Re: [RESEND PATCH v5 3/5] ARM: Conceal DEBUG_LL_UART_NONE from unsupported platforms

On 26/05/14 14:39, Arnd Bergmann wrote:

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diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug index eab8ecb..4c8d7db 100644 --- a/arch/arm/Kconfig.debug +++ b/arch/arm/Kconfig.debug @@ -842,7 +842,18 @@ choice config DEBUG_LL_UART_NONE bool "No low-level debugging UART"

•         depends on !ARCH_MULTIPLATFORM
  

•         depends on ARCH_AT91 || \
  

•                 ARCH_CLPS711X || \
  

•                 ARCH_FOOTBRIDGE || \
  

•                 ARCH_KS8695 || \
  

•                 ARCH_NETX || \
  

•                 ARCH_OMAP1 || \
  

•                 ARCH_SA1100 || \
  

•                 ARCH_S3C24XX || \
  

•                 ARCH_S3C64XX || \
  

•                 ARCH_S5P64X0 || \
  

•                 ARCH_S5PC100 || \
  

•                 ARCH_S5PV210
          help
            Say Y here if your platform doesn't provide a UART option
            above. This relies on your platform choosing the right UART
  

ARCH_S3C24XX has been moved over in linux-next to use debug/s3c24xx.S. A few others will likely move soon (AT91, CLPS711x, S5PV210), as the platforms get moved to ARCH_MULTIPLATFORM.

The list in my patch came from:

sundance$ find arch/arm -name "debug-macro.S" arch/arm/mach-at91/include/mach/debug-macro.S arch/arm/mach-clps711x/include/mach/debug-macro.S arch/arm/mach-footbridge/include/mach/debug-macro.S arch/arm/mach-ks8695/include/mach/debug-macro.S arch/arm/mach-netx/include/mach/debug-macro.S arch/arm/mach-omap1/include/mach/debug-macro.S arch/arm/mach-s3c64xx/include/mach/debug-macro.S arch/arm/mach-s5p64x0/include/mach/debug-macro.S arch/arm/mach-s5pc100/include/mach/debug-macro.S arch/arm/mach-s5pv210/include/mach/debug-macro.S arch/arm/mach-sa1100/include/mach/debug-macro.S

In other words this patch lists of all platforms where DEBUG_LL_UART_NONE should not result in failure to compile the kernel.

This list doesn't seem to have changed in linux-next.

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As an alternative to your patch, we could decide to move the remaining files as well.

Follow-up: I also noticed that AT91, CLPS711X, FOOTBRIDGE and all the SAMSUNG platforms already have an entry in the list, so DEBUG_LL_UART_NONE is redundant for them. The below change should be enough.

For AT91 this is actually better because the old AT91X40 support doesn't have working DEBUG_LL support. This gets handled correctly by AT91_DEBUG_LL_DBGU0/AT91_DEBUG_LL_DBGU1, but not DEBUG_LL_UART_NONE.

I'm very happy to update my patch to follow this one. However since it will render the corresponding debug-macro.S unreachable by KBuild I like to nuke the file as well. Good idea?

Daniel.