md: linear: Make array_size sector-based and rename it to array_sectors.

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

diff --git a/mm/mmap.c b/mm/mmap.c
index a32d28c..3354fdd 100644 (file)
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -80,7 +80,7 @@ EXPORT_SYMBOL(vm_get_page_prot);
 int sysctl_overcommit_memory = OVERCOMMIT_GUESS;  /* heuristic overcommit */
 int sysctl_overcommit_ratio = 50;      /* default is 50% */
 int sysctl_max_map_count __read_mostly = DEFAULT_MAX_MAP_COUNT;
-atomic_t vm_committed_space = ATOMIC_INIT(0);
+atomic_long_t vm_committed_space = ATOMIC_LONG_INIT(0);
 
 /*
  * Check that a process has enough memory to allocate a new virtual
@@ -177,7 +177,7 @@ int __vm_enough_memory(struct mm_struct *mm, long pages, int cap_sys_admin)
         * cast `allowed' as a signed long because vm_committed_space
         * sometimes has a negative value
         */
-       if (atomic_read(&vm_committed_space) < (long)allowed)
+       if (atomic_long_read(&vm_committed_space) < (long)allowed)
                return 0;
 error:
        vm_unacct_memory(pages);
@@ -230,9 +230,12 @@ static struct vm_area_struct *remove_vma(struct vm_area_struct *vma)
        might_sleep();
        if (vma->vm_ops && vma->vm_ops->close)
                vma->vm_ops->close(vma);
-       if (vma->vm_file)
+       if (vma->vm_file) {
                fput(vma->vm_file);
-       mpol_free(vma_policy(vma));
+               if (vma->vm_flags & VM_EXECUTABLE)
+                       removed_exe_file_vma(vma->vm_mm);
+       }
+       mpol_put(vma_policy(vma));
        kmem_cache_free(vm_area_cachep, vma);
        return next;
 }
@@ -242,10 +245,16 @@ asmlinkage unsigned long sys_brk(unsigned long brk)
        unsigned long rlim, retval;
        unsigned long newbrk, oldbrk;
        struct mm_struct *mm = current->mm;
+       unsigned long min_brk;
 
        down_write(&mm->mmap_sem);
 
-       if (brk < mm->start_brk)
+#ifdef CONFIG_COMPAT_BRK
+       min_brk = mm->end_code;
+#else
+       min_brk = mm->start_brk;
+#endif
+       if (brk < min_brk)
                goto out;
 
        /*
@@ -623,10 +632,13 @@ again:                    remove_next = 1 + (end > next->vm_end);
                spin_unlock(&mapping->i_mmap_lock);
 
        if (remove_next) {
-               if (file)
+               if (file) {
                        fput(file);
+                       if (next->vm_flags & VM_EXECUTABLE)
+                               removed_exe_file_vma(mm);
+               }
                mm->map_count--;
-               mpol_free(vma_policy(next));
+               mpol_put(vma_policy(next));
                kmem_cache_free(vm_area_cachep, next);
                /*
                 * In mprotect's case 6 (see comments on vma_merge),
@@ -1068,7 +1080,6 @@ int vma_wants_writenotify(struct vm_area_struct *vma)
                mapping_cap_account_dirty(vma->vm_file->f_mapping);
 }
 
-
 unsigned long mmap_region(struct file *file, unsigned long addr,
                          unsigned long len, unsigned long flags,
                          unsigned int vm_flags, unsigned long pgoff,
@@ -1155,6 +1166,8 @@ munmap_back:
                error = file->f_op->mmap(file, vma);
                if (error)
                        goto unmap_and_free_vma;
+               if (vm_flags & VM_EXECUTABLE)
+                       added_exe_file_vma(mm);
        } else if (vm_flags & VM_SHARED) {
                error = shmem_zero_setup(vma);
                if (error)
@@ -1181,22 +1194,22 @@ munmap_back:
        if (vma_wants_writenotify(vma))
                vma->vm_page_prot = vm_get_page_prot(vm_flags & ~VM_SHARED);
 
-       if (!file || !vma_merge(mm, prev, addr, vma->vm_end,
+       if (file && vma_merge(mm, prev, addr, vma->vm_end,
                        vma->vm_flags, NULL, file, pgoff, vma_policy(vma))) {
-               file = vma->vm_file;
-               vma_link(mm, vma, prev, rb_link, rb_parent);
-               if (correct_wcount)
-                       atomic_inc(&inode->i_writecount);
-       } else {
-               if (file) {
-                       if (correct_wcount)
-                               atomic_inc(&inode->i_writecount);
-                       fput(file);
-               }
-               mpol_free(vma_policy(vma));
+               mpol_put(vma_policy(vma));
                kmem_cache_free(vm_area_cachep, vma);
+               fput(file);
+               if (vm_flags & VM_EXECUTABLE)
+                       removed_exe_file_vma(mm);
+       } else {
+               vma_link(mm, vma, prev, rb_link, rb_parent);
+               file = vma->vm_file;
        }
-out:   
+
+       /* Once vma denies write, undo our temporary denial count */
+       if (correct_wcount)
+               atomic_inc(&inode->i_writecount);
+out:
        mm->total_vm += len >> PAGE_SHIFT;
        vm_stat_account(mm, vm_flags, file, len >> PAGE_SHIFT);
        if (vm_flags & VM_LOCKED) {
@@ -1813,15 +1826,18 @@ int split_vma(struct mm_struct * mm, struct vm_area_struct * vma,
                new->vm_pgoff += ((addr - vma->vm_start) >> PAGE_SHIFT);
        }
 
-       pol = mpol_copy(vma_policy(vma));
+       pol = mpol_dup(vma_policy(vma));
        if (IS_ERR(pol)) {
                kmem_cache_free(vm_area_cachep, new);
                return PTR_ERR(pol);
        }
        vma_set_policy(new, pol);
 
-       if (new->vm_file)
+       if (new->vm_file) {
                get_file(new->vm_file);
+               if (vma->vm_flags & VM_EXECUTABLE)
+                       added_exe_file_vma(mm);
+       }
 
        if (new->vm_ops && new->vm_ops->open)
                new->vm_ops->open(new);
@@ -2129,7 +2145,7 @@ struct vm_area_struct *copy_vma(struct vm_area_struct **vmap,
                new_vma = kmem_cache_alloc(vm_area_cachep, GFP_KERNEL);
                if (new_vma) {
                        *new_vma = *vma;
-                       pol = mpol_copy(vma_policy(vma));
+                       pol = mpol_dup(vma_policy(vma));
                        if (IS_ERR(pol)) {
                                kmem_cache_free(vm_area_cachep, new_vma);
                                return NULL;
@@ -2138,8 +2154,11 @@ struct vm_area_struct *copy_vma(struct vm_area_struct **vmap,
                        new_vma->vm_start = addr;
                        new_vma->vm_end = addr + len;
                        new_vma->vm_pgoff = pgoff;
-                       if (new_vma->vm_file)
+                       if (new_vma->vm_file) {
                                get_file(new_vma->vm_file);
+                               if (vma->vm_flags & VM_EXECUTABLE)
+                                       added_exe_file_vma(mm);
+                       }
                        if (new_vma->vm_ops && new_vma->vm_ops->open)
                                new_vma->vm_ops->open(new_vma);
                        vma_link(mm, new_vma, prev, rb_link, rb_parent);