2 files changed, 6 insertions, 1 deletions

diff --git a/arch/x86/include/asm/page_32_types.h b/arch/x86/include/asm/page_32_types.h
index f1e4a79a6e41..0f915ae649a7 100644
--- a/arch/x86/include/asm/page_32_types.h
+++ b/arch/x86/include/asm/page_32_types.h
@@ -39,6 +39,11 @@
 #define __VIRTUAL_MASK_SHIFT    32
 #endif  /* CONFIG_X86_PAE */
 
+/*
+ * Kernel image size is limited to 512 MB (see in arch/x86/kernel/head_32.S)
+ */
+#define KERNEL_IMAGE_SIZE       (512 * 1024 * 1024)
+
 #ifndef __ASSEMBLY__
 
 /*
diff --git a/arch/x86/kernel/head_32.S b/arch/x86/kernel/head_32.S
index db6652710e98..3ce5456dfbe6 100644
--- a/arch/x86/kernel/head_32.S
+++ b/arch/x86/kernel/head_32.S
@@ -54,7 +54,7 @@
  *
  * This should be a multiple of a page.
  */
-LOW_PAGES = 1<<(32-PAGE_SHIFT_asm)
+LOW_PAGES = (KERNEL_IMAGE_SIZE + PAGE_SIZE_asm - 1)>>PAGE_SHIFT
 
 /*
  * To preserve the DMA pool in PAGEALLOC kernels, we'll allocate