Messages in this thread Patch in this message | | | From | Davidlohr Bueso <> | Subject | [PATCH 2/2] locking/rwsem: Disable optimistic spinning for PA-RISC | Date | Fri, 6 Jun 2014 08:55:40 -0700 |
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PA-RISC's cmpxchg is not save against normal stores and the code used for optimistic spinning is known broken because of this.
Disable for now.
[Changelog from PeterZ] Reported-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Davidlohr Bueso <davidlohr@hp.com> --- kernel/Kconfig.locks | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/Kconfig.locks b/kernel/Kconfig.locks index e4c3162..125c77a 100644 --- a/kernel/Kconfig.locks +++ b/kernel/Kconfig.locks @@ -226,7 +226,7 @@ config MUTEX_SPIN_ON_OWNER config RWSEM_SPIN_ON_OWNER def_bool y - depends on SMP && RWSEM_XCHGADD_ALGORITHM + depends on SMP && RWSEM_XCHGADD_ALGORITHM && !PARISC config ARCH_USE_QUEUE_RWLOCK bool -- 1.8.1.4
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