[PATCH 2/2] locking/rwsem: Disable optimistic spinning for PA-RISC

[Davidlohr Bueso]

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@xxxxxxxxxx>
Signed-off-by: Davidlohr Bueso <davidlohr@xxxxxx>
---
 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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