaplas@...il.com,
	linux-fbdev-devel@...ts.sourceforge.net,
	kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [Linux-fbdev-devel] [PATCH] atyfb_base.c: fix warning

On Thu, 31 Jul 2008 01:03:52 +0400 Alexander Beregalov <a.beregalov@...il.com> wrote:

> From: Alexander Beregalov <a.beregalov@...il.com>
> 
> atyfb_base.c: fix warning
> 
> drivers/video/aty/atyfb_base.c:2663: warning: 'aty_resume_chip' defined
> but not used
> 
> Signed-off-by: Alexander Beregalov <a.beregalov@...il.com>
> Cc: Ville Syrjala <syrjala@....fi>
> Cc: Antonino A. Daplas <adaplas@....net>
> ---
> 
>  drivers/video/aty/atyfb_base.c |    4 ++++
>  1 files changed, 4 insertions(+), 0 deletions(-)
> 
> diff --git a/drivers/video/aty/atyfb_base.c b/drivers/video/aty/atyfb_base.c
> index 620ba81..9e5dfb1 100644
> --- a/drivers/video/aty/atyfb_base.c
> +++ b/drivers/video/aty/atyfb_base.c
> @@ -244,7 +244,9 @@ static int atyfb_sync(struct fb_info *info);
>       */
>  
>  static int aty_init(struct fb_info *info);
> +#if defined(CONFIG_PM) && defined(CONFIG_PCI)
>  static void aty_resume_chip(struct fb_info *info);
> +#endif
>  #ifdef CONFIG_ATARI
>  static int store_video_par(char *videopar, unsigned char m64_num);
>  #endif
> @@ -2659,6 +2661,7 @@ aty_init_exit:
>  	return ret;
>  }
>  
> +#if defined(CONFIG_PM) && defined(CONFIG_PCI)
>  static void aty_resume_chip(struct fb_info *info)
>  {
>  	struct atyfb_par *par = info->par;
> @@ -2671,6 +2674,7 @@ static void aty_resume_chip(struct fb_info *info)
>  	if (par->aux_start)
>  		aty_st_le32(BUS_CNTL, aty_ld_le32(BUS_CNTL, par) | BUS_APER_REG_DIS, par);
>  }
> +#endif /* defined(CONFIG_PM) && defined(CONFIG_PCI) */
>  
>  #ifdef CONFIG_ATARI
>  static int __devinit store_video_par(char *video_str, unsigned char m64_num)

OK...

We don't strictly need the first ifdef - it's OK to declare a
non-existent function, and ifdefs are ugly.

But we can reorganise the code a bit more and remove the forward
declaration altogether and remove a whole ifdef block too.

How does this look?

 drivers/video/aty/atyfb_base.c |   29 +++++++++++++++--------------
 1 file changed, 15 insertions(+), 14 deletions(-)

diff -puN drivers/video/aty/atyfb_base.c~atyfb_basec-fix-warning drivers/video/aty/atyfb_base.c
--- a/drivers/video/aty/atyfb_base.c~atyfb_basec-fix-warning
+++ a/drivers/video/aty/atyfb_base.c
@@ -244,7 +244,7 @@ static int atyfb_sync(struct fb_info *in
      */
 
 static int aty_init(struct fb_info *info);
-static void aty_resume_chip(struct fb_info *info);
+
 #ifdef CONFIG_ATARI
 static int store_video_par(char *videopar, unsigned char m64_num);
 #endif
@@ -2023,6 +2023,20 @@ static int atyfb_pci_suspend(struct pci_
 	return 0;
 }
 
+static void aty_resume_chip(struct fb_info *info)
+{
+	struct atyfb_par *par = info->par;
+
+	aty_st_le32(MEM_CNTL, par->mem_cntl, par);
+
+	if (par->pll_ops->resume_pll)
+		par->pll_ops->resume_pll(info, &par->pll);
+
+	if (par->aux_start)
+		aty_st_le32(BUS_CNTL,
+			aty_ld_le32(BUS_CNTL, par) | BUS_APER_REG_DIS, par);
+}
+
 static int atyfb_pci_resume(struct pci_dev *pdev)
 {
 	struct fb_info *info = pci_get_drvdata(pdev);
@@ -2659,19 +2673,6 @@ aty_init_exit:
 	return ret;
 }
 
-static void aty_resume_chip(struct fb_info *info)
-{
-	struct atyfb_par *par = info->par;
-
-	aty_st_le32(MEM_CNTL, par->mem_cntl, par);
-
-	if (par->pll_ops->resume_pll)
-		par->pll_ops->resume_pll(info, &par->pll);
-
-	if (par->aux_start)
-		aty_st_le32(BUS_CNTL, aty_ld_le32(BUS_CNTL, par) | BUS_APER_REG_DIS, par);
-}
-
 #ifdef CONFIG_ATARI
 static int __devinit store_video_par(char *video_str, unsigned char m64_num)
 {
_

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