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mm: page_mkwrite change prototype to match fault

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Change the page_mkwrite prototype to take a struct vm_fault, and return
VM_FAULT_xxx flags.  There should be no functional change.

This makes it possible to return much more detailed error information to
the VM (and also can provide more information eg.  virtual_address to the
driver, which might be important in some special cases).

This is required for a subsequent fix.  And will also make it easier to
merge page_mkwrite() with fault() in future.

Signed-off-by: Nick Piggin <[email protected]>
Cc: Chris Mason <[email protected]>
Cc: Trond Myklebust <[email protected]>
Cc: Miklos Szeredi <[email protected]>
Cc: Steven Whitehouse <[email protected]>
Cc: Mark Fasheh <[email protected]>
Cc: Joel Becker <[email protected]>
Cc: Artem Bityutskiy <[email protected]>
Cc: Felix Blyakher <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Nick Piggin 2009-03-31 15:23:21 -07:00 • committed by Linus Torvalds
commit c2ec175c39
16 changed files with 65 additions and 23 deletions
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3
fs/fuse/file.c
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@ -1234,8 +1234,9 @@ static void fuse_vma_close(struct vm_area_struct *vma)
* - sync(2)
* - try_to_free_pages() with order > PAGE_ALLOC_COSTLY_ORDER
*/
static int fuse_page_mkwrite(struct vm_area_struct *vma, struct page *page)
static int fuse_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf)
{
struct page *page = vmf->page;
/*
* Don't use page->mapping as it may become NULL from a
* concurrent truncate.