CVSROOT: /cvs
Module name: src
Changes by: [email protected] 2022/02/10 03:15:35
Modified files:
sys/uvm : uvm_map.c uvm_map.h uvm_fault.c
Log message:
Assert vm map locks
Introduce vm_map_assert_{wrlock,rdlock,anylock,unlocked}() in rwlock(9)
fashion and back up function comments about locking assumptions with proper
assertions.
Also add new comments/assertions based on code analysis and sync with
NetBSD as much as possible.
vm_map_lock() and vm_map_lock_read() are used for exclusive and shared
access respectively; currently no code path is purely protected by
vm_map_lock_read() alone, i.e. functions called with a read lock held by the
callee are also called with a write lock elsewhere.
Thus only vm_map_assert_{wrlock,anylock}() are used as of now.
This should help with unlocking UVM related syscalls
Tested as part of a larger diff through
- amd64 package bulk build by naddy
- amd64, arm64, powerpc64 base builds and regress by bluhm
- amd64 and sparc64 base builds and regress by me
Input mpi
Feedback OK kettenis
