From f4a3d9da6e1e35cf8ee8245fda55fd94d42408fd Mon Sep 17 00:00:00 2001
From: Poul-Henning Kamp <phk@FreeBSD.org>
Date: Tue, 5 Aug 2003 06:43:56 +0000
Subject: [PATCH] Only drop Giant around the drivers ->d_strategy() if the
 buffer is not marked to prevent this.

---
 sys/fs/specfs/spec_vnops.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sys/fs/specfs/spec_vnops.c b/sys/fs/specfs/spec_vnops.c
index 95947567be7..1f5ebba9134 100644
--- a/sys/fs/specfs/spec_vnops.c
+++ b/sys/fs/specfs/spec_vnops.c
@@ -504,7 +504,7 @@ spec_xstrategy(struct vnode *vp, struct buf *bp)
 	   ("No strategy on dev %s responsible for buffer %p\n",
 	   devtoname(bp->b_dev), bp));
 	
-	if (dsw->d_flags & D_NOGIANT) {
+	if ((dsw->d_flags & D_NOGIANT) && !(bp->b_flags & B_KEEPGIANT)) {
 		DROP_GIANT();
 		DEV_STRATEGY(bp);
 		PICKUP_GIANT();