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From: Marc Zyngier <maz@kernel.org>
To: Kishon Vijay Abraham I <kishon@ti.com>
Cc: Thomas Gleixner <tglx@linutronix.de>,
	Bjorn Helgaas <bhelgaas@google.com>,
	<linux-kernel@vger.kernel.org>, <linux-pci@vger.kernel.org>,
	Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
	<lokeshvutla@ti.com>
Subject: Re: [PATCH 2/3] PCI: Export find_pci_root_bus()
Date: Mon, 20 Sep 2021 09:37:01 +0100	[thread overview]
Message-ID: <874kafwslu.wl-maz@kernel.org> (raw)
In-Reply-To: <20210920064133.14115-3-kishon@ti.com>

On Mon, 20 Sep 2021 07:41:32 +0100,
Kishon Vijay Abraham I <kishon@ti.com> wrote:
> 
> Export find_pci_root_bus() in order for other subsystems (like
> IRQCHIP) to find the root bus of a particual PCIe device.
> 
> This is done in preparation for GIC ITS to walk the PCIe bus for
> calculating the total number of interrupt vectors that has to be
> supported by a specific GIC ITS device ID, specifically when
> "msi-map-mask" is populated in device tree.
> 
> Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
> ---
>  drivers/pci/host-bridge.c | 3 ++-
>  include/linux/pci.h       | 1 +
>  2 files changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/pci/host-bridge.c b/drivers/pci/host-bridge.c
> index afa50b446567..4ec34d040c02 100644
> --- a/drivers/pci/host-bridge.c
> +++ b/drivers/pci/host-bridge.c
> @@ -9,13 +9,14 @@
>  
>  #include "pci.h"
>  
> -static struct pci_bus *find_pci_root_bus(struct pci_bus *bus)
> +struct pci_bus *find_pci_root_bus(struct pci_bus *bus)
>  {
>  	while (bus->parent)
>  		bus = bus->parent;
>  
>  	return bus;
>  }
> +EXPORT_SYMBOL_GPL(find_pci_root_bus);

There is no need for this export as the ITS cannot be made modular.

	M.

-- 
Without deviation from the norm, progress is not possible.

  reply	other threads:[~2021-09-20  8:37 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-20  6:41 [PATCH 0/3] PCI/gic-v3-its: Add support for same ITS device ID for multiple PCIe devices Kishon Vijay Abraham I
2021-09-20  6:41 ` [PATCH 1/3] PCI: Add support in pci_walk_bus() to invoke callback matching RID Kishon Vijay Abraham I
2021-09-20  8:56   ` Marc Zyngier
2021-09-20 14:28     ` Kishon Vijay Abraham I
2021-09-20 18:01       ` Marc Zyngier
2021-09-22  1:26         ` Kishon Vijay Abraham I
2021-09-27 14:45           ` Marc Zyngier
2021-09-27 14:56             ` Kishon Vijay Abraham I
2021-09-20  6:41 ` [PATCH 2/3] PCI: Export find_pci_root_bus() Kishon Vijay Abraham I
2021-09-20  8:37   ` Marc Zyngier [this message]
2021-09-20  6:41 ` [PATCH 3/3] irqchip/gic-v3-its: Include "msi-map-mask" for calculating nvecs Kishon Vijay Abraham I
2021-09-20  8:36   ` Marc Zyngier
2021-09-20  9:14 ` [PATCH 0/3] PCI/gic-v3-its: Add support for same ITS device ID for multiple PCIe devices Marc Zyngier
2021-09-20 11:22   ` Kishon Vijay Abraham I
2021-09-20 11:36     ` Marc Zyngier

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