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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>
This commit is contained in:
Max Filippov 2015-09-30 15:17:35 +03:00
parent d9eb3cb248
commit d951ba21b9
1 changed files with 1 additions and 0 deletions
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arch/xtensa/Kconfig
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@ -17,6 +17,7 @@ config XTENSA
select HAVE_DMA_API_DEBUG
select HAVE_DMA_ATTRS
select HAVE_FUNCTION_TRACER
select HAVE_FUTEX_CMPXCHG if !MMU
select HAVE_IRQ_TIME_ACCOUNTING
select HAVE_OPROFILE
select HAVE_PERF_EVENTS