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powerpc: Avoid debug_smp_processor_id() check in SHARED_PROCESSOR 

Use local_paca directly in macro SHARED_PROCESSOR, as all processors
have the same value for the field shared_proc, so we don't need care
racy here.

Reported-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: Li Zhong <zhong@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
hifive-unleashed-5.1
Li Zhong 2013-01-24 21:51:13 +00:00 committed by Benjamin Herrenschmidt
parent 5e249d4528
commit 94c95cfbfe
1 changed files with 1 additions and 1 deletions
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2
arch/powerpc/include/asm/spinlock.h
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@ -96,7 +96,7 @@ static inline int arch_spin_trylock(arch_spinlock_t *lock)
#if defined(CONFIG_PPC_SPLPAR)
/* We only yield to the hypervisor if we are in shared processor mode */
#define SHARED_PROCESSOR (get_lppaca()->shared_proc)
#define SHARED_PROCESSOR (local_paca->lppaca_ptr->shared_proc)
extern void __spin_yield(arch_spinlock_t *lock);
extern void __rw_yield(arch_rwlock_t *lock);
#else /* SPLPAR */