1 files changed, 8 insertions, 2 deletions

diff --git a/drivers/acpi/blacklist.c b/drivers/acpi/blacklist.c
index f289fd41e77d..3ec110ce00c8 100644
--- a/drivers/acpi/blacklist.c
+++ b/drivers/acpi/blacklist.c
@@ -79,11 +79,17 @@ static int __init blacklist_by_year(void)
 {
         int year = dmi_get_year(DMI_BIOS_DATE);
         /* Doesn't exist? Likely an old system */
-        if (year == -1)
+        if (year == -1) {
+                printk(KERN_ERR PREFIX "no DMI BIOS year, "
+                        "acpi=force is required to enable ACPI\n" );
                 return 1;
+        }
         /* 0? Likely a buggy new BIOS */
-        if (year == 0)
+        if (year == 0) {
+                printk(KERN_ERR PREFIX "DMI BIOS year==0, "
+                        "assuming ACPI-capable machine\n" );
                 return 0;
+        }
         if (year < CONFIG_ACPI_BLACKLIST_YEAR) {
                 printk(KERN_ERR PREFIX "BIOS age (%d) fails cutoff (%d), "
                        "acpi=force is required to enable ACPI\n",