4 files changed, 4 insertions, 0 deletions

diff --git a/drivers/acpi/apei/erst-dbg.c b/drivers/acpi/apei/erst-dbg.c
index da1228a9a54..de73caf3ceb 100644
--- a/drivers/acpi/apei/erst-dbg.c
+++ b/drivers/acpi/apei/erst-dbg.c
@@ -184,6 +184,7 @@ static const struct file_operations erst_dbg_ops = {
         .read           = erst_dbg_read,
         .write          = erst_dbg_write,
         .unlocked_ioctl = erst_dbg_ioctl,
+        .llseek         = no_llseek,
 };
 
 static struct miscdevice erst_dbg_dev = {
diff --git a/drivers/acpi/debugfs.c b/drivers/acpi/debugfs.c
index 7de27d49c4b..6355b575ee5 100644
--- a/drivers/acpi/debugfs.c
+++ b/drivers/acpi/debugfs.c
@@ -69,6 +69,7 @@ static ssize_t cm_write(struct file *file, const char __user * user_buf,
 
 static const struct file_operations cm_fops = {
         .write = cm_write,
+        .llseek = default_llseek,
 };
 
 int __init acpi_debugfs_init(void)
diff --git a/drivers/acpi/ec_sys.c b/drivers/acpi/ec_sys.c
index 0e869b3f81c..411620ef84c 100644
--- a/drivers/acpi/ec_sys.c
+++ b/drivers/acpi/ec_sys.c
@@ -101,6 +101,7 @@ static struct file_operations acpi_ec_io_ops = {
         .open  = acpi_ec_open_io,
         .read  = acpi_ec_read_io,
         .write = acpi_ec_write_io,
+        .llseek = default_llseek,
 };
 
 int acpi_ec_add_debugfs(struct acpi_ec *ec, unsigned int ec_device_count)
diff --git a/drivers/acpi/event.c b/drivers/acpi/event.c
index d439314a75d..85d90899380 100644
--- a/drivers/acpi/event.c
+++ b/drivers/acpi/event.c
@@ -110,6 +110,7 @@ static const struct file_operations acpi_system_event_ops = {
         .read = acpi_system_read_event,
         .release = acpi_system_close_event,
         .poll = acpi_system_poll_event,
+        .llseek = default_llseek,
 };
 #endif  /* CONFIG_ACPI_PROC_EVENT */