[PATCH 1/2] powerpc/vdso64: Coarse timer support preparatory patch

[Santosh Sivaraj]

Reorganize code to make it easy to introduce CLOCK_REALTIME_COARSE and
CLOCK_MONOTONIC_COARSE timer support.

Signed-off-by: Santosh Sivaraj <santosh at fossix.org>
---
 arch/powerpc/kernel/vdso64/gettimeofday.S | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/arch/powerpc/kernel/vdso64/gettimeofday.S b/arch/powerpc/kernel/vdso64/gettimeofday.S
index 382021324883..a0b4943811db 100644
--- a/arch/powerpc/kernel/vdso64/gettimeofday.S
+++ b/arch/powerpc/kernel/vdso64/gettimeofday.S
@@ -60,18 +60,20 @@ V_FUNCTION_END(__kernel_gettimeofday)
  */
 V_FUNCTION_BEGIN(__kernel_clock_gettime)
   .cfi_startproc
+	mr	r11,r4			/* r11 saves tp */
+	mflr	r12			/* r12 saves lr */
+	lis	r7,NSEC_PER_SEC at h	/* want nanoseconds */
+	ori	r7,r7,NSEC_PER_SEC at l
+
 	/* Check for supported clock IDs */
 	cmpwi	cr0,r3,CLOCK_REALTIME
 	cmpwi	cr1,r3,CLOCK_MONOTONIC
 	cror	cr0*4+eq,cr0*4+eq,cr1*4+eq
-	bne	cr0,99f
+	beq	cr0,49f
 
-	mflr	r12			/* r12 saves lr */
+	b	99f		/* Fallback to syscall */
   .cfi_register lr,r12
-	mr	r11,r4			/* r11 saves tp */
-	bl	V_LOCAL_FUNC(__get_datapage)	/* get data page */
-	lis	r7,NSEC_PER_SEC at h	/* want nanoseconds */
-	ori	r7,r7,NSEC_PER_SEC at l
+49:	bl	V_LOCAL_FUNC(__get_datapage)	/* get data page */
 50:	bl	V_LOCAL_FUNC(__do_get_tspec)	/* get time from tb & kernel */
 	bne	cr1,80f			/* if not monotonic, all done */
 
-- 
2.13.5