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thp: consolidate assert checks in __split_huge_page() 

It doesn't make sense to have two assert checks for each invariant: one
for printing and one for BUG().

Let's trigger BUG() if we print error message.

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Kirill A. Shutemov 2014-06-04 16:06:57 -07:00 committed by Linus Torvalds
parent 38f7ea5a08
commit ff9e43eb4f
1 changed files with 6 additions and 4 deletions
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10
mm/huge_memory.c
View File

@ -1830,10 +1830,11 @@ static void __split_huge_page(struct page *page,
* the newly established pmd of the child later during the
* walk, to be able to set it as pmd_trans_splitting too.
*/
if (mapcount != page_mapcount(page))
if (mapcount != page_mapcount(page)) {
printk(KERN_ERR "mapcount %d page_mapcount %d\n",
mapcount, page_mapcount(page));
BUG_ON(mapcount != page_mapcount(page));
BUG();
}
__split_huge_page_refcount(page, list);
@ -1844,10 +1845,11 @@ static void __split_huge_page(struct page *page,
BUG_ON(is_vma_temporary_stack(vma));
mapcount2 += __split_huge_page_map(page, vma, addr);
}
if (mapcount != mapcount2)
if (mapcount != mapcount2) {
printk(KERN_ERR "mapcount %d mapcount2 %d page_mapcount %d\n",
mapcount, mapcount2, page_mapcount(page));
BUG_ON(mapcount != mapcount2);
BUG();
}
}
/*