These fields are only written to.
Signed-off-by: Nicholas Piggin <npig...@gmail.com>
---
arch/powerpc/include/asm/processor.h | 4 ----
arch/powerpc/kernel/process.c | 6 +-----
2 files changed, 1 insertion(+), 9 deletions(-)
diff --git a/arch/powerpc/include/asm/processor.h
b/arch/powerpc/include/asm/processor.h
index 01299cdc9806..67eedcc6d803 100644
--- a/arch/powerpc/include/asm/processor.h
+++ b/arch/powerpc/include/asm/processor.h
@@ -251,10 +251,6 @@ struct thread_struct {
struct thread_fp_state *fp_save_area;
int fpexc_mode; /* floating-point exception mode */
unsigned int align_ctl; /* alignment handling control */
-#ifdef CONFIG_PPC64
- unsigned long start_tb; /* Start purr when proc switched in */
- unsigned long accum_tb; /* Total accumulated purr for process */
-#endif
#ifdef CONFIG_HAVE_HW_BREAKPOINT
struct perf_event *ptrace_bps[HBP_NUM];
/*
diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index ec4f363ebb89..9626b991da52 100644
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c
@@ -1169,11 +1169,7 @@ struct task_struct *__switch_to(struct task_struct *prev,
*/
if (firmware_has_feature(FW_FEATURE_SPLPAR)) {
struct cpu_usage *cu = this_cpu_ptr(&cpu_usage_array);
- long unsigned start_tb, current_tb;
- start_tb = old_thread->start_tb;
- cu->current_tb = current_tb = mfspr(SPRN_PURR);
- old_thread->accum_tb += (current_tb - start_tb);
- new_thread->start_tb = current_tb;
+ cu->current_tb = mfspr(SPRN_PURR);
}
#endif /* CONFIG_PPC64 */
--
2.16.1
