Function seqc_sleepable_write_begin

freebsd/sys/seqc.h:124–131

* Variant which does not critical enter/exit. */

 * Variant which does not critical enter/exit.
 */
static __inline void
seqc_sleepable_write_begin(seqc_t *seqcp)
{

	MPASS(!seqc_in_modify(*seqcp));
	*seqcp += 1;
	atomic_thread_fence_rel();
}

static __inline void
seqc_sleepable_write_end(seqc_t *seqcp)