mnt_add_count

Name:vfsmount lock must be held for read

Proto:static inline void mnt_add_count(struct mount *mnt, int n)

Type:void

Parameter:

Type	Parameter	Name
struct mount *	mnt
int	n

150

Even if we don't have any preemption, we need preempt disable/enable* to be barriers, so that we don't have things like get_user/put_user* that can cause faults and scheduling migrate into our preempt-protected* region.()

151

152

preempt_enable()

**Caller**
Name	Describe
__legitimize_mnt	all under rcu_read_lock
mnt_set_mountpoint	vfsmount lock must be held for write
mnt_change_mountpoint
mntput_no_expire
mntget
umount_tree	mount_lock must be held* namespace_sem must be held for write
SYSCALL_DEFINE2	pivot_root Semantics:* Moves the root file system of the current process to the directory put_old,* makes new_root as the new root file system of the current process, and sets* root/cwd of all processes which had them on the current root to new_root

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