yonghong-song 06c531e808 BPF: Generate locked insn for __sync_fetch_and_add() with cpu v1/v2 (#106494) ...

This patch contains two pars:
- first to revert the patch https://github.com/llvm/llvm-project/pull/101428.
- second to remove `atomic_fetch_and_*()` to `atomic_<op>()`
  conversion (when return value is not used), but preserve 
  `__sync_fetch_and_add()` to locked insn with cpu v1/v2.

2024-08-30 14:00:33 -07:00

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