[issue1459] panic in msdosfs

[Simon 'corecode' Schubert]

YONETANI Tomokazu wrote:
On Fri, Aug 21, 2009 at 12:30:30AM +0000, Alexander Polakov (via DragonFly issue tracker) wrote:
New submission from Alexander Polakov <polachok at gmail.com>:

I get a panic while trying to read a file from msdos filesystem with latest 
master.

http://omploader.org/vMjZzaw
Can you apply this patch, compile and reinstall the kernel, and
see how it it proceeds?
diff --git a/sys/kern/vfs_bio.c b/sys/kern/vfs_bio.c
index 8217817..3758510 100644
--- a/sys/kern/vfs_bio.c
+++ b/sys/kern/vfs_bio.c
@@ -887,7 +887,7 @@ breadn(struct vnode *vp, off_t loffset, int size, off_t *raoffset,
 		rabp = getblk(vp, *raoffset, *rabsize, 0, 0);
 
 		if ((rabp->b_flags & B_CACHE) == 0) {
-			rel_mplock();
+			get_mplock();
haha :)