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mm: pagewalk: fix documentation of PTE hole handling 

Empty PTEs are passed to the pte_entry callback, not to pte_hole.

Link: https://lkml.kernel.org/r/3695521.kQq0lBPeGt@devpool047
Signed-off-by: Rolf Eike Beer <eb@emlix.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Rolf Eike Beer 2022-08-22 15:01:32 +02:00 committed by Andrew Morton
parent e09b0b61fb
commit e2f8f44b76
1 changed files with 5 additions and 5 deletions
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10
include/linux/pagewalk.h
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@ -15,12 +15,12 @@ struct mm_walk;
* this handler is required to be able to handle
* pmd_trans_huge() pmds. They may simply choose to
* split_huge_page() instead of handling it explicitly.
* @pte_entry: if set, called for each non-empty PTE (lowest-level)
* entry
* @pte_entry: if set, called for each PTE (lowest-level) entry,
* including empty ones
* @pte_hole: if set, called for each hole at all levels,
* depth is -1 if not known, 0:PGD, 1:P4D, 2:PUD, 3:PMD
* 4:PTE. Any folded depths (where PTRS_PER_P?D is equal
* to 1) are skipped.
* depth is -1 if not known, 0:PGD, 1:P4D, 2:PUD, 3:PMD.
* Any folded depths (where PTRS_PER_P?D is equal to 1)
* are skipped.
* @hugetlb_entry: if set, called for each hugetlb entry
* @test_walk: caller specific callback function to determine whether
* we walk over the current vma or not. Returning 0 means