Merge 4.16-rc6 into tty-next

We want the serial/tty fixes in here as well.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 4 insertions, 13 deletions

diff --git a/arch/x86/kernel/setup_percpu.c b/arch/x86/kernel/setup_percpu.c
index 497aa766fab3..ea554f812ee1 100644
--- a/arch/x86/kernel/setup_percpu.c
+++ b/arch/x86/kernel/setup_percpu.c
@@ -287,24 +287,15 @@ void __init setup_per_cpu_areas(void)
         /* Setup cpu initialized, callin, callout masks */
         setup_cpu_local_masks();
 
-#ifdef CONFIG_X86_32
         /*
          * Sync back kernel address range again.  We already did this in
          * setup_arch(), but percpu data also needs to be available in
          * the smpboot asm.  We can't reliably pick up percpu mappings
          * using vmalloc_fault(), because exception dispatch needs
          * percpu data.
+         *
+         * FIXME: Can the later sync in setup_cpu_entry_areas() replace
+         * this call?
          */
-        clone_pgd_range(initial_page_table + KERNEL_PGD_BOUNDARY,
-                        swapper_pg_dir     + KERNEL_PGD_BOUNDARY,
-                        KERNEL_PGD_PTRS);
-
-        /*
-         * sync back low identity map too.  It is used for example
-         * in the 32-bit EFI stub.
-         */
-        clone_pgd_range(initial_page_table,
-                        swapper_pg_dir     + KERNEL_PGD_BOUNDARY,
-                        min(KERNEL_PGD_PTRS, KERNEL_PGD_BOUNDARY));
-#endif
+        sync_initial_page_table();
 }