x86, MCE, AMD: Hide interrupt_enable sysfs node

Depending on whether the box supports the APIC LVT interrupt for
thresholding, we want to show the 'interrupt_enable' sysfs node or not.
Make that the case by adding it to the default sysfs attributes only if
it is supported.

Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>

diff --git a/arch/x86/kernel/cpu/mcheck/mce_amd.c b/arch/x86/kernel/cpu/mcheck/mce_amd.c
index 2c1d178..f4873a6 100644 (file)
--- a/arch/x86/kernel/cpu/mcheck/mce_amd.c
+++ b/arch/x86/kernel/cpu/mcheck/mce_amd.c
@@ -421,10 +421,10 @@ RW_ATTR(threshold_limit);
 RW_ATTR(error_count);
 
 static struct attribute *default_attrs[] = {
-       &interrupt_enable.attr,
        &threshold_limit.attr,
        &error_count.attr,
-       NULL
+       NULL,   /* possibly interrupt_enable if supported, see below */
+       NULL,
 };
 
 #define to_block(k)    container_of(k, struct threshold_block, kobj)
@@ -501,6 +501,11 @@ static __cpuinit int allocate_threshold_blocks(unsigned int cpu,
        b->interrupt_capable    = lvt_interrupt_supported(bank, high);
        b->threshold_limit      = THRESHOLD_MAX;
 
+       if (b->interrupt_capable)
+               threshold_ktype.default_attrs[2] = &interrupt_enable.attr;
+       else
+               threshold_ktype.default_attrs[2] = NULL;
+
        INIT_LIST_HEAD(&b->miscj);
 
        if (per_cpu(threshold_banks, cpu)[bank]->blocks) {