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由 David Howells 提交于
Drop support for 8-bit and 16-bit xchg and cmpxchg emulation and implements 32-bit xchg with the SWAP/SWAPI instruction. Signed-off-by: NDavid Howells <dhowells@redhat.com> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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