Hans Petter Selasky ef24f05897 Add lock to multicast handlers in ibcore. ... When two handlers used the same object in the old schema, we blocked the process in the kernel. The new schema just returns -EBUSY. This could lead to different behaviour in applications between the old schema and the new schema. In most cases, using such handlers concurrently could lead to crashing the process. For example, if thread A destroys a QP and thread B modifies it, we could have the destruction happens before the modification. In this case, we are accessing freed memory which could lead to crashing the process. This is true for most cases. However, attaching and detaching a multicast address from QP concurrently is safe. Therefore, we preserve the original behaviour by adding a lock there. Linux commit: f48b726920d96dcd1860df06143bdea7d6d7dcc3 MFC after: 1 week Sponsored by: Mellanox Technologies		2018-07-17 08:52:29 +00:00
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drivers/infiniband	Add lock to multicast handlers in ibcore.	2018-07-17 08:52:29 +00:00
include	ifnet: Replace if_addr_lock rwlock with epoch + mutex	2018-05-18 20:13:34 +00:00