1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index 765fd1c56cd..fb1be7b5dbc 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -694,6 +694,12 @@ void __init acpi_early_init(void)
         if (!acpi_strict)
                 acpi_gbl_enable_interpreter_slack = TRUE;
 
+        /*
+         * Doing a zero-sized mapping will clear out the previous
+         * __acpi_map_table() mapping, if any.
+         */
+        __acpi_map_table(0, 0);
+
         acpi_gbl_permanent_mmap = 1;
 
         status = acpi_reallocate_root_table();