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[PATCH] mm: more CONFIG_DEBUG_VM

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Put a few more checks under CONFIG_DEBUG_VM

Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Nick Piggin
2006-03-22 00:08:42 -08:00
committed by Linus Torvalds
parent 6626c5d53b
commit b7ab795b7b
2 changed files with 7 additions and 14 deletions
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12
mm/memory.c
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@@ -388,7 +388,7 @@ struct page *vm_normal_page(struct vm_area_struct *vma, unsigned long addr, pte_
{
unsigned long pfn = pte_pfn(pte);
if (vma->vm_flags & VM_PFNMAP) {
if (unlikely(vma->vm_flags & VM_PFNMAP)) {
unsigned long off = (addr - vma->vm_start) >> PAGE_SHIFT;
if (pfn == vma->vm_pgoff + off)
return NULL;
@@ -396,18 +396,12 @@ struct page *vm_normal_page(struct vm_area_struct *vma, unsigned long addr, pte_
return NULL;
}
/*
* Add some anal sanity checks for now. Eventually,
* we should just do "return pfn_to_page(pfn)", but
* in the meantime we check that we get a valid pfn,
* and that the resulting page looks ok.
*
* Remove this test eventually!
*/
#ifdef CONFIG_DEBUG_VM
if (unlikely(!pfn_valid(pfn))) {
print_bad_pte(vma, pte, addr);
return NULL;
}
#endif
/*
* NOTE! We still have PageReserved() pages in the page