Documentation/locking/seqlock.rst

17 read side critical section is even and the same sequence count value is
19 be copied out inside the read side critical section. If the sequence
26 the end of the write side critical section the sequence count becomes
29 A sequence counter write side critical section must never be preempted
30 or interrupted by read side sections. Otherwise the reader will spin for
45 multiple writers.  Write side critical sections must thus be serialized
50 write side section. If the read section can be invoked from hardirq or
78 	/* ... [[write-side critical section]] ... */
87 		/* ... [[read-side critical section]] ... */
97 As discussed at :ref:`seqcount_t`, sequence count write side critical
101 side critical sections are properly serialized.
106 injected at the beginning of the write side critical section to validate
110 protection is enforced in the write side function.
152 read path to safely interrupt its own write side critical section.
154 Use seqcount_latch_t when the write side sections cannot be protected
156 side can be invoked from NMI handlers.
169 If the read side section can be invoked from hardirq or softirq context,
170 use the write side function variants which disable interrupts or bottom
191 	/* ... [[write-side critical section]] ... */
204 		/* ... [[read-side critical section]] ... */
215 	/* ... [[read-side critical section]] ... */
233 		/* ... [[read-side critical section]] ... */