diff options
Diffstat (limited to 'linux/drivers/media/dvb/dvb-core/dvbdev.h')
| -rw-r--r-- | linux/drivers/media/dvb/dvb-core/dvbdev.h | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/linux/drivers/media/dvb/dvb-core/dvbdev.h b/linux/drivers/media/dvb/dvb-core/dvbdev.h index 1e7c036d5..1375d3a8e 100644 --- a/linux/drivers/media/dvb/dvb-core/dvbdev.h +++ b/linux/drivers/media/dvb/dvb-core/dvbdev.h @@ -103,4 +103,58 @@ extern int dvb_usercopy(struct inode *inode, struct file *file, int (*func)(struct inode *inode, struct file *file, unsigned int cmd, void *arg)); +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,17)) + +/** 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; \ +}) + +#define dvb_detach(FUNCPTR, ARGS...) ({ \ + typeof((FUNCPTR)) __funcptrtmp = FUNCPTR; \ + if (__funcptrtmp) { \ + __funcptrtmp(ARGS); \ + symbol_put_addr(__funcptrtmp); \ + } \ + FUNCPTR = NULL; \ +}) + +#else +#define dvb_attach(FUNCTION, ARGS...) ({ \ + FUNCTION(ARGS); \ +}) + +#define dvb_detach(FUNCPTR, ARGS...) \ +do { \ + if (FUNCPTR) \ + FUNCPTR(ARGS); \ + FUNCPTR = NULL; \ +} while(0) + +#endif + +#else +#define dvb_attach(FUNCTION, ARGS...) ({ \ + FUNCTION(ARGS); \ +}) + +#define dvb_detach(FUNCPTR, ARGS...) \ +do { \ + if (FUNCPTR) \ + FUNCPTR(ARGS); \ + FUNCPTR = NULL; \ +} while(0) + +#endif + #endif /* #ifndef _DVBDEV_H_ */ |