filemap_fault — read in file data for page fault handling
int filemap_fault ( | struct vm_area_struct * | vma, |
| struct vm_fault * | vmf); |
filemap_fault is invoked via the vma operations vector for a
mapped memory region to read in file data during a page fault.
The goto's are kind of ugly, but this streamlines the normal case of having it in the page cache, and handles the special cases reasonably without having a lot of duplicated code.