v2:
- Replace broken WRITE_ONCE(..., 9) with intended WRITE_ONCE(..., 0).
v1:
Use try_cmpxchg() instead of cmpxchg() so compilers with flag output
operand support (gcc 14 and newer) can generate slightly better code.
Also get rid of two cmpxchg() usages on one/two byte memory areas
which generates inefficient code.
bloat-o-meter statistics of the kvm module: