linux-kernel - Re: [PATCH v8 05/25] char/nvram: Adopt arch_nvram

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Message-ID: <alpine.LNX.2.21.1901040844380.658@nippy.intranet>
Date:   Fri, 4 Jan 2019 09:08:13 +1100 (AEDT)
From:   Finn Thain <fthain@...egraphics.com.au>
To:     Christoph Hellwig <hch@...radead.org>
cc:     Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-kernel@...r.kernel.org, linux-m68k@...ts.linux-m68k.org,
        linuxppc-dev@...ts.ozlabs.org
Subject: Re: [PATCH v8 05/25] char/nvram: Adopt arch_nvram_ops

On Thu, 3 Jan 2019, Christoph Hellwig wrote:

> > +
> > +const struct nvram_ops arch_nvram_ops = {
> > +	.read_byte      = nvram_read_byte,
> > +	.write_byte     = nvram_write_byte,
> > +	.get_size       = nvram_get_size,
> > +};
> > +EXPORT_SYMBOL(arch_nvram_ops);
> 
> I think something this internal should always be EXPORT_SYMBOL_GPL.
> 

By "internal" do you mean "not involving interests outside of the Linux 
Foundation"? TBH, I don't know who's affected.

Anyway, this patch series is mostly refactoring. So the policy it enforces 
towards the use of arch_nvram_ops just reflects the policy already in 
place:

$ git grep -w EXPORT_SYMBOL_GPL | grep nvram
$ git grep -w EXPORT_SYMBOL | grep nvram
...
arch/powerpc/kernel/setup_32.c:EXPORT_SYMBOL(nvram_read_byte);
arch/powerpc/kernel/setup_32.c:EXPORT_SYMBOL(nvram_write_byte);
arch/powerpc/kernel/setup_32.c:EXPORT_SYMBOL(nvram_get_size);
arch/powerpc/kernel/setup_32.c:EXPORT_SYMBOL(nvram_sync);
arch/powerpc/platforms/powermac/nvram.c:EXPORT_SYMBOL(pmac_get_partition);
arch/powerpc/platforms/powermac/nvram.c:EXPORT_SYMBOL(pmac_xpram_read);
arch/powerpc/platforms/powermac/nvram.c:EXPORT_SYMBOL(pmac_xpram_write);
drivers/char/nvram.c:EXPORT_SYMBOL(__nvram_read_byte);
drivers/char/nvram.c:EXPORT_SYMBOL(nvram_read_byte);
drivers/char/nvram.c:EXPORT_SYMBOL(__nvram_write_byte);
drivers/char/nvram.c:EXPORT_SYMBOL(nvram_write_byte);
drivers/char/nvram.c:EXPORT_SYMBOL(__nvram_check_checksum);
drivers/char/nvram.c:EXPORT_SYMBOL(nvram_check_checksum);
...
$ 

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