fedora core 6 1.2949 + vserver 2.2.0

[linux-2.6.git] / drivers / media / dvb / dvb-core / dvbdev.h

diff --git a/drivers/media/dvb/dvb-core/dvbdev.h b/drivers/media/dvb/dvb-core/dvbdev.h
index 7a7f75f..620e788 100644 (file)
--- a/drivers/media/dvb/dvb-core/dvbdev.h
+++ b/drivers/media/dvb/dvb-core/dvbdev.h
@@ -102,4 +102,26 @@ extern int dvb_usercopy(struct inode *inode, struct file *file,
                            int (*func)(struct inode *inode, struct file *file,
                            unsigned int cmd, void *arg));
 
+/** generic DVB attach function. */
+#ifdef CONFIG_DVB_CORE_ATTACH
+#define dvb_attach(FUNCTION, ARGS...) ({ \
+       void *__r = NULL; \
+       typeof(&FUNCTION) __a = symbol_request(FUNCTION); \
+       if (__a) { \
+               __r = (void *) __a(ARGS); \
+               if (__r == NULL) \
+                       symbol_put(FUNCTION); \
+       } else { \
+               printk(KERN_ERR "DVB: Unable to find symbol "#FUNCTION"()\n"); \
+       } \
+       __r; \
+})
+
+#else
+#define dvb_attach(FUNCTION, ARGS...) ({ \
+       FUNCTION(ARGS); \
+})
+
+#endif
+
 #endif /* #ifndef _DVBDEV_H_ */