1 files changed, 55 insertions, 27 deletions

diff --git a/arch/i386/mm/init.c b/arch/i386/mm/init.c
index 89e8486aac34..4a5a914b3432 100644
--- a/arch/i386/mm/init.c
+++ b/arch/i386/mm/init.c
@@ -435,16 +435,22 @@ u64 __supported_pte_mask __read_mostly = ~_PAGE_NX;
  * on      Enable
  * off     Disable
  */
-void __init noexec_setup(const char *str)
+static int __init noexec_setup(char *str)
 {
-        if (!strncmp(str, "on",2) && cpu_has_nx) {
-                __supported_pte_mask |= _PAGE_NX;
-                disable_nx = 0;
-        } else if (!strncmp(str,"off",3)) {
+        if (!str || !strcmp(str, "on")) {
+                if (cpu_has_nx) {
+                        __supported_pte_mask |= _PAGE_NX;
+                        disable_nx = 0;
+                }
+        } else if (!strcmp(str,"off")) {
                 disable_nx = 1;
                 __supported_pte_mask &= ~_PAGE_NX;
-        }
+        } else
+                return -EINVAL;
+
+        return 0;
 }
+early_param("noexec", noexec_setup);
 
 int nx_enabled = 0;
 #ifdef CONFIG_X86_PAE
@@ -552,18 +558,6 @@ static void __init test_wp_bit(void)
         }
 }
 
-static void __init set_max_mapnr_init(void)
-{
-#ifdef CONFIG_HIGHMEM
-        num_physpages = highend_pfn;
-#else
-        num_physpages = max_low_pfn;
-#endif
-#ifdef CONFIG_FLATMEM
-        max_mapnr = num_physpages;
-#endif
-}
-
 static struct kcore_list kcore_mem, kcore_vmalloc; 
 
 void __init mem_init(void)
@@ -590,14 +584,6 @@ void __init mem_init(void)
         }
 #endif
  
-        set_max_mapnr_init();
-
-#ifdef CONFIG_HIGHMEM
-        high_memory = (void *) __va(highstart_pfn * PAGE_SIZE - 1) + 1;
-#else
-        high_memory = (void *) __va(max_low_pfn * PAGE_SIZE - 1) + 1;
-#endif
-
         /* this will put all low memory onto the freelists */
         totalram_pages += free_all_bootmem();
 
@@ -629,6 +615,48 @@ void __init mem_init(void)
                 (unsigned long) (totalhigh_pages << (PAGE_SHIFT-10))
                );
 
+#if 1 /* double-sanity-check paranoia */
+        printk("virtual kernel memory layout:\n"
+               "    fixmap  : 0x%08lx - 0x%08lx   (%4ld kB)\n"
+#ifdef CONFIG_HIGHMEM
+               "    pkmap   : 0x%08lx - 0x%08lx   (%4ld kB)\n"
+#endif
+               "    vmalloc : 0x%08lx - 0x%08lx   (%4ld MB)\n"
+               "    lowmem  : 0x%08lx - 0x%08lx   (%4ld MB)\n"
+               "      .init : 0x%08lx - 0x%08lx   (%4ld kB)\n"
+               "      .data : 0x%08lx - 0x%08lx   (%4ld kB)\n"
+               "      .text : 0x%08lx - 0x%08lx   (%4ld kB)\n",
+               FIXADDR_START, FIXADDR_TOP,
+               (FIXADDR_TOP - FIXADDR_START) >> 10,
+
+#ifdef CONFIG_HIGHMEM
+               PKMAP_BASE, PKMAP_BASE+LAST_PKMAP*PAGE_SIZE,
+               (LAST_PKMAP*PAGE_SIZE) >> 10,
+#endif
+
+               VMALLOC_START, VMALLOC_END,
+               (VMALLOC_END - VMALLOC_START) >> 20,
+
+               (unsigned long)__va(0), (unsigned long)high_memory,
+               ((unsigned long)high_memory - (unsigned long)__va(0)) >> 20,
+
+               (unsigned long)&__init_begin, (unsigned long)&__init_end,
+               ((unsigned long)&__init_end - (unsigned long)&__init_begin) >> 10,
+
+               (unsigned long)&_etext, (unsigned long)&_edata,
+               ((unsigned long)&_edata - (unsigned long)&_etext) >> 10,
+
+               (unsigned long)&_text, (unsigned long)&_etext,
+               ((unsigned long)&_etext - (unsigned long)&_text) >> 10);
+
+#ifdef CONFIG_HIGHMEM
+        BUG_ON(PKMAP_BASE+LAST_PKMAP*PAGE_SIZE > FIXADDR_START);
+        BUG_ON(VMALLOC_END                     > PKMAP_BASE);
+#endif
+        BUG_ON(VMALLOC_START                   > VMALLOC_END);
+        BUG_ON((unsigned long)high_memory      > VMALLOC_START);
+#endif /* double-sanity-check paranoia */
+
 #ifdef CONFIG_X86_PAE
         if (!cpu_has_pae)
                 panic("cannot execute a PAE-enabled kernel on a PAE-less CPU!");
@@ -657,7 +685,7 @@ void __init mem_init(void)
 int arch_add_memory(int nid, u64 start, u64 size)
 {
         struct pglist_data *pgdata = &contig_page_data;
-        struct zone *zone = pgdata->node_zones + MAX_NR_ZONES-1;
+        struct zone *zone = pgdata->node_zones + ZONE_HIGHMEM;
         unsigned long start_pfn = start >> PAGE_SHIFT;
         unsigned long nr_pages = size >> PAGE_SHIFT;