Summary:
- Replace direct use of `fence.i` instruction with `__ISB()` macro for instruction synchronization
- This change improves portability while maintaining the same functionality
Impact:
- No functional changes - both `fence.i` and `__ISB()` ensure instruction
synchronization on RISC-V
- Makes the code more maintainable by using the architecture abstraction
layer
Signed-off-by: Huang Qi <huangqi3@xiaomi.com>
bac2df6bc8