Author: mckusick
Date: Sat Dec 15 19:18:58 2018
New Revision: 342136
URL: https://svnweb.freebsd.org/changeset/base/342136
Log:
Clarify panic in set_rootvnode().
Check for panic in vfs_mountroot_shuffle().
Sponsored by: Netflix
Modified:
head/sys/kern/vfs_mountroot.c
Modified: head/sys/kern/vfs_mountroot.c
==============================================================================
--- head/sys/kern/vfs_mountroot.c Sat Dec 15 19:04:50 2018
(r342135)
+++ head/sys/kern/vfs_mountroot.c Sat Dec 15 19:18:58 2018
(r342136)
@@ -211,7 +211,7 @@ set_rootvnode(void)
struct proc *p;
if (VFS_ROOT(TAILQ_FIRST(&mountlist), LK_EXCLUSIVE, &rootvnode))
- panic("Cannot find root vnode");
+ panic("set_rootvnode: Cannot find root vnode");
VOP_UNLOCK(rootvnode, 0);
@@ -309,7 +309,8 @@ vfs_mountroot_shuffle(struct thread *td, struct mount
if (mporoot != mpdevfs)
cache_purgevfs(mpdevfs, true);
- VFS_ROOT(mporoot, LK_EXCLUSIVE, &vporoot);
+ if (VFS_ROOT(mporoot, LK_EXCLUSIVE, &vporoot))
+ panic("vfs_mountroot_shuffle: Cannot find root vnode");
VI_LOCK(vporoot);
vporoot->v_iflag &= ~VI_MOUNT;
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