Feature #3399
Updated by Vladimir Gratinskiy over 11 years ago
It is necessary to use semaphore correctly. This rule checks usage of functions
up_read, down_read, up_write, down_write, down_read_trylock, down_write_trylock, downgrade_write, down_read_nested, down_write_nested.
* - multiple write locks are not permitted
- multiple write unlocks are not permitted
- multiple read locks are not permitted
- multiple read unlocks are not permitted
* - read lock is not permitted after write lock
- write lock is not permitted after read lock
* - read and write locks must be free at the end
Commit 82163edcdf on torvalds fix the last one.