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From: Greg KH <gregkh@linuxfoundation.org>
To: Michael Kelley <mikelley@microsoft.com>
Cc: "will@kernel.org" <will@kernel.org>,
	"ardb@kernel.org" <ardb@kernel.org>,
	"arnd@arndb.de" <arnd@arndb.de>,
	"catalin.marinas@arm.com" <catalin.marinas@arm.com>,
	"Mark.Rutland@arm.com" <Mark.Rutland@arm.com>,
	"maz@kernel.org" <maz@kernel.org>,
	"linux-arm-kernel@lists.infradead.org" 
	<linux-arm-kernel@lists.infradead.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"linux-hyperv@vger.kernel.org" <linux-hyperv@vger.kernel.org>,
	"linux-efi@vger.kernel.org" <linux-efi@vger.kernel.org>,
	"linux-arch@vger.kernel.org" <linux-arch@vger.kernel.org>,
	"wei.liu@kernel.org" <wei.liu@kernel.org>,
	vkuznets <vkuznets@redhat.com>, KY Srinivasan <kys@microsoft.com>,
	Sunil Muthuswamy <sunilmut@microsoft.com>,
	"boqun.feng@gmail.com" <boqun.feng@gmail.com>
Subject: Re: [PATCH v7 09/10] arm64: efi: Export screen_info
Date: Mon, 24 Aug 2020 19:52:29 +0200
Message-ID: <20200824175229.GA1227015@kroah.com> (raw)
In-Reply-To: <MW2PR2101MB1052C68771718B3FB47BB58BD7560@MW2PR2101MB1052.namprd21.prod.outlook.com>

On Mon, Aug 24, 2020 at 05:40:32PM +0000, Michael Kelley wrote:
> From: Greg KH <gregkh@linuxfoundation.org> Sent: Monday, August 24, 2020 10:35 AM
> > 
> > On Mon, Aug 24, 2020 at 09:46:22AM -0700, Michael Kelley wrote:
> > > The Hyper-V frame buffer driver may be built as a module, and
> > > it needs access to screen_info. So export screen_info.
> > >
> > > Signed-off-by: Michael Kelley <mikelley@microsoft.com>
> > > ---
> > >  arch/arm64/kernel/efi.c | 1 +
> > >  1 file changed, 1 insertion(+)
> > >
> > > diff --git a/arch/arm64/kernel/efi.c b/arch/arm64/kernel/efi.c
> > > index d0cf596..8ff557a 100644
> > > --- a/arch/arm64/kernel/efi.c
> > > +++ b/arch/arm64/kernel/efi.c
> > > @@ -55,6 +55,7 @@ static __init pteval_t
> > create_mapping_protection(efi_memory_desc_t *md)
> > >
> > >  /* we will fill this structure from the stub, so don't put it in .bss */
> > >  struct screen_info screen_info __section(.data);
> > > +EXPORT_SYMBOL(screen_info);
> > 
> > EXPORT_SYMBOL_GPL()?
> > 
> > I have to ask :)
> 
> It's also just EXPORT_SYMBOL(screen_info) in the x86, PowerPC, and Alpha
> architectures. I know that doesn't guarantee it's right, but I'll have to defer
> to the appropriate subsystem maintainers for whether it really should be
> EXPORT_SYMBOL_GPL.

Ok, fair enough, your original patch is fine.

thanks,

greg k-h

  reply index

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-08-24 16:46 [PATCH v7 00/10] Enable Linux guests on Hyper-V on ARM64 Michael Kelley
2020-08-24 16:46 ` [PATCH v7 01/10] arm/arm64: smccc-1.1: Add vendor specific owner definition Michael Kelley
2020-08-24 16:46 ` [PATCH v7 02/10] arm64: hyperv: Add core Hyper-V include files Michael Kelley
2020-08-24 18:38   ` Arnd Bergmann
2020-08-24 16:46 ` [PATCH v7 03/10] arm64: hyperv: Add hypercall and register access functions Michael Kelley
2020-08-24 16:46 ` [PATCH v7 04/10] arm64: hyperv: Add memory alloc/free functions for Hyper-V size pages Michael Kelley
2020-08-24 16:46 ` [PATCH v7 05/10] arm64: hyperv: Add interrupt handlers for VMbus and stimer Michael Kelley
2020-08-24 18:54   ` Arnd Bergmann
2020-08-25 22:04     ` Michael Kelley
2020-08-26  7:14       ` Arnd Bergmann
2020-08-24 16:46 ` [PATCH v7 06/10] arm64: hyperv: Add kexec and panic handlers Michael Kelley
2020-08-24 16:46 ` [PATCH v7 07/10] arm64: hyperv: Initialize hypervisor on boot Michael Kelley
2020-08-24 18:33   ` Arnd Bergmann
2020-08-25 21:20     ` Michael Kelley
2020-08-26  7:18       ` Arnd Bergmann
2020-08-24 16:46 ` [PATCH v7 08/10] Drivers: hv: vmbus: Add hooks for per-CPU IRQ Michael Kelley
2020-08-24 16:46 ` [PATCH v7 09/10] arm64: efi: Export screen_info Michael Kelley
2020-08-24 17:21   ` Ard Biesheuvel
2020-08-24 17:35   ` Greg KH
2020-08-24 17:40     ` Michael Kelley
2020-08-24 17:52       ` Greg KH [this message]
2020-08-24 16:46 ` [PATCH v7 10/10] Drivers: hv: Enable Hyper-V code to be built on ARM64 Michael Kelley
2020-08-24 17:24   ` Ard Biesheuvel
2020-08-24 17:28     ` Michael Kelley
2020-08-25  8:47     ` Ben Dooks

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