ide-cd: move lba_to_msf() and msf_to_lba() to <linux/cdrom.h>

* Move lba_to_msf() and msf_to_lba() to <linux/cdrom.h>
  (use 'u8' type instead of 'byte' while at it).

* Remove msf_to_lba() copy from drivers/cdrom/cdrom.c.

Acked-by: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

1 files changed, 14 insertions, 0 deletions

diff --git a/include/linux/cdrom.h b/include/linux/cdrom.h
index fcdc11b9609b..a5cd2047624e 100644
--- a/include/linux/cdrom.h
+++ b/include/linux/cdrom.h
@@ -1187,6 +1187,20 @@ struct media_event_desc {
 
 extern int cdrom_get_media_event(struct cdrom_device_info *cdi, struct media_event_desc *med);
 
+static inline void lba_to_msf(int lba, u8 *m, u8 *s, u8 *f)
+{
+        lba += CD_MSF_OFFSET;
+        lba &= 0xffffff;  /* negative lbas use only 24 bits */
+        *m = lba / (CD_SECS * CD_FRAMES);
+        lba %= (CD_SECS * CD_FRAMES);
+        *s = lba / CD_FRAMES;
+        *f = lba % CD_FRAMES;
+}
+
+static inline int msf_to_lba(u8 m, u8 s, u8 f)
+{
+        return (((m * CD_SECS) + s) * CD_FRAMES + f) - CD_MSF_OFFSET;
+}
 #endif  /* End of kernel only stuff */ 
 
 #endif  /* _LINUX_CDROM_H */