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mm/mempolicy.c: remove BUG_ON() checks for VMA inside mpol_misplaced() 

VMA and its address bounds checks are too late in this function.  They
must have been verified earlier in the page fault sequence.  Hence just
remove them.

Link: http://lkml.kernel.org/r/20170901130137.7617-1-khandual@linux.vnet.ibm.com
Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Suggested-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
zero-colors
Anshuman Khandual 2017-09-08 16:13:32 -07:00 committed by Linus Torvalds
parent b6b1fd2a6b
commit 149728e913
1 changed files with 0 additions and 5 deletions
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5
mm/mempolicy.c
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@ -2233,17 +2233,12 @@ int mpol_misplaced(struct page *page, struct vm_area_struct *vma, unsigned long
int polnid = -1;
int ret = -1;
BUG_ON(!vma);
pol = get_vma_policy(vma, addr);
if (!(pol->flags & MPOL_F_MOF))
goto out;
switch (pol->mode) {
case MPOL_INTERLEAVE:
BUG_ON(addr >= vma->vm_end);
BUG_ON(addr < vma->vm_start);
pgoff = vma->vm_pgoff;
pgoff += (addr - vma->vm_start) >> PAGE_SHIFT;
polnid = offset_il_node(pol, pgoff);