From: "Suresh E. Warrier" <warrier@xxxxxxxxxxxxxxxxxx> Export __spin_yield so that the arch_spin_unlock() function can be invoked from a module. This will be required for modules where we want to take a lock that is also is acquired in hypervisor real mode. Because we want to avoid running any lockdep code (which may not be safe in real mode), this lock needs to be an arch_spinlock_t instead of a normal spinlock. Signed-off-by: Suresh Warrier <warrier@xxxxxxxxxxxxxxxxxx> Acked-by: Paul Mackerras <paulus@xxxxxxxxx> Acked-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx> Signed-off-by: Alexander Graf <agraf@xxxxxxx> --- arch/powerpc/lib/locks.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/powerpc/lib/locks.c b/arch/powerpc/lib/locks.c index 170a034..f7deebd 100644 --- a/arch/powerpc/lib/locks.c +++ b/arch/powerpc/lib/locks.c @@ -41,6 +41,7 @@ void __spin_yield(arch_spinlock_t *lock) plpar_hcall_norets(H_CONFER, get_hard_smp_processor_id(holder_cpu), yield_count); } +EXPORT_SYMBOL_GPL(__spin_yield); /* * Waiting for a read lock or a write lock on a rwlock... -- 1.8.1.4 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
