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--- orig/drivers/cdrom/cdrom.c 2004-12-07 22:55:38.000000000 -0700
+++ linux-2.6.10-rc3/drivers/cdrom/cdrom.c 2004-12-07 22:55:38.000000000 -0700
@@ -997,6 +997,10 @@
cdinfo(CD_OPEN, "entering cdrom_open\n");
+ /* If the device is opened O_EXCL but there are other openers, return busy */
+ if ( (fp->f_flags & O_EXCL) && (cdi->use_count>0) )
+ return -EBUSY;
+
/* if this was a O_NONBLOCK open and we should honor the flags,
* do a quick open without drive/disc integrity checks. */
cdi->use_count++;
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