x86: use v8086_mode helper, trivial unification

Use v8086_mode inline in fault_32.c, no functional change
also ifdef the section for 32-bit only and add to fault_64.c

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 11 insertions, 0 deletions

diff --git a/arch/x86/mm/fault_64.c b/arch/x86/mm/fault_64.c
index 9ef0306efe9e..2d9e6da2cb30 100644
--- a/arch/x86/mm/fault_64.c
+++ b/arch/x86/mm/fault_64.c
@@ -514,6 +514,17 @@ good_area:
                 tsk->maj_flt++;
         else
                 tsk->min_flt++;
+
+#ifdef CONFIG_X86_32
+        /*
+         * Did it hit the DOS screen memory VA from vm86 mode?
+         */
+        if (v8086_mode(regs)) {
+                unsigned long bit = (address - 0xA0000) >> PAGE_SHIFT;
+                if (bit < 32)
+                        tsk->thread.screen_bitmap |= 1 << bit;
+        }
+#endif
         up_read(&mm->mmap_sem);
         return;