Now we have pci_root_buses list, and there is lots of iteration with list_of_each of it, that is not safe after we add pci root bus hotplug support after booting stage.
Add pci_get_next_host_bridge and use bus_find_device in driver core to iterate host bridge and the same time get root bus.
We replace searching root bus with searching host_bridge, as host_bridge->bus is the root bus. After those replacing, we even could kill pci_root_buses list.
based on pci/next
could get from git://git.kernel.org/pub/scm/linux/kernel/git/yinghai/linux-yinghai.git for-pci-for-each-host-bridge
-v2: updated after pci_root_bus_hotplug get into pci/next -v3: update changelog and add cc for pci core change for arch guys.
Cc: Mauro Carvalho Chehab mchehab@redhat.com Cc: Doug Thompson dougthompson@xmission.com Cc: linux-edac@vger.kernel.org Cc: x86@kernel.org Cc: David Airlie airlied@linux.ie Cc: dri-devel@lists.freedesktop.org Cc: "David S. Miller" davem@davemloft.net Cc: sparclinux@vger.kernel.org Cc: Tony Luck tony.luck@intel.com Cc: Fenghua Yu fenghua.yu@intel.com Cc: linux-ia64@vger.kernel.org Cc: linux-altix@sgi.com Cc: Richard Henderson rth@twiddle.net Cc: Ivan Kokshaysky ink@jurassic.park.msu.ru Cc: Matt Turner mattst88@gmail.com Cc: linux-alpha@vger.kernel.org Cc: Russell King linux@arm.linux.org.uk Cc: linux-arm-kernel@lists.infradead.org Cc: David Howells dhowells@redhat.com Cc: Michal Simek monstr@monstr.eu Cc: microblaze-uclinux@itee.uq.edu.au Cc: Koichi Yasutake yasutake.koichi@jp.panasonic.com Cc: linux-am33-list@redhat.com Cc: Benjamin Herrenschmidt benh@kernel.crashing.org Cc: Paul Mackerras paulus@samba.org Cc: linuxppc-dev@lists.ozlabs.org
Yinghai Lu (22): PCI: Rename pci_release_bus_bridge_dev to pci_release_host_bridge_dev PCI: Add dummy bus_type for pci_host_bridge PCI, libata: remove find_bridge in acpi_bus_type PCI, ACPI: Update comments for find_bridge in acpi_bus_type PCI: Add for_each_pci_host_bridge() and pci_get_next_host_bridge PCI, hotplug: Kill pci_find_next_bus in sgi_hotplug PCI: Kill pci_find_next_bus in pci_sysfs PCI, edac: Kill pci_find_next_bus in edac PCI, x86: Kill pci_find_next_bus in pcibios_scan_root PCI, x86: Kill pci_root_buses in resources reservations PCI, drm: Kill pci_root_buses in alpha hose setting PCI: Kill pci_root_buses in setup-bus PCI, sparc: Kill pci_find_next_bus PCI, ia64: Kill pci_find_next_bus PCI, alpha: Kill pci_root_buses PCI, arm: Kill pci_root_buses PCI, frv: Kill pci_root_buses in resources reservations PCI, microblaze: Kill pci_root_buses in resources reservations PCI, mn10300: Kill pci_root_buses in resources reservations PCI, powerpc: Kill pci_root_buses in resources reservations PCI: Kill pci_find_next_bus PCI: Kill pci_root_buses
arch/alpha/kernel/pci.c | 6 +-- arch/arm/kernel/bios32.c | 9 ++--- arch/frv/mb93090-mb00/pci-frv.c | 37 +++++++++--------- arch/ia64/hp/common/sba_iommu.c | 7 ++-- arch/ia64/sn/kernel/io_common.c | 5 ++- arch/microblaze/pci/pci-common.c | 10 ++--- arch/mn10300/unit-asb2305/pci-asb2305.c | 62 ++++++++++++++++--------------- arch/powerpc/kernel/pci-common.c | 13 +++---- arch/powerpc/kernel/pci_64.c | 8 ++-- arch/sparc/kernel/pci.c | 6 ++- arch/x86/pci/common.c | 9 +++-- arch/x86/pci/i386.c | 20 +++++----- drivers/ata/libata-acpi.c | 6 --- drivers/edac/i7core_edac.c | 6 +-- drivers/gpu/drm/drm_fops.c | 10 +++-- drivers/pci/hotplug/sgi_hotplug.c | 6 ++- drivers/pci/pci-driver.c | 11 +++++- drivers/pci/pci-sysfs.c | 6 +-- drivers/pci/probe.c | 13 ++----- drivers/pci/search.c | 61 +++++++++++++++--------------- drivers/pci/setup-bus.c | 24 ++++++------ include/acpi/acpi_bus.h | 2 +- include/linux/pci.h | 18 +++++---- 23 files changed, 187 insertions(+), 168 deletions(-)