[U-Boot] [PATCH 1/3] common: add ifdefs around bouncebuf.c body

[Marek Vasut <marex@denx.de>]

Dear Stephen Warren,

> On 11/06/2012 03:43 PM, Marek Vasut wrote:
> > Dear Stephen Warren,
> > 
> >> On 11/05/2012 05:54 PM, Marek Vasut wrote:
> >>> Dear Stephen Warren,
> >>> 
> >>>> From: Stephen Warren <swarren@nvidia.com>
> >>>> 
> >>>> If a U-Boot config file enables CONFIG_BOUNCE_BUFFER only for the main
> >>>> U-Boot build and not for the SPL, then config.mk will contain
> >>>> CONFIG_BOUNCE_BUFFER=y, so common/Makefile will build bouncebuf.c for
> >>>> both the SPL and main U-Boot, but config.h won't set
> >>>> CONFIG_BOUNCE_BUFFER for the SPL, so bouncebuf.h will provide static
> >>>> inline functions, which will conflict with the compiled bouncebuf.c.
> >>>> Solve this by guarding the body of bouncebuf.c with the ifdef to avoid
> >>>> conflicts.
> >>> 
> >>> Uh, don't you want the bounce buffer not compiled in for SPL? Then
> >>> maybe add CONFIG_SPL_BOUNCE_BUFFER to force BB to be compiled into SPL
> >>> or something ...
> >> 
> >> Not compiling bouncebuf.c for SPL would solve this too. I have no idea
> >> what build system contortions would be required to do this though. Do
> >> you think the build system should be fixed first rather than taking this
> >> series/patch?
> >> 
> >> I guess we shouldn't need a separate CONFIG_SPL_BOUNCE_BUFFER option
> >> though; we should rather simply set CONFIG_SPL_BOUNCE_BUFFER
> >> appropriately for SPL and non-SPL, and have everything key off that one
> >> variable, right?
> > 
> > How will you be able to configure it separately for spl and non-spl ?
> 
> For example,
> 
> include/configs/trimslice.h contains:
> 
> /* SD/MMC */
> #define CONFIG_MMC
> #define CONFIG_GENERIC_MMC
> #define CONFIG_TEGRA_MMC
> #define CONFIG_CMD_MMC
> 
> However, we don't use MMC in our SPL, but don't want to pollute every
> Tegra board file with ifdefs for SPL, so
> include/configs/tegra-common-post.h (which is included at the end of
> trimslice.h) contains:
> 
> #ifdef CONFIG_SPL_BUILD
> ...
> /* remove MMC support */
> #ifdef CONFIG_MMC
> #undef CONFIG_MMC
> #endif
> #ifdef CONFIG_GENERIC_MMC
> #undef CONFIG_GENERIC_MMC
> #endif
> #ifdef CONFIG_TEGRA_MMC
> #undef CONFIG_TEGRA_MMC
> #endif
> #ifdef CONFIG_CMD_MMC
> #undef CONFIG_CMD_MMC
> #endif
> ...
> #endif
> 
> And in the V1 patch I proposed to tegra-common-post.h, I added the
> following at the end:
> 
> #ifdef CONFIG_TEGRA_MMC
> #define CONFIG_BOUNCE_BUFFER
> #endif

Yet, this doesn't solve the problem with SPL ... since for SPL, you'd have to do 
ifdef CONFIG_SPL, no?

Best regards,
Marek Vasut