x86: Replace uses of current_cpu_data with this_cpu ops

Replace all uses of current_cpu_data with this_cpu operations on the
per cpu structure cpu_info.  The scala accesses are replaced with the
matching this_cpu ops which results in smaller and more efficient
code.

In the long run, it might be a good idea to remove cpu_data() macro
too and use per_cpu macro directly.

tj: updated description

Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Ingo Molnar <mingo@elte.hu>
Acked-by: H. Peter Anvin <hpa@zytor.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Tejun Heo <tj@kernel.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c
index 57d1868a86aa..dae1c0766d9a 100644
--- a/arch/x86/kernel/process.c
+++ b/arch/x86/kernel/process.c
@@ -445,7 +445,7 @@ void mwait_idle_with_hints(unsigned long ax, unsigned long cx)
 {
         trace_power_start(POWER_CSTATE, (ax>>4)+1, smp_processor_id());
         if (!need_resched()) {
-                if (cpu_has(&current_cpu_data, X86_FEATURE_CLFLUSH_MONITOR))
+                if (cpu_has(__this_cpu_ptr(&cpu_info), X86_FEATURE_CLFLUSH_MONITOR))
                         clflush((void *)&current_thread_info()->flags);
 
                 __monitor((void *)&current_thread_info()->flags, 0, 0);
@@ -460,7 +460,7 @@ static void mwait_idle(void)
 {
         if (!need_resched()) {
                 trace_power_start(POWER_CSTATE, 1, smp_processor_id());
-                if (cpu_has(&current_cpu_data, X86_FEATURE_CLFLUSH_MONITOR))
+                if (cpu_has(__this_cpu_ptr(&cpu_info), X86_FEATURE_CLFLUSH_MONITOR))
                         clflush((void *)&current_thread_info()->flags);
 
                 __monitor((void *)&current_thread_info()->flags, 0, 0);