The only call site also calls idle_task_exit(), and idle_task_exit()
puts us into a clean state by explicitly switching to init_mm.
Signed-off-by: Andy Lutomirski <luto@xxxxxxxxxx>
---
arch/x86/include/asm/tlbflush.h | 8 --------
arch/x86/kernel/smpboot.c | 1 -
2 files changed, 9 deletions(-)
diff --git a/arch/x86/include/asm/tlbflush.h b/arch/x86/include/asm/tlbflush.h
index 388c2463fde6..ee5a138602e8 100644
--- a/arch/x86/include/asm/tlbflush.h
+++ b/arch/x86/include/asm/tlbflush.h
@@ -259,14 +259,6 @@ void native_flush_tlb_others(const struct cpumask *cpumask,
#define TLBSTATE_OK 1
#define TLBSTATE_LAZY 2
-static inline void reset_lazy_tlbstate(void)
-{
- this_cpu_write(cpu_tlbstate.state, 0);
- this_cpu_write(cpu_tlbstate.loaded_mm, &init_mm);
-
- WARN_ON(read_cr3() != __pa_symbol(swapper_pg_dir));
-}
-
static inline void arch_tlbbatch_add_mm(struct arch_tlbflush_unmap_batch *batch,
struct mm_struct *mm)
{
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index f04479a8f74f..6169a56aab49 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -1589,7 +1589,6 @@ void native_cpu_die(unsigned int cpu)
void play_dead_common(void)
{
idle_task_exit();
- reset_lazy_tlbstate();
/* Ack it */
(void)cpu_report_death();
--
2.9.3
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@xxxxxxxxx. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>
