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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2007-02-12 00:51:38 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-02-12 09:48:27 -0800
commit22cd25ed31bbf849acaa06ab220dc4f526153f13 (patch)
treebffc0fa86b3734d89afb3eccb19249663de34ce2 /mm/memory.c
parente0dc0d8f4a327d033bfb63d43f113d5f31d11b3c (diff)
downloadop-kernel-dev-22cd25ed31bbf849acaa06ab220dc4f526153f13.zip
op-kernel-dev-22cd25ed31bbf849acaa06ab220dc4f526153f13.tar.gz
[PATCH] Add NOPFN_REFAULT result from vm_ops->nopfn()
Add a NOPFN_REFAULT return code for vm_ops->nopfn() equivalent to NOPAGE_REFAULT for vmops->nopage() indicating that the handler requests a re-execution of the faulting instruction Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Arnd Bergmann <arnd.bergmann@de.ibm.com> Cc: Hugh Dickins <hugh@veritas.com> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/memory.c')
-rw-r--r--mm/memory.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/mm/memory.c b/mm/memory.c
index 8b8f0d2..e7066e7 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -2355,10 +2355,12 @@ static noinline int do_no_pfn(struct mm_struct *mm, struct vm_area_struct *vma,
BUG_ON(is_cow_mapping(vma->vm_flags));
pfn = vma->vm_ops->nopfn(vma, address & PAGE_MASK);
- if (pfn == NOPFN_OOM)
+ if (unlikely(pfn == NOPFN_OOM))
return VM_FAULT_OOM;
- if (pfn == NOPFN_SIGBUS)
+ else if (unlikely(pfn == NOPFN_SIGBUS))
return VM_FAULT_SIGBUS;
+ else if (unlikely(pfn == NOPFN_REFAULT))
+ return VM_FAULT_MINOR;
page_table = pte_offset_map_lock(mm, pmd, address, &ptl);
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