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/include/asm/delay.h b/arch/powerpc/include/asm/delay.h
index 52e4d54..3df4417 100644
--- a/arch/powerpc/include/asm/delay.h
+++ b/arch/powerpc/include/asm/delay.h
@@ -2,6 +2,7 @@
#define _ASM_POWERPC_DELAY_H
#ifdef __KERNEL__
+#include <linux/processor.h>
#include <asm/time.h>
/*
@@ -58,11 +59,18 @@ extern void udelay(unsigned long usecs);
typeof(condition) __ret; \
unsigned long __loops = tb_ticks_per_usec * timeout; \
unsigned long __start = get_tbl(); \
- while (!(__ret = (condition)) && (tb_ticks_since(__start) <= __loops)) \
- if (delay) \
+ \
+ if (delay) { \
+ while (!(__ret = (condition)) && \
+ (tb_ticks_since(__start) <= __loops)) \
udelay(delay); \
- else \
- cpu_relax(); \
+ } else { \
+ spin_begin(); \
+ while (!(__ret = (condition)) && \
+ (tb_ticks_since(__start) <= __loops)) \
+ spin_cpu_relax(); \
+ spin_end(); \
+ } \
if (!__ret) \
__ret = (condition); \
__ret; \