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To support atomic pointers, more xchg helpers will be introduced, hence define macros to generate these helpers to ease the introduction of the future helpers. Signed-off-by: Boqun Feng <boqun.feng@gmail.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://patch.msgid.link/20260117122243.24404-3-boqun.feng@gmail.com Link: https://patch.msgid.link/20260303201701.12204-5-boqun@kernel.org