mm: fault feedback #1

[linux-2.6-omap-h63xx.git] / mm / shmem.c

diff --git a/mm/shmem.c b/mm/shmem.c
index 6b44440f1b24d59af0ee3845fd65a6b88b16d147..0a555af8733d42d6325dcd53a36b98b6c29c3777 100644 (file)
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -1309,29 +1309,21 @@ failed:
        return error;
 }
 
-static struct page *shmem_fault(struct vm_area_struct *vma,
-                                       struct fault_data *fdata)
+static int shmem_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
 {
        struct inode *inode = vma->vm_file->f_path.dentry->d_inode;
-       struct page *page = NULL;
        int error;
+       int ret;
 
-       BUG_ON(!(vma->vm_flags & VM_CAN_INVALIDATE));
+       if (((loff_t)vmf->pgoff << PAGE_CACHE_SHIFT) >= i_size_read(inode))
+               return VM_FAULT_SIGBUS;
 
-       if (((loff_t)fdata->pgoff << PAGE_CACHE_SHIFT) >= i_size_read(inode)) {
-               fdata->type = VM_FAULT_SIGBUS;
-               return NULL;
-       }
-
-       error = shmem_getpage(inode, fdata->pgoff, &page,
-                                               SGP_FAULT, &fdata->type);
-       if (error) {
-               fdata->type = ((error == -ENOMEM)?VM_FAULT_OOM:VM_FAULT_SIGBUS);
-               return NULL;
-       }
+       error = shmem_getpage(inode, vmf->pgoff, &vmf->page, SGP_FAULT, &ret);
+       if (error)
+               return ((error == -ENOMEM) ? VM_FAULT_OOM : VM_FAULT_SIGBUS);
 
-       mark_page_accessed(page);
-       return page;
+       mark_page_accessed(vmf->page);
+       return ret | FAULT_RET_LOCKED;
 }
 
 #ifdef CONFIG_NUMA
@@ -1378,7 +1370,7 @@ static int shmem_mmap(struct file *file, struct vm_area_struct *vma)
 {
        file_accessed(file);
        vma->vm_ops = &shmem_vm_ops;
-       vma->vm_flags |= VM_CAN_INVALIDATE | VM_CAN_NONLINEAR;
+       vma->vm_flags |= VM_CAN_NONLINEAR;
        return 0;
 }
 
@@ -2560,6 +2552,5 @@ int shmem_zero_setup(struct vm_area_struct *vma)
                fput(vma->vm_file);
        vma->vm_file = file;
        vma->vm_ops = &shmem_vm_ops;
-       vma->vm_flags |= VM_CAN_INVALIDATE;
        return 0;
 }