dcdbas: export functionality for use in other drivers

The dcdbas code allows calls to be made into the firmware on Dell systems.
 Exporting this to other drivers allows them to implement Dell-specific
functionality in a safe way.

Signed-off-by: Matthew Garrett <[email protected]>
Cc: Matt Domsch <[email protected]>
Cc: Greg KH <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

Author: mjg59

drivers/firmware/dcdbas.c

@@ -238,11 +238,11 @@ static ssize_t host_control_on_shutdown_store(struct device *dev,
 }
 
 /**
- * smi_request: generate SMI request
+ * dcdbas_smi_request: generate SMI request
  *
  * Called with smi_data_lock.
  */
-static int smi_request(struct smi_cmd *smi_cmd)
+int dcdbas_smi_request(struct smi_cmd *smi_cmd)
 {
 	cpumask_t old_mask;
 	int ret = 0;
@@ -309,14 +309,14 @@ static ssize_t smi_request_store(struct device *dev,
 	switch (val) {
 	case 2:
 		/* Raw SMI */
-		ret = smi_request(smi_cmd);
+		ret = dcdbas_smi_request(smi_cmd);
 		if (!ret)
 			ret = count;
 		break;
 	case 1:
 		/* Calling Interface SMI */
 		smi_cmd->ebx = (u32) virt_to_phys(smi_cmd->command_buffer);
-		ret = smi_request(smi_cmd);
+		ret = dcdbas_smi_request(smi_cmd);
 		if (!ret)
 			ret = count;
 		break;
@@ -333,6 +333,7 @@ static ssize_t smi_request_store(struct device *dev,
 	mutex_unlock(&smi_data_lock);
 	return ret;
 }
+EXPORT_SYMBOL(dcdbas_smi_request);
 
 /**
  * host_control_smi: generate host control SMI

drivers/firmware/dcdbas.h

@@ -101,5 +101,7 @@ struct apm_cmd {
 	} __attribute__ ((packed)) parameters;
 } __attribute__ ((packed));
 
+int dcdbas_smi_request(struct smi_cmd *smi_cmd);
+
 #endif /* _DCDBAS_H_ */