Automatic merge of /spare/repo/netdev-2.6 branch we18

2 files changed, 17 insertions, 23 deletions

diff --git a/arch/x86_64/mm/fault.c b/arch/x86_64/mm/fault.c
index e03309216764..5d6b2114cc9a 100644
--- a/arch/x86_64/mm/fault.c
+++ b/arch/x86_64/mm/fault.c
@@ -234,6 +234,8 @@ static noinline void pgtable_bad(unsigned long address, struct pt_regs *regs,
 
 /*
  * Handle a fault on the vmalloc or module mapping area
+ *
+ * This assumes no large pages in there.
  */
 static int vmalloc_fault(unsigned long address)
 {
@@ -272,7 +274,10 @@ static int vmalloc_fault(unsigned long address)
         if (!pte_present(*pte_ref))
                 return -1;
         pte = pte_offset_kernel(pmd, address);
-        if (!pte_present(*pte) || pte_page(*pte) != pte_page(*pte_ref))
+        /* Don't use pte_page here, because the mappings can point
+           outside mem_map, and the NUMA hash lookup cannot handle
+           that. */
+        if (!pte_present(*pte) || pte_pfn(*pte) != pte_pfn(*pte_ref))
                 BUG();
         __flush_tlb_all();
         return 0;
@@ -346,7 +351,9 @@ asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long error_code)
          * protection error (error_code & 1) == 0.
          */
         if (unlikely(address >= TASK_SIZE)) {
-                if (!(error_code & 5)) {
+                if (!(error_code & 5) &&
+                      ((address >= VMALLOC_START && address < VMALLOC_END) ||
+                       (address >= MODULES_VADDR && address < MODULES_END))) {
                         if (vmalloc_fault(address) < 0)
                                 goto bad_area_nosemaphore;
                         return;
diff --git a/arch/x86_64/mm/ioremap.c b/arch/x86_64/mm/ioremap.c
index 74ec8554b195..58aac23760ef 100644
--- a/arch/x86_64/mm/ioremap.c
+++ b/arch/x86_64/mm/ioremap.c
@@ -133,7 +133,7 @@ ioremap_change_attr(unsigned long phys_addr, unsigned long size,
                                         unsigned long flags)
 {
         int err = 0;
-        if (flags && phys_addr + size - 1 < (end_pfn_map << PAGE_SHIFT)) {
+        if (phys_addr + size - 1 < (end_pfn_map << PAGE_SHIFT)) {
                 unsigned long npages = (size + PAGE_SIZE - 1) >> PAGE_SHIFT;
                 unsigned long vaddr = (unsigned long) __va(phys_addr);
 
@@ -214,7 +214,7 @@ void __iomem * __ioremap(unsigned long phys_addr, unsigned long size, unsigned l
                 remove_vm_area((void *)(PAGE_MASK & (unsigned long) addr));
                 return NULL;
         }
-        if (ioremap_change_attr(phys_addr, size, flags) < 0) {
+        if (flags && ioremap_change_attr(phys_addr, size, flags) < 0) {
                 area->flags &= 0xffffff;
                 vunmap(addr);
                 return NULL;
@@ -251,7 +251,7 @@ void __iomem *ioremap_nocache (unsigned long phys_addr, unsigned long size)
 
 void iounmap(volatile void __iomem *addr)
 {
-        struct vm_struct *p, **pprev;
+        struct vm_struct *p;
 
         if (addr <= high_memory) 
                 return; 
@@ -260,24 +260,11 @@ void iounmap(volatile void __iomem *addr)
                 return;
 
         write_lock(&vmlist_lock);
-        for (p = vmlist, pprev = &vmlist; p != NULL; pprev = &p->next, p = *pprev)
-                if (p->addr == (void *)(PAGE_MASK & (unsigned long)addr))
-                        break;
-        if (!p) { 
-                printk("__iounmap: bad address %p\n", addr);
-                goto out_unlock;
-        }
-        *pprev = p->next;
-        unmap_vm_area(p);
-        if ((p->flags >> 20) &&
-                p->phys_addr + p->size - 1 < virt_to_phys(high_memory)) {
-                /* p->size includes the guard page, but cpa doesn't like that */
-                change_page_attr(virt_to_page(__va(p->phys_addr)),
-                                 p->size >> PAGE_SHIFT,
-                                 PAGE_KERNEL);
-                global_flush_tlb();
-        } 
-out_unlock:
+        p = __remove_vm_area((void *)((unsigned long)addr & PAGE_MASK));
+        if (!p)
+                printk("iounmap: bad address %p\n", addr);
+        else if (p->flags >> 20)
+                ioremap_change_attr(p->phys_addr, p->size, 0);
         write_unlock(&vmlist_lock);
         kfree(p); 
 }