ALSA: hda - fix name for ALC1200

[pandora-kernel.git] / mm / memory.c

diff --git a/mm/memory.c b/mm/memory.c
index 6b29f39..0a2010a 100644 (file)
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -99,50 +99,6 @@ int randomize_va_space __read_mostly =
                                        2;
 #endif
 
-#ifndef track_pfn_vma_new
-/*
- * Interface that can be used by architecture code to keep track of
- * memory type of pfn mappings (remap_pfn_range, vm_insert_pfn)
- *
- * track_pfn_vma_new is called when a _new_ pfn mapping is being established
- * for physical range indicated by pfn and size.
- */
-int track_pfn_vma_new(struct vm_area_struct *vma, pgprot_t prot,
-                       unsigned long pfn, unsigned long size)
-{
-       return 0;
-}
-#endif
-
-#ifndef track_pfn_vma_copy
-/*
- * Interface that can be used by architecture code to keep track of
- * memory type of pfn mappings (remap_pfn_range, vm_insert_pfn)
- *
- * track_pfn_vma_copy is called when vma that is covering the pfnmap gets
- * copied through copy_page_range().
- */
-int track_pfn_vma_copy(struct vm_area_struct *vma)
-{
-       return 0;
-}
-#endif
-
-#ifndef untrack_pfn_vma
-/*
- * Interface that can be used by architecture code to keep track of
- * memory type of pfn mappings (remap_pfn_range, vm_insert_pfn)
- *
- * untrack_pfn_vma is called while unmapping a pfnmap for a region.
- * untrack can be called for a specific region indicated by pfn and size or
- * can be for the entire vma (in which case size can be zero).
- */
-void untrack_pfn_vma(struct vm_area_struct *vma, unsigned long pfn,
-                       unsigned long size)
-{
-}
-#endif
-
 static int __init disable_randmaps(char *s)
 {
        randomize_va_space = 0;
@@ -713,7 +669,7 @@ int copy_page_range(struct mm_struct *dst_mm, struct mm_struct *src_mm,
        if (is_vm_hugetlb_page(vma))
                return copy_hugetlb_page_range(dst_mm, src_mm, vma);
 
-       if (is_pfn_mapping(vma)) {
+       if (unlikely(is_pfn_mapping(vma))) {
                /*
                 * We do not free on error cases below as remove_vma
                 * gets called on error from higher level routine
@@ -969,7 +925,7 @@ unsigned long unmap_vmas(struct mmu_gather **tlbp,
                if (vma->vm_flags & VM_ACCOUNT)
                        *nr_accounted += (end - start) >> PAGE_SHIFT;
 
-               if (is_pfn_mapping(vma))
+               if (unlikely(is_pfn_mapping(vma)))
                        untrack_pfn_vma(vma, 0, 0);
 
                while (start != end) {
@@ -3119,3 +3075,18 @@ void print_vma_addr(char *prefix, unsigned long ip)
        }
        up_read(&current->mm->mmap_sem);
 }
+
+#ifdef CONFIG_PROVE_LOCKING
+void might_fault(void)
+{
+       might_sleep();
+       /*
+        * it would be nicer only to annotate paths which are not under
+        * pagefault_disable, however that requires a larger audit and
+        * providing helpers like get_user_atomic.
+        */
+       if (!in_atomic() && current->mm)
+               might_lock_read(&current->mm->mmap_sem);
+}
+EXPORT_SYMBOL(might_fault);
+#endif