DEFINE_LOCK_GUARD_0
DEFINE_LOCK_GUARD_0(mount_writer, write_seqlock(&mount_lock),
DEFINE_LOCK_GUARD_0(namespace_excl, namespace_lock(), namespace_unlock())
#define DEFINE_LOCK_GUARD_0(_name, _lock, _unlock, ...) \
DEFINE_LOCK_GUARD_0(preempt, preempt_disable(), preempt_enable())
DEFINE_LOCK_GUARD_0(pagefault, pagefault_disable(), pagefault_enable())
DEFINE_LOCK_GUARD_0(HARDIRQ, HARDIRQ_ENTER(), HARDIRQ_EXIT())