RAS fix for tip/x86/urgent

Hi guys,

below is a RAS fix which reverts the addition of a sysfs attribute which we agreed is not needed, post-factum. And this should go in now because that sysfs attribute is going to end up in 3.7 otherwise and thus exposed to userspace; removing it then would be a lot harder.

Thanks.

The following changes since commit c9623de4fc2f8320fe94316b46171683be3b1d59:

Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media (2012-10-18 16:10:42 -0700)

are available in the git repository at:

git://git.kernel.org/pub/scm/linux/kernel/git/ras/ras.git tags/cmci_threshold

for you to fetch changes up to 5bc66170dc486556a1e36fd384463536573f4b82:

x86, MCE: Remove bios_cmci_threshold sysfs attribute (2012-10-19 15:22:29 +0200)

----------------------------------------------------------------
Remove a useless sysfs attribute added during this merge window before it becomes a public interface.

----------------------------------------------------------------
Borislav Petkov (1):
x86, MCE: Remove bios_cmci_threshold sysfs attribute

 arch/x86/kernel/cpu/mcheck/mce.c | 6 ------
 1 file changed, 6 deletions(-)

---
Actual commit:

commit 5bc66170dc486556a1e36fd384463536573f4b82

Author: Borislav Petkov <[email protected]>
Date:   Thu Oct 18 15:10:56 2012 +0200

x86, MCE: Remove bios_cmci_threshold sysfs attribute

450cc201038f3 ("x86/mce: Provide boot argument to honour bios-set CMCI threshold") added the bios_cmci_threshold sysfs attribute which was supposed to communicate to userspace tools that BIOS CMCI threshold has been honoured.

However, this info is not of any importance to userspace - it should rather get the actual error count it has been thresholded already from MCi_STATUS[38:52].

So drop this before it becomes a used interface (good thing we caught this early in 3.7-rc1, right after the merge window closed).

index 29e87d3b2843..46cbf8689692 100644
@@ -2209,11 +2209,6 @@ static struct dev_ext_attribute dev_attr_cmci_disabled = {
        &mce_cmci_disabled
 };
 
-static struct dev_ext_attribute dev_attr_bios_cmci_threshold = {
-       __ATTR(bios_cmci_threshold, 0444, device_show_int, NULL),
-       &mce_bios_cmci_threshold
-};
-
 static struct device_attribute *mce_device_attrs[] = {
        &dev_attr_tolerant.attr,
        &dev_attr_check_interval.attr,

@@ -2222,7 +2217,6 @@ static struct device_attribute *mce_device_attrs[] = {
        &dev_attr_dont_log_ce.attr,
        &dev_attr_ignore_ce.attr,
        &dev_attr_cmci_disabled.attr,
-       &dev_attr_bios_cmci_threshold.attr,
        NULL
 };
 

Regards/Gruss,
Boris.

Advanced Micro Devices GmbH
Einsteinring 24, 85609 Dornach
GM: Alberto Bozzo
Reg: Dornach, Landkreis Muenchen
HRB Nr. 43632 WEEE Registernr: 129 19551