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mm: allow pfnmap ->fault()s 

Take out an assertion to allow ->fault handlers to service PFNMAP regions.
This is required to reimplement .nopfn handlers with .fault handlers and
subsequently remove nopfn.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Acked-by: Jes Sorensen <jes@sgi.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Nick Piggin 2008-05-23 13:04:18 -07:00 committed by Linus Torvalds
parent c2448278e3
commit 42172d751b
1 changed files with 0 additions and 2 deletions
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2
mm/memory.c
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@ -2295,8 +2295,6 @@ static int __do_fault(struct mm_struct *mm, struct vm_area_struct *vma,
vmf.flags = flags; vmf.flags = flags;
vmf.page = NULL; vmf.page = NULL;
BUG_ON(vma->vm_flags & VM_PFNMAP);
ret = vma->vm_ops->fault(vma, &vmf); ret = vma->vm_ops->fault(vma, &vmf);
if (unlikely(ret & (VM_FAULT_ERROR | VM_FAULT_NOPAGE))) if (unlikely(ret & (VM_FAULT_ERROR | VM_FAULT_NOPAGE)))
return ret; return ret;