linux-kernel - [PATCH V2 16/23] x86, ia64: Include acpi_pci_{add|remove}_bus to the default pcibios_{add|remove}

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Date:	Wed, 16 Dec 2015 16:16:26 +0100
From:	Tomasz Nowicki <tn@...ihalf.com>
To:	bhelgaas@...gle.com, arnd@...db.de, will.deacon@....com,
	catalin.marinas@....com, rjw@...ysocki.net, hanjun.guo@...aro.org,
	Lorenzo.Pieralisi@....com, okaya@...eaurora.org,
	jiang.liu@...ux.intel.com, Stefano.Stabellini@...citrix.com
Cc:	robert.richter@...iumnetworks.com, mw@...ihalf.com,
	Liviu.Dudau@....com, ddaney@...iumnetworks.com, tglx@...utronix.de,
	wangyijing@...wei.com, Suravee.Suthikulpanit@....com,
	msalter@...hat.com, linux-pci@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-acpi@...r.kernel.org,
	linux-kernel@...r.kernel.org, linaro-acpi@...ts.linaro.org,
	jchandra@...adcom.com, jcm@...hat.com,
	Tomasz Nowicki <tn@...ihalf.com>
Subject: [PATCH V2 16/23] x86, ia64: Include acpi_pci_{add|remove}_bus to the default pcibios_{add|remove}_bus implementation.

Arches in subject are the only one who use pcibios_{add|remove}_bus hooks
and implement it in the same way. Moreover ARM64 is going to do the same.
So it seams that acpi_pci_{add|remove}_bus is generic enough to be default
option for pcibios_{add|remove}_bus hooks. Also, it is always safe to run
acpi_pci_{add|remove}_bus as they have empty stubs for !ACPI case and
return if ACPI has been switched off in run time.

After all we can remove x86 and ia64 pcibios_{add|remove}_bus
implementation.

Signed-off-by: Tomasz Nowicki <tn@...ihalf.com>
---
 arch/ia64/pci/pci.c   | 10 ----------
 arch/x86/pci/common.c | 10 ----------
 drivers/pci/probe.c   |  3 +++
 3 files changed, 3 insertions(+), 20 deletions(-)

diff --git a/arch/ia64/pci/pci.c b/arch/ia64/pci/pci.c
index fe96bc9..c1e8ed5 100644
--- a/arch/ia64/pci/pci.c
+++ b/arch/ia64/pci/pci.c
@@ -357,16 +357,6 @@ void pcibios_fixup_bus(struct pci_bus *b)
 	platform_pci_fixup_bus(b);
 }
 
-void pcibios_add_bus(struct pci_bus *bus)
-{
-	acpi_pci_add_bus(bus);
-}
-
-void pcibios_remove_bus(struct pci_bus *bus)
-{
-	acpi_pci_remove_bus(bus);
-}
-
 void pcibios_set_master (struct pci_dev *dev)
 {
 	/* No special bus mastering setup handling */
diff --git a/arch/x86/pci/common.c b/arch/x86/pci/common.c
index eccd4d9..ed3236d 100644
--- a/arch/x86/pci/common.c
+++ b/arch/x86/pci/common.c
@@ -171,16 +171,6 @@ void pcibios_fixup_bus(struct pci_bus *b)
 		pcibios_fixup_device_resources(dev);
 }
 
-void pcibios_add_bus(struct pci_bus *bus)
-{
-	acpi_pci_add_bus(bus);
-}
-
-void pcibios_remove_bus(struct pci_bus *bus)
-{
-	acpi_pci_remove_bus(bus);
-}
-
 /*
  * Only use DMI information to set this if nothing was passed
  * on the kernel command line (which was parsed earlier).
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index cad836f..2fbf840 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -12,6 +12,7 @@
 #include <linux/slab.h>
 #include <linux/module.h>
 #include <linux/cpumask.h>
+#include <linux/pci-acpi.h>
 #include <linux/pci-aspm.h>
 #include <linux/aer.h>
 #include <linux/acpi.h>
@@ -2067,10 +2068,12 @@ int __weak pcibios_root_bridge_prepare(struct pci_host_bridge *bridge)
 
 void __weak pcibios_add_bus(struct pci_bus *bus)
 {
+	acpi_pci_add_bus(bus);
 }
 
 void __weak pcibios_remove_bus(struct pci_bus *bus)
 {
+	acpi_pci_remove_bus(bus);
 }
 
 struct pci_bus *pci_create_root_bus(struct device *parent, int bus,
-- 
1.9.1

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