[RFC 02/11] x86/mm: Remove reset_lazy_tlbstate()

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



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>



[Index of Archives]     [Linux ARM Kernel]     [Linux ARM]     [Linux Omap]     [Fedora ARM]     [IETF Annouce]     [Bugtraq]     [Linux OMAP]     [Linux MIPS]     [eCos]     [Asterisk Internet PBX]     [Linux API]
  Powered by Linux