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SubjectRe: [PATCH v2 10/10] RFC: usb-storage: export symbols in USB_STORAGE namespace
On Tue, Aug 13, 2019 at 01:17:07PM +0100, Matthias Maennich wrote:
> Modules using these symbols are required to explicitly import the
> namespace. This patch was generated with the following steps and serves
> as a reference to use the symbol namespace feature:
>
> 1) Define DDEFAULT_SYMBOL_NAMESPACE in the corresponding Makefile
> 2) make (see warnings during modpost about missing imports)
> 3) make nsdeps
>
> Instead of a DEFAULT_SYMBOL_NAMESPACE definition, the EXPORT_SYMBOL_NS
> variants can be used to explicitly specify the namespace. The advantage
> of the method used here is that newly added symbols are automatically
> exported and existing ones are exported without touching their
> respective EXPORT_SYMBOL macro expansion.
>
> Signed-off-by: Matthias Maennich <maennich@google.com>
> ---
> drivers/usb/storage/Makefile | 2 ++
> drivers/usb/storage/alauda.c | 1 +
> drivers/usb/storage/cypress_atacb.c | 1 +
> drivers/usb/storage/datafab.c | 1 +
> drivers/usb/storage/ene_ub6250.c | 1 +
> drivers/usb/storage/freecom.c | 1 +
> drivers/usb/storage/isd200.c | 1 +
> drivers/usb/storage/jumpshot.c | 1 +
> drivers/usb/storage/karma.c | 1 +
> drivers/usb/storage/onetouch.c | 1 +
> drivers/usb/storage/realtek_cr.c | 1 +
> drivers/usb/storage/sddr09.c | 1 +
> drivers/usb/storage/sddr55.c | 1 +
> drivers/usb/storage/shuttle_usbat.c | 1 +
> drivers/usb/storage/uas.c | 1 +
> 15 files changed, 16 insertions(+)
>
> diff --git a/drivers/usb/storage/Makefile b/drivers/usb/storage/Makefile
> index a67ddcbb4e24..46635fa4a340 100644
> --- a/drivers/usb/storage/Makefile
> +++ b/drivers/usb/storage/Makefile
> @@ -8,6 +8,8 @@
>
> ccflags-y := -I $(srctree)/drivers/scsi
>
> +ccflags-y += -DDEFAULT_SYMBOL_NAMESPACE=USB_STORAGE

Wait, we have to do this for every subsystem? I thought there was a
macro we could use in the code itself for this. What changed from
earlier versions, or was this always here?

thanks,

greg k-h

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