git: b952606b4f99 - main - unionfs_lock(): eliminate LK_CANRECURSE special-case

The branch main has been updated by jah:

URL: https://cgit.FreeBSD.org/src/commit/?id=b952606b4f999d2e691a1adf02f0ef0b2b34d26c

commit b952606b4f999d2e691a1adf02f0ef0b2b34d26c
Author:     Jason A. Harmening <jah@FreeBSD.org>
AuthorDate: 2026-08-15 16:05:46 +0000
Commit:     Jason A. Harmening <jah@FreeBSD.org>
CommitDate: 2026-08-22 01:32:15 +0000

    unionfs_lock(): eliminate LK_CANRECURSE special-case
    
    As of commit 9f5c4ef328 ("dounmount(9): temporarily enable recursion
    for the covered vnode lock"), the unmount path handles recursion
    automatically, so there's no longer a need to handle this case
    in unionfs-specific code.
    
    Reviewed by:    kib, markj
    Tested by:      pho
    Differential Revision:  https://reviews.freebsd.org/D58858
---
 sys/fs/unionfs/union_vnops.c | 11 -----------
 1 file changed, 11 deletions(-)

diff --git a/sys/fs/unionfs/union_vnops.c b/sys/fs/unionfs/union_vnops.c
index cfa0f4ab768e..998ca5ea7889 100644
--- a/sys/fs/unionfs/union_vnops.c
+++ b/sys/fs/unionfs/union_vnops.c
@@ -2252,17 +2252,6 @@ unionfs_lock_restart:
 		lvp_locked = true;
 	}
 
-	/*
-	 * During unmount, the root vnode lock may be taken recursively,
-	 * because it may share the same v_vnlock field as the vnode covered by
-	 * the unionfs mount.  The covered vnode is locked across VFS_UNMOUNT(),
-	 * and the same lock may be taken recursively here during vflush()
-	 * issued by unionfs_unmount().
-	 */
-	if ((flags & LK_TYPE_MASK) == LK_EXCLUSIVE &&
-	    (vp->v_vflag & VV_ROOT) != 0)
-		flags |= LK_CANRECURSE;
-
 	vholdnz(tvp);
 	VI_UNLOCK(vp);
 	error = VOP_LOCK(tvp, flags);