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authorGreg Kroah-Hartman <gregkh@suse.de>2008-02-13 15:06:38 -0800
committerGreg Kroah-Hartman <gregkh@suse.de>2008-04-20 21:46:58 -0700
commit1ba6ab11d8fbd8d29afec4e39236e1255ae0339a (patch)
tree68970431b31c1fd21966f567113f87d24c6c7196 /arch/frv/mb93090-mb00
parent3b57eff02c37c79e6254884d374a6a9233e11efc (diff)
downloadvexpress-lsk-1ba6ab11d8fbd8d29afec4e39236e1255ae0339a.tar.gz
PCI: remove initial bios sort of PCI devices on x86
We currently keep 2 lists of PCI devices in the system, one in the driver core, and one all on its own. This second list is sorted at boot time, in "BIOS" order, to try to remain compatible with older kernels (2.2 and earlier days). There was also a "nosort" option to turn this sorting off, to remain compatible with even older kernel versions, but that just ends up being what we have been doing from 2.5 days... Unfortunately, the second list of devices is not really ever used to determine the probing order of PCI devices or drivers[1]. That is done using the driver core list instead. This change happened back in the early 2.5 days. Relying on BIOS ording for the binding of drivers to specific device names is problematic for many reasons, and userspace tools like udev exist to properly name devices in a persistant manner if that is needed, no reliance on the BIOS is needed. Matt Domsch and others at Dell noticed this back in 2006, and added a boot option to sort the PCI device lists (both of them) in a breadth-first manner to help remain compatible with the 2.4 order, if needed for any reason. This option is not going away, as some systems rely on them. This patch removes the sorting of the internal PCI device list in "BIOS" mode, as it's not needed at all anymore, and hasn't for many years. I've also removed the PCI flags for this from some other arches that for some reason defined them, but never used them. This should not change the ordering of any drivers or device probing. [1] The old-style pci_get_device and pci_find_device() still used this sorting order, but there are very few drivers that use these functions, as they are deprecated for use in this manner. If for some reason, a driver rely on the order and uses these functions, the breadth-first boot option will resolve any problem. Cc: Matt Domsch <Matt_Domsch@dell.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'arch/frv/mb93090-mb00')
-rw-r--r--arch/frv/mb93090-mb00/pci-frv.h2
1 files changed, 0 insertions, 2 deletions
diff --git a/arch/frv/mb93090-mb00/pci-frv.h b/arch/frv/mb93090-mb00/pci-frv.h
index 7481797ab38..0c7bf39dc72 100644
--- a/arch/frv/mb93090-mb00/pci-frv.h
+++ b/arch/frv/mb93090-mb00/pci-frv.h
@@ -17,8 +17,6 @@
#define PCI_PROBE_BIOS 0x0001
#define PCI_PROBE_CONF1 0x0002
#define PCI_PROBE_CONF2 0x0004
-#define PCI_NO_SORT 0x0100
-#define PCI_BIOS_SORT 0x0200
#define PCI_NO_CHECKS 0x0400
#define PCI_ASSIGN_ROMS 0x1000
#define PCI_BIOS_IRQ_SCAN 0x2000