From mboxrd@z Thu Jan 1 00:00:00 1970 From: arnd@arndb.de (Arnd Bergmann) Date: Wed, 02 Jul 2014 21:12:05 +0200 Subject: [PATCH v8 2/9] pci: Export find_pci_host_bridge() function. In-Reply-To: References: <1404240214-9804-1-git-send-email-Liviu.Dudau@arm.com> <1404240214-9804-3-git-send-email-Liviu.Dudau@arm.com> Message-ID: <7101568.8DVJFku5jp@wuerfel> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Wednesday 02 July 2014 11:06:38 Tanmay Inamdar wrote: > On Tue, Jul 1, 2014 at 11:43 AM, Liviu Dudau wrote: > > This is a useful function and we should make it visible outside the > > generic PCI code. Export it as a GPL symbol. > > > > Signed-off-by: Liviu Dudau > > Tested-by: Tanmay Inamdar > > --- > > drivers/pci/host-bridge.c | 3 ++- > > 1 file changed, 2 insertions(+), 1 deletion(-) > > > > diff --git a/drivers/pci/host-bridge.c b/drivers/pci/host-bridge.c > > index 0e5f3c9..36c669e 100644 > > --- a/drivers/pci/host-bridge.c > > +++ b/drivers/pci/host-bridge.c > > @@ -16,12 +16,13 @@ static struct pci_bus *find_pci_root_bus(struct pci_bus *bus) > > return bus; > > } > > > > -static struct pci_host_bridge *find_pci_host_bridge(struct pci_bus *bus) > > +struct pci_host_bridge *find_pci_host_bridge(struct pci_bus *bus) > > { > > struct pci_bus *root_bus = find_pci_root_bus(bus); > > > > return to_pci_host_bridge(root_bus->bridge); > > } > > +EXPORT_SYMBOL_GPL(find_pci_host_bridge); > > Is there any specific reason behind making this symbol GPL? I think > the other functions in this file are just EXPORT_SYMBOL. Ultimately > companies which have non gpl Linux modules (nvidia) will face issue > using this API. > > The same applies to 'of_create_pci_host_bridge'. I think EXPORT_SYMBOL_GPL() is better here. The new symbols are unlikely to be used by a peripheral device driver, and PCI host controllers are already restricted by EXPORT_SYMBOL_GPL. nvidia will certainly not do a PCI host controller driver that is not upstream or not GPL-compatible. Arnd