Merge remote-tracking branches 'spi/fix/atmel', 'spi/fix/imx', 'spi/fix/omap2-mcspi...

[firefly-linux-kernel-4.4.55.git] / arch / x86 / kernel / setup.c

diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index fdb7f2a2d3286013a7ea41d392e48596c90fc672..a3cccbfc5f777e3483cad7da4a5a587bdd56c09c 100644 (file)
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -1173,6 +1173,14 @@ void __init setup_arch(char **cmdline_p)
        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,
+                       KERNEL_PGD_PTRS);
 #endif
 
        tboot_probe();