diff options
Diffstat (limited to 'drivers/media/dvb/dvb-core/dvbdev.h')
| -rw-r--r-- | drivers/media/dvb/dvb-core/dvbdev.h | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/media/dvb/dvb-core/dvbdev.h b/drivers/media/dvb/dvb-core/dvbdev.h index 7a7f75fd168..620e7887b3d 100644 --- 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_ */ |