ACPI: Taint kernel on ACPI table override (format corrected)

When an ACPI table is overridden (for now this can happen only for DSDT)
display a big warning and taint the kernel with flag A.

Signed-off-by: Eric Piel <eric.piel@tremplin-utc.net>
Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
index 131936e7ff17..bbd8360bfb23 100644
--- a/drivers/acpi/osl.c
+++ b/drivers/acpi/osl.c
@@ -392,6 +392,13 @@ acpi_os_table_override(struct acpi_table_header * existing_table,
                         *new_table = initrd_table;
         }
 #endif
+        if (*new_table != NULL) {
+                printk(KERN_WARNING PREFIX "Override [%4.4s-%8.8s], "
+                           "this is unsafe: tainting kernel\n",
+                       existing_table->signature,
+                       existing_table->oem_table_id);
+                add_taint(TAINT_OVERRIDDEN_ACPI_TABLE);
+        }
         return AE_OK;
 }