Module Name: src
Committed By: riastradh
Date: Sun Dec 19 01:18:02 UTC 2021
Modified Files:
src/sys/external/bsd/drm2/include/linux: rcupdate.h
Log Message:
RCU pointer fixes.
- Use __typeof__, not typeof.
- Use membar_exit, not membar_producer.
=> We want a store-release, not store/store barrier.
=> Consider:
foo->x = 42;
assert(foo->x == 42);
rcu_assign_pointer(globalfoo, foo);
The foo->x load can be reordered past the store/store barrier
(membar_producer), and happen after another thread has clobbered
foo->x.
- Put the evaluation of the right-hand side before the barrier.
To generate a diff of this commit:
cvs rdiff -u -r1.8 -r1.9 src/sys/external/bsd/drm2/include/linux/rcupdate.h
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
