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mm/huge_memory.c: fix comment in __split_huge_pmd_locked

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pmd_trans_splitting() was removed after THP refcounting redesign,
therefore related comment should be updated.

Link: http://lkml.kernel.org/r/1512625745-59451-1-git-send-email-xieyisheng1@huawei.com
Signed-off-by: Yisheng Xie <xieyisheng1@huawei.com>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Yisheng Xie 2018-01-31 16:17:29 -08:00 committed by Linus Torvalds
parent 9ac9322d7c
commit 9bebc09fcf
1 changed files with 3 additions and 4 deletions
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mm/huge_memory.c
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@ -2205,10 +2205,9 @@ static void __split_huge_pmd_locked(struct vm_area_struct *vma, pmd_t *pmd,
* for the same virtual address to be loaded simultaneously. So instead
* of doing "pmd_populate(); flush_pmd_tlb_range();" we first mark the
* current pmd notpresent (atomically because here the pmd_trans_huge
* and pmd_trans_splitting must remain set at all times on the pmd
* until the split is complete for this pmd), then we flush the SMP TLB
* and finally we write the non-huge version of the pmd entry with
* pmd_populate.
* must remain set at all times on the pmd until the split is complete
* for this pmd), then we flush the SMP TLB and finally we write the
* non-huge version of the pmd entry with pmd_populate.
*/
pmdp_invalidate(vma, haddr, pmd);
pmd_populate(mm, pmd, pgtable);