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-rw-r--r--mm/shmem.c29
1 files changed, 10 insertions, 19 deletions
diff --git a/mm/shmem.c b/mm/shmem.c
index 6b44440f..0a555af 100644
--- 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;
}
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