powerpc: use spin loop primitives in some functions
Use the different spin loop primitives in some simple powerpc
spin loops, including those which will spin as a common case.
This will help to test the spin loop primitives before more
conversions are done.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
[mpe: Add some includes of <linux/processor.h>]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
diff --git a/arch/powerpc/mm/hash_native_64.c b/arch/powerpc/mm/hash_native_64.c
index bdaac28..fbd1acc 100644
--- a/arch/powerpc/mm/hash_native_64.c
+++ b/arch/powerpc/mm/hash_native_64.c
@@ -15,6 +15,7 @@
#include <linux/spinlock.h>
#include <linux/bitops.h>
#include <linux/of.h>
+#include <linux/processor.h>
#include <linux/threads.h>
#include <linux/smp.h>
@@ -184,8 +185,10 @@ static inline void native_lock_hpte(struct hash_pte *hptep)
while (1) {
if (!test_and_set_bit_lock(HPTE_LOCK_BIT, word))
break;
+ spin_begin();
while(test_bit(HPTE_LOCK_BIT, word))
- cpu_relax();
+ spin_cpu_relax();
+ spin_end();
}
}