x86/tlbflush.h: Define __native_flush_tlb_global_irq_disabled()

This function is called in __native_flush_tlb_global() and after
apply_microcode_early().

Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Link: http://lkml.kernel.org/r/1356075872-3054-8-git-send-email-fenghua.yu@intel.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>

1 files changed, 12 insertions, 6 deletions

diff --git a/arch/x86/include/asm/tlbflush.h b/arch/x86/include/asm/tlbflush.h
index 0fee48e279cc..50a7fc0f824a 100644
--- a/arch/x86/include/asm/tlbflush.h
+++ b/arch/x86/include/asm/tlbflush.h
@@ -20,10 +20,20 @@ static inline void __native_flush_tlb(void)
         native_write_cr3(native_read_cr3());
 }
 
+static inline void __native_flush_tlb_global_irq_disabled(void)
+{
+        unsigned long cr4;
+
+        cr4 = native_read_cr4();
+        /* clear PGE */
+        native_write_cr4(cr4 & ~X86_CR4_PGE);
+        /* write old PGE again and flush TLBs */
+        native_write_cr4(cr4);
+}
+
 static inline void __native_flush_tlb_global(void)
 {
         unsigned long flags;
-        unsigned long cr4;
 
         /*
          * Read-modify-write to CR4 - protect it from preemption and
@@ -32,11 +42,7 @@ static inline void __native_flush_tlb_global(void)
          */
         raw_local_irq_save(flags);
 
-        cr4 = native_read_cr4();
-        /* clear PGE */
-        native_write_cr4(cr4 & ~X86_CR4_PGE);
-        /* write old PGE again and flush TLBs */
-        native_write_cr4(cr4);
+        __native_flush_tlb_global_irq_disabled();
 
         raw_local_irq_restore(flags);
 }