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thp: pte alloc trans splitting

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pte alloc routines must wait for split_huge_page if the pmd is not present
and not null (i.e.  pmd_trans_splitting).  The additional branches are
optimized away at compile time by pmd_trans_splitting if the config option
is off.  However we must pass the vma down in order to know the anon_vma
lock to wait for.

[[email protected]: coding-style fixes]
Signed-off-by: Andrea Arcangeli <[email protected]>
Acked-by: Rik van Riel <[email protected]>
Acked-by: Mel Gorman <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Andrea Arcangeli 2011-01-13 15:46:43 -08:00 • committed by Linus Torvalds
commit 8ac1f8320a
11 changed files with 35 additions and 23 deletions
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2
arch/um/kernel/skas/mmu.c
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@ -31,7 +31,7 @@ static int init_stub_pte(struct mm_struct *mm, unsigned long proc,
if (!pmd)
goto out_pmd;
pte = pte_alloc_map(mm, pmd, proc);
pte = pte_alloc_map(mm, NULL, pmd, proc);
if (!pte)
goto out_pte;