[PATCH 2/3] pvclock: Cleanup to remove function pvclock_get_nsec_offset

[Minfei Huang]

Function __pvclock_read_cycles is short enough, so there is no need to
have another function pvclock_get_nsec_offset to calculate tsc delta.
It's better to combine it into function __pvclock_read_cycles.

Remove useless variables in function __pvclock_read_cycles.

Signed-off-by: Minfei Huang <mngh...@gmail.com>
---
 arch/x86/include/asm/pvclock.h | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/arch/x86/include/asm/pvclock.h b/arch/x86/include/asm/pvclock.h
index 538ae94..7c1c895 100644
--- a/arch/x86/include/asm/pvclock.h
+++ b/arch/x86/include/asm/pvclock.h
@@ -69,31 +69,22 @@ static inline u64 pvclock_scale_delta(u64 delta, u32 
mul_frac, int shift)
 }
 
 static __always_inline
-u64 pvclock_get_nsec_offset(const struct pvclock_vcpu_time_info *src)
-{
-       u64 delta = rdtsc_ordered() - src->tsc_timestamp;
-       return pvclock_scale_delta(delta, src->tsc_to_system_mul,
-                                  src->tsc_shift);
-}
-
-static __always_inline
 unsigned __pvclock_read_cycles(const struct pvclock_vcpu_time_info *src,
                               cycle_t *cycles, u8 *flags)
 {
        unsigned version;
-       cycle_t ret, offset;
-       u8 ret_flags;
+       cycle_t offset;
+       u64 delta;
 
        version = src->version;
        /* Make the latest version visible */
        smp_rmb();
 
-       offset = pvclock_get_nsec_offset(src);
-       ret = src->system_time + offset;
-       ret_flags = src->flags;
-
-       *cycles = ret;
-       *flags = ret_flags;
+       delta = rdtsc_ordered() - src->tsc_timestamp;
+       offset = pvclock_scale_delta(delta, src->tsc_to_system_mul,
+                                  src->tsc_shift);
+       *cycles = src->system_time + offset;
+       *flags = src->flags;
        return version;
 }
 
-- 
2.6.3