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Subject[PATCH -tip] x86: cpu_debug.c prepare report if files are less or more then expected
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This will prepare the report to update cpu_debug

Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>
---
arch/x86/include/asm/cpu_debug.h | 1 +
arch/x86/kernel/cpu/cpu_debug.c | 12 ++++++++++++
2 files changed, 13 insertions(+), 0 deletions(-)
diff --git a/arch/x86/include/asm/cpu_debug.h b/arch/x86/include/asm/cpu_debug.h
index 2228020..b64da5d 100644
--- a/arch/x86/include/asm/cpu_debug.h
+++ b/arch/x86/include/asm/cpu_debug.h
@@ -187,6 +187,7 @@ enum cpu_processor_bit {
#define CPU_ALL (CPU_INTEL_ALL | CPU_AMD_ALL)

#define MAX_CPU_FILES 512
+#define MIN_CPU_FILES 10

struct cpu_private {
unsigned cpu;
diff --git a/arch/x86/kernel/cpu/cpu_debug.c b/arch/x86/kernel/cpu/cpu_debug.c
index 46e29ab..1c3ebd4 100644
--- a/arch/x86/kernel/cpu/cpu_debug.c
+++ b/arch/x86/kernel/cpu/cpu_debug.c
@@ -838,6 +838,14 @@ static int cpu_init_allreg(unsigned cpu, struct dentry *dentry)
return err;
}

+/* Send Report to maintainer if files are less or more then expected */
+static void send_report(int files, struct cpuinfo_x86 *cpui)
+{
+ pr_info("Please report \"cpu_debug files %d for %x:%x:%x:%x\" to"
+ " jaswinderrajput@gmail.com\n", files, cpui->x86_vendor,
+ cpui->x86, cpui->x86_model, cpui->x86_mask);
+}
+
static int cpu_init_cpu(void)
{
struct dentry *cpu_dentry = NULL;
@@ -861,9 +869,13 @@ static int cpu_init_cpu(void)

pr_info("cpu%d(%d) debug files %d\n",
cpu, nr_cpu_ids, per_cpu(cpu_priv_count, cpu));
+ if ((per_cpu(cpu_priv_count, cpu) < MIN_CPU_FILES) && !cpu)
+ send_report(per_cpu(cpu_priv_count, cpu), cpui);
+
if (per_cpu(cpu_priv_count, cpu) > MAX_CPU_FILES) {
pr_err("Register files count %d exceeds limit %d\n",
per_cpu(cpu_priv_count, cpu), MAX_CPU_FILES);
+ send_report(per_cpu(cpu_priv_count, cpu), cpui);
per_cpu(cpu_priv_count, cpu) = MAX_CPU_FILES;
err = -ENFILE;
}
--
1.6.0.6




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