xtensa: nommu: select HAVE_FUTEX_CMPXCHG

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Not having HAVE_FUTEX_CMPXCHG makes futex_detect_cmpxchg probe
cmpxchg_futex_value_locked with NULL address. It's not guaranteed to
fault without MMU, instead it locks up on Xtensa when there's no RAM at
address 0.

Select HAVE_FUTEX_CMPXCHG in noMMU Xtensa configurations.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>

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Max Filippov 2015-09-30 15:17:35 +03:00

parent d9eb3cb248

commit d951ba21b9

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arch/xtensa/Kconfig

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