linux-kernel - Re: [PATCH 11/26] ARM: pxa: allow building palm27x without pxafb

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Date:	Fri, 7 Oct 2011 14:19:01 +0800
From:	Eric Miao <eric.y.miao@...il.com>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	Russell King - ARM Linux <linux@....linux.org.uk>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Jason Chagas <jason.chagas@...vell.com>,
	Haojian Zhuang <haojian.zhuang@...vell.com>,
	Marek Vasut <marek.vasut@...il.com>
Subject: Re: [PATCH 11/26] ARM: pxa: allow building palm27x without pxafb

On Sun, Oct 2, 2011 at 4:03 AM, Arnd Bergmann <arnd@...db.de> wrote:
> The frame buffer device is defined conditionally on whether the
> driver is configured. However, the #ifdef guard around the
> declaration of palm27x_lcd_init also removes the visibility
> of the lcd mode declarations, which need to be available in
> order to build correctly, even if they are not defined in the
> end.
>
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> ---
>  arch/arm/mach-pxa/include/mach/palm27x.h |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/arch/arm/mach-pxa/include/mach/palm27x.h b/arch/arm/mach-pxa/include/mach/palm27x.h
> index 0a5e5ea..030a916 100644
> --- a/arch/arm/mach-pxa/include/mach/palm27x.h
> +++ b/arch/arm/mach-pxa/include/mach/palm27x.h
> @@ -27,10 +27,10 @@ extern void __init palm27x_pm_init(unsigned long str_base);
>  static inline void palm27x_pm_init(unsigned long str_base) {}
>  #endif
>
> -#if defined(CONFIG_FB_PXA) || defined(CONFIG_FB_PXA_MODULE)
>  extern struct pxafb_mode_info palm_320x480_lcd_mode;
>  extern struct pxafb_mode_info palm_320x320_lcd_mode;
>  extern struct pxafb_mode_info palm_320x320_new_lcd_mode;
> +#if defined(CONFIG_FB_PXA) || defined(CONFIG_FB_PXA_MODULE)
>  extern void __init palm27x_lcd_init(int power,
>                                        struct pxafb_mode_info *mode);
>  #else
> --
> 1.7.5.4

Marek and I actually came up with a patch to fix this as below, this
way to cover the declarations of those modes in the CONFIG_FB_PXA
as well.

commit e227e88ae46e921f608b056e27e1d8704b7d12fa
Author: Eric Miao <eric.y.miao@...il.com>
Date:   Sun Sep 11 16:56:58 2011 +0800

    ARM: pxa: fix building error by palm27x_lcd_init() when FB_PXA not defined

    Cc: Marek Vasut <marek.vasut@...il.com>
    Signed-off-by: Eric Miao <eric.y.miao@...il.com>

diff --git a/arch/arm/mach-pxa/include/mach/palm27x.h
b/arch/arm/mach-pxa/include/mach/palm27x.h
index 0a5e5ea..f80bbe2 100644
--- a/arch/arm/mach-pxa/include/mach/palm27x.h
+++ b/arch/arm/mach-pxa/include/mach/palm27x.h
@@ -34,7 +34,7 @@ extern struct pxafb_mode_info palm_320x320_new_lcd_mode;
 extern void __init palm27x_lcd_init(int power,
 					struct pxafb_mode_info *mode);
 #else
-static inline void palm27x_lcd_init(int power, struct pxafb_mode_info *mode) {}
+#define palm27x_lcd_init(power, mode)	do {} while (0)
 #endif

 #if	defined(CONFIG_USB_GADGET_PXA27X) || \

>
>
--
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