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Commit d5ee7c3b authored by Andrea Arcangeli's avatar Andrea Arcangeli Committed by Linus Torvalds
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mm: thp: split_huge_pmd_address() comment improvement 

Comment is partly wrong, this improves it by including the case of
split_huge_pmd_address() called by try_to_unmap_one if TTU_SPLIT_HUGE_PMD
is set.

Link: http://lkml.kernel.org/r/1462547040-1737-4-git-send-email-aarcange@redhat.com


Signed-off-by: default avatarAndrea Arcangeli <aarcange@redhat.com>
Acked-by: default avatarKirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 5f527c2b

mm/huge_memory.c

+4 −2
Original line number Diff line number Diff line
@@ -3023,8 +3023,10 @@ void split_huge_pmd_address(struct vm_area_struct *vma, unsigned long address, 
		return;



	/*

	 * Caller holds the mmap_sem write mode, so a huge pmd cannot

	 * materialize from under us.

	 * Caller holds the mmap_sem write mode or the anon_vma lock,

	 * so a huge pmd cannot materialize from under us (khugepaged

	 * holds both the mmap_sem write mode and the anon_vma lock

	 * write mode).

	 */

	__split_huge_pmd(vma, pmd, address, freeze);

}