Merge master.kernel.org:/pub/scm/linux/kernel/git/lethal/sh-2.6

* master.kernel.org:/pub/scm/linux/kernel/git/lethal/sh-2.6: (108 commits)
  sh: Fix occasional flush_cache_4096() stack corruption.
  sh: Calculate shm alignment at runtime.
  sh: dma-mapping compile fixes.
  sh: Initial vsyscall page support.
  sh: Clean up PAGE_SIZE definition for assembly use.
  sh: Selective flush_cache_mm() flushing.
  sh: More intelligent entry_mask/way_size calculation.
  sh: Support for L2 cache on newer SH-4A CPUs.
  sh: Update kexec support for API changes.
  sh: Optimized readsl()/writesl() support.
  sh: Report movli.l/movco.l capabilities.
  sh: CPU flags in AT_HWCAP in ELF auxvt.
  sh: Add support for 4K stacks.
  sh: Enable /proc/kcore support.
  sh: stack debugging support.
  sh: select CONFIG_EMBEDDED.
  sh: machvec rework.
  sh: Solution Engine SH7343 board support.
  sh: SH7710VoIPGW board support.
  sh: Enable verbose BUG() support.
  ...

1 files changed, 29 insertions, 3 deletions

diff --git a/arch/sh/mm/init.c b/arch/sh/mm/init.c
index 8ea27ca4b700..7154d1ce9785 100644
--- a/arch/sh/mm/init.c
+++ b/arch/sh/mm/init.c
@@ -24,7 +24,7 @@
 #include <linux/highmem.h>
 #include <linux/bootmem.h>
 #include <linux/pagemap.h>
-
+#include <linux/proc_fs.h>
 #include <asm/processor.h>
 #include <asm/system.h>
 #include <asm/uaccess.h>
@@ -80,6 +80,7 @@ void show_mem(void)
 static void set_pte_phys(unsigned long addr, unsigned long phys, pgprot_t prot)
 {
         pgd_t *pgd;
+        pud_t *pud;
         pmd_t *pmd;
         pte_t *pte;
 
@@ -89,7 +90,17 @@ static void set_pte_phys(unsigned long addr, unsigned long phys, pgprot_t prot)
                 return;
         }
 
-        pmd = pmd_offset(pgd, addr);
+        pud = pud_offset(pgd, addr);
+        if (pud_none(*pud)) {
+                pmd = (pmd_t *)get_zeroed_page(GFP_ATOMIC);
+                set_pud(pud, __pud(__pa(pmd) | _KERNPG_TABLE | _PAGE_USER));
+                if (pmd != pmd_offset(pud, 0)) {
+                        pud_ERROR(*pud);
+                        return;
+                }
+        }
+
+        pmd = pmd_offset(pud, addr);
         if (pmd_none(*pmd)) {
                 pte = (pte_t *)get_zeroed_page(GFP_ATOMIC);
                 set_pmd(pmd, __pmd(__pa(pte) | _KERNPG_TABLE | _PAGE_USER));
@@ -212,6 +223,8 @@ void __init paging_init(void)
         free_area_init_node(0, NODE_DATA(0), zones_size, __MEMORY_START >> PAGE_SHIFT, 0);
 }
 
+static struct kcore_list kcore_mem, kcore_vmalloc;
+
 void __init mem_init(void)
 {
         extern unsigned long empty_zero_page[1024];
@@ -237,8 +250,13 @@ void __init mem_init(void)
          * Setup wrappers for copy/clear_page(), these will get overridden
          * later in the boot process if a better method is available.
          */
+#ifdef CONFIG_MMU
         copy_page = copy_page_slow;
         clear_page = clear_page_slow;
+#else
+        copy_page = copy_page_nommu;
+        clear_page = clear_page_nommu;
+#endif
 
         /* this will put all low memory onto the freelists */
         totalram_pages += free_all_bootmem_node(NODE_DATA(0));
@@ -254,7 +272,12 @@ void __init mem_init(void)
         datasize =  (unsigned long) &_edata - (unsigned long) &_etext;
         initsize =  (unsigned long) &__init_end - (unsigned long) &__init_begin;
 
-        printk("Memory: %luk/%luk available (%dk kernel code, %dk reserved, %dk data, %dk init)\n",
+        kclist_add(&kcore_mem, __va(0), max_low_pfn << PAGE_SHIFT);
+        kclist_add(&kcore_vmalloc, (void *)VMALLOC_START,
+                   VMALLOC_END - VMALLOC_START);
+
+        printk(KERN_INFO "Memory: %luk/%luk available (%dk kernel code, "
+               "%dk reserved, %dk data, %dk init)\n",
                 (unsigned long) nr_free_pages() << (PAGE_SHIFT-10),
                 max_mapnr << (PAGE_SHIFT-10),
                 codesize >> 10,
@@ -263,6 +286,9 @@ void __init mem_init(void)
                 initsize >> 10);
 
         p3_cache_init();
+
+        /* Initialize the vDSO */
+        vsyscall_init();
 }
 
 void free_initmem(void)