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-rw-r--r--NEWS25
1 files changed, 16 insertions, 9 deletions
diff --git a/NEWS b/NEWS
index 9086b7ed17..db1c28261e 100644
--- a/NEWS
+++ b/NEWS
@@ -9,15 +9,22 @@ Version 2.21
* The following bugs are resolved with this release:
- 6652, 10672, 12847, 12926, 13862, 14132, 14138, 14171, 14498, 15215,
- 15884, 16009, 16191, 16469, 16617, 16619, 16657, 16740, 16857, 17192,
- 17266, 17273, 17344, 17363, 17370, 17371, 17411, 17460, 17475, 17485,
- 17501, 17506, 17508, 17522, 17555, 17570, 17571, 17572, 17573, 17574,
- 17582, 17583, 17584, 17585, 17589, 17594, 17601, 17608, 17616, 17625,
- 17630, 17633, 17634, 17635, 17647, 17653, 17657, 17658, 17664, 17665,
- 17668, 17682, 17717, 17719, 17722, 17723, 17724, 17725, 17732, 17733,
- 17744, 17745, 17746, 17747, 17748, 17775, 17777, 17780, 17781, 17782,
- 17791, 17793, 17796, 17797, 17803, 17806, 17834, 17844, 17848
+ 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
+ 15215, 15884, 16009, 16191, 16469, 16617, 16619, 16657, 16740, 16857,
+ 17192, 17266, 17273, 17344, 17363, 17370, 17371, 17411, 17460, 17475,
+ 17485, 17501, 17506, 17508, 17522, 17555, 17570, 17571, 17572, 17573,
+ 17574, 17582, 17583, 17584, 17585, 17589, 17594, 17601, 17608, 17616,
+ 17625, 17630, 17633, 17634, 17635, 17647, 17653, 17657, 17658, 17664,
+ 17665, 17668, 17682, 17717, 17719, 17722, 17723, 17724, 17725, 17732,
+ 17733, 17744, 17745, 17746, 17747, 17748, 17775, 17777, 17780, 17781,
+ 17782, 17791, 17793, 17796, 17797, 17803, 17806, 17834, 17844, 17848
+
+* A new semaphore algorithm has been implemented in generic C code for all
+ machines. Previous custom assembly implementations of semaphore were
+ difficult to reason about or ensure that they were safe. The new version
+ of semaphore supports machines with 64-bit or 32-bit atomic operations.
+ The new semaphore algorithm is used by sem_init, sem_open, sem_post,
+ sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
* Port to Altera Nios II has been contributed by Mentor Graphics.