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Subject[PATCH] x86: set_cyc2ns_scale() remove tsc_now and ns_now
Date

Both are unused and the functions rdtscll() and __cycles_2_ns() don't have
side-effects.

Signed-off-by: Karsten Wiese <fzu@wemgehoertderstaat.de>
---
arch/x86/kernel/tsc_32.c | 4 ----
arch/x86/kernel/tsc_64.c | 4 ----
2 files changed, 0 insertions(+), 8 deletions(-)

diff --git a/arch/x86/kernel/tsc_32.c b/arch/x86/kernel/tsc_32.c
index 82602d7..0406b80 100644
--- a/arch/x86/kernel/tsc_32.c
+++ b/arch/x86/kernel/tsc_32.c
@@ -84,7 +84,6 @@ DEFINE_PER_CPU(unsigned long, cyc2ns);

static void set_cyc2ns_scale(unsigned long cpu_khz, int cpu)
{
- unsigned long long tsc_now, ns_now;
unsigned long flags, *scale;

local_irq_save(flags);
@@ -92,9 +91,6 @@ static void set_cyc2ns_scale(unsigned long cpu_khz, int cpu)

scale = &per_cpu(cyc2ns, cpu);

- rdtscll(tsc_now);
- ns_now = __cycles_2_ns(tsc_now);
-
if (cpu_khz)
*scale = (NSEC_PER_MSEC << CYC2NS_SCALE_FACTOR)/cpu_khz;

diff --git a/arch/x86/kernel/tsc_64.c b/arch/x86/kernel/tsc_64.c
index f08e1ea..5246036 100644
--- a/arch/x86/kernel/tsc_64.c
+++ b/arch/x86/kernel/tsc_64.c
@@ -44,7 +44,6 @@ DEFINE_PER_CPU(unsigned long, cyc2ns);

static void set_cyc2ns_scale(unsigned long cpu_khz, int cpu)
{
- unsigned long long tsc_now, ns_now;
unsigned long flags, *scale;

local_irq_save(flags);
@@ -52,9 +51,6 @@ static void set_cyc2ns_scale(unsigned long cpu_khz, int cpu)

scale = &per_cpu(cyc2ns, cpu);

- rdtscll(tsc_now);
- ns_now = __cycles_2_ns(tsc_now);
-
if (cpu_khz)
*scale = (NSEC_PER_MSEC << CYC2NS_SCALE_FACTOR)/cpu_khz;

--
1.5.3.3


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