[PATCH] x86_64: miscellaneous mm/init.c fixes

 - fix an off-by-one error in phys_pmd_init()
 - prevent phys_pmd_init() from removing mappings established earlier
 - fix the direct mapping early printk to in fact show the end of the range
 - remove an apparently orphan comment

Signed-off-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/arch/x86_64/mm/init.c b/arch/x86_64/mm/init.c
index 2f5f5b1..02add1d 100644 (file)
--- a/arch/x86_64/mm/init.c
+++ b/arch/x86_64/mm/init.c
@@ -88,8 +88,6 @@ void show_mem(void)
        printk(KERN_INFO "%lu pages swap cached\n",cached);
 }
 
-/* References to section boundaries */
-
 int after_bootmem;
 
 static __init void *spp_getpage(void)
@@ -259,9 +257,10 @@ phys_pmd_init(pmd_t *pmd, unsigned long address, unsigned long end)
        for (i = 0; i < PTRS_PER_PMD; pmd++, i++, address += PMD_SIZE) {
                unsigned long entry;
 
-               if (address > end) {
-                       for (; i < PTRS_PER_PMD; i++, pmd++)
-                               set_pmd(pmd, __pmd(0));
+               if (address >= end) {
+                       if (!after_bootmem)
+                               for (; i < PTRS_PER_PMD; i++, pmd++)
+                                       set_pmd(pmd, __pmd(0));
                        break;
                }
                entry = _PAGE_NX|_PAGE_PSE|_KERNPG_TABLE|_PAGE_GLOBAL|address;
@@ -339,7 +338,8 @@ static void __init find_early_table_space(unsigned long end)
        table_end = table_start;
 
        early_printk("kernel direct mapping tables up to %lx @ %lx-%lx\n",
-               end, table_start << PAGE_SHIFT, table_end << PAGE_SHIFT);
+               end, table_start << PAGE_SHIFT,
+               (table_start << PAGE_SHIFT) + tables);
 }
 
 /* Setup the direct mapping of the physical memory at PAGE_OFFSET.