1 files changed, 14 insertions, 8 deletions

diff --git a/arch/x86/kernel/head_64.S b/arch/x86/kernel/head_64.S
index eb415043a929..a007454133a3 100644
--- a/arch/x86/kernel/head_64.S
+++ b/arch/x86/kernel/head_64.S
@@ -379,18 +379,24 @@ NEXT_PAGE(level2_ident_pgt)
         /* Since I easily can, map the first 1G.
          * Don't set NX because code runs from these pages.
          */
-        PMDS(0x0000000000000000, __PAGE_KERNEL_LARGE_EXEC, PTRS_PER_PMD)
+        PMDS(0, __PAGE_KERNEL_LARGE_EXEC, PTRS_PER_PMD)
 
 NEXT_PAGE(level2_kernel_pgt)
-        /* 40MB kernel mapping. The kernel code cannot be bigger than that.
-           When you change this change KERNEL_TEXT_SIZE in page.h too. */
-        /* (2^48-(2*1024*1024*1024)-((2^39)*511)-((2^30)*510)) = 0 */
-        PMDS(0x0000000000000000, __PAGE_KERNEL_LARGE_EXEC|_PAGE_GLOBAL, KERNEL_TEXT_SIZE/PMD_SIZE)
-        /* Module mapping starts here */
-        .fill   (PTRS_PER_PMD - (KERNEL_TEXT_SIZE/PMD_SIZE)),8,0
+        /*
+         * 128 MB kernel mapping. We spend a full page on this pagetable
+         * anyway.
+         *
+         * The kernel code+data+bss must not be bigger than that.
+         *
+         * (NOTE: at +128MB starts the module area, see MODULES_VADDR.
+         *  If you want to increase this then increase MODULES_VADDR
+         *  too.)
+         */
+        PMDS(0, __PAGE_KERNEL_LARGE_EXEC|_PAGE_GLOBAL,
+                KERNEL_IMAGE_SIZE/PMD_SIZE)
 
 NEXT_PAGE(level2_spare_pgt)
-        .fill   512,8,0
+        .fill   512, 8, 0
 
 #undef PMDS
 #undef NEXT_PAGE