Re: [PATCH 1/5] ACPI: remove ACPI debugfs out of drivers/acpi/debug.c

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On Fri, 11 Jun 2010, Zhang Rui wrote:

> ACPI debugfs I/F should not depend on CONFIG_ACPI_DEBUG.

It would be good to state how much size you are adding to ACPI here --
since it will be an additional size burnden to those not already
shipping with CONFIG_ACPI_DEBUG=y.

> Introduce driver/acpi/debugfs.c for ACPI debugfs I/F.
> 
> No function change in this patch.
> 
> Signed-off-by: Zhang Rui <rui.zhang@xxxxxxxxx>
> ---
>  drivers/acpi/Makefile   |    1 
>  drivers/acpi/bus.c      |    1 
>  drivers/acpi/debug.c    |   75 ---------------------------------------------
>  drivers/acpi/debugfs.c  |   80 ++++++++++++++++++++++++++++++++++++++++++++++++
>  drivers/acpi/internal.h |    1 
>  5 files changed, 83 insertions(+), 75 deletions(-)
> 
> Index: linux-2.6/drivers/acpi/debugfs.c
> ===================================================================


> +++ linux-2.6/drivers/acpi/Makefile
> @@ -38,6 +38,7 @@ acpi-$(CONFIG_ACPI_DOCK)	+= dock.o
>  acpi-y				+= pci_root.o pci_link.o pci_irq.o pci_bind.o
>  acpi-y				+= power.o
>  acpi-y				+= system.o event.o
> +acpi-y				+= debugfs.o
>  acpi-$(CONFIG_ACPI_DEBUG)	+= debug.o

Perhaps it would make sense for this file to depend on CONFIG_DEBUG_FS
and have it cost 0-bytes when not set -- along with a static inline
for acpi_debugfs_init()?

Though honestly, with CONFIG_TRACING and others selecting it,
DEBUG_FS is probably enabled on most systems...

thanks,
-Len Brown, Intel Open Source Technology Center

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