chao.an 1241f910ce arch/spinlock: implement the default test-and-set semantics
use the default testset implement on single core platform
that does not support test-and-set, more flexibility for
SMP drivers(using spinlock) if configured in a single-core mode.

Signed-off-by: chao.an <anchao@xiaomi.com>
2021-01-01 15:03:55 -06:00
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