driver/char/tpm: declare internal symbols as static
This patch declares the internal struct and functions as static to provide
more security.
Signed-off-by: Xiaoyan Zhang <xiaoyan.zhang@intel.com>
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Reviewed-by: Kent Yoder <key@linux.vnet.ibm.com>
Signed-off-by: James Morris <james.l.morris@oracle.com>
diff --git a/drivers/char/tpm/tpm_ppi.c b/drivers/char/tpm/tpm_ppi.c
index 440fa1c..f27b58c 100644
--- a/drivers/char/tpm/tpm_ppi.c
+++ b/drivers/char/tpm/tpm_ppi.c
@@ -53,8 +53,8 @@
params[3].package.elements = NULL;
}
-ssize_t tpm_show_ppi_version(struct device *dev, struct device_attribute *attr,
- char *buf)
+static ssize_t tpm_show_ppi_version(struct device *dev,
+ struct device_attribute *attr, char *buf)
{
acpi_handle handle;
acpi_status status;
@@ -82,9 +82,8 @@
return status;
}
-ssize_t tpm_show_ppi_request(struct device *dev,
- struct device_attribute *attr,
- char *buf)
+static ssize_t tpm_show_ppi_request(struct device *dev,
+ struct device_attribute *attr, char *buf)
{
acpi_handle handle;
acpi_status status;
@@ -132,9 +131,9 @@
return status;
}
-ssize_t tpm_store_ppi_request(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t count)
+static ssize_t tpm_store_ppi_request(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
{
char version[PPI_VERSION_LEN + 1];
acpi_handle handle;
@@ -207,9 +206,9 @@
return status;
}
-ssize_t tpm_show_ppi_transition_action(struct device *dev,
- struct device_attribute *attr,
- char *buf)
+static ssize_t tpm_show_ppi_transition_action(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
{
char version[PPI_VERSION_LEN + 1];
acpi_handle handle;
@@ -269,9 +268,9 @@
return status;
}
-ssize_t tpm_show_ppi_response(struct device *dev,
- struct device_attribute *attr,
- char *buf)
+static ssize_t tpm_show_ppi_response(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
{
acpi_handle handle;
acpi_status status;
@@ -413,14 +412,16 @@
return str - buf;
}
-ssize_t tpm_show_ppi_tcg_operations(struct device *dev,
- struct device_attribute *attr, char *buf)
+static ssize_t tpm_show_ppi_tcg_operations(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
{
return show_ppi_operations(buf, 0, PPI_TPM_REQ_MAX);
}
-ssize_t tpm_show_ppi_vs_operations(struct device *dev,
- struct device_attribute *attr, char *buf)
+static ssize_t tpm_show_ppi_vs_operations(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
{
return show_ppi_operations(buf, PPI_VS_REQ_START, PPI_VS_REQ_END);
}