Gitweb: http://git.kernel.org/linus/7a04b8491a077471a34938b8ca060c37220953be
Commit: 7a04b8491a077471a34938b8ca060c37220953be
Parent: 07a2039b8eb0af4ff464efd3dfd95de5c02648c6
Author: Zhao Yakui <yakui.zhao@intel.com>
AuthorDate: Wed Jun 24 11:46:44 2009 +0800
Committer: Len Brown <len.brown@intel.com>
CommitDate: Wed Jun 24 01:18:04 2009 -0400
ACPI: Rename ACPI processor device bus ID
Some BIOS re-use the same processor bus id
in different scope:
\_SB.SCK0.CPU0
\_SB.SCK1.CPU0
But the (deprecated) /proc/acpi/ interface
assumes the bus-id's are unique, resulting in an OOPS
when the processor driver is loaded:
WARNING: at fs/proc/generic.c:590 proc_register+0x148/0x180()
Hardware name: Sunrise Ridge
proc_dir_entry 'processor/CPU0' already registered
Call Trace:
[<ffffffff8023f7ef>] warn_slowpath+0xb1/0xe5
[<ffffffff8036243b>] ? ida_get_new_above+0x190/0x1b1
[<ffffffff803625a8>] ? idr_pre_get+0x5f/0x75
[<ffffffff8030b2f6>] proc_register+0x148/0x180
[<ffffffff8030b4ff>] proc_mkdir_mode+0x3d/0x52
[<ffffffff8030b525>] proc_mkdir+0x11/0x13
[<ffffffffa0014b89>] acpi_processor_start+0x755/0x9bc [processor]
Rename the processor device bus id. And the new bus id will be
generated as the following format:
CPU+ CPU ID
For example: If the cpu ID is 5, then the bus ID will be "CPU5".
If the CPU ID is 10, then the bus ID will be "CPUA".
Yes, this will change the directory names seen
in /proc/acpi/processor/* on some systems.
Before this patch, those directory names where
totally arbitrary strings based on the interal AML device strings.
http://bugzilla.kernel.org/show_bug.cgi?id=13612
Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
---
drivers/acpi/processor_core.c | 11 ++++++++++-
1 files changed, 10 insertions(+), 1 ...
